Autor: Tanaka, J. - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Effect of On-Site Coulomb Repulsion on Phase Transitions in Exactly Solved Spin-Electron Model
Autorzy:: Gálisová, L.
Strečka, J.
Tanaka, A.
Verkholyak, T.
Tematy:: 05.50.+q
05.70.Jk
64.60.Cn
64.60.De; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1534796.pdf Link otwiera się w nowym oknie
Opis:: A hybrid lattice-statistical model on doubly decorated planar lattices, which have localized Ising spins at their nodal lattice sites and two itinerant electrons at each pair of decorating sites, is exactly solved by the use of a generalized decoration-iteration transformation. Our main attention is focused on an influence of the on-site Coulomb repulsion on ground-state properties and critical behavior of the investigated system.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 2.

Tytuł:: Recent Trends in ILO Conventions Related to Occupational Safety and Health
Autorzy:: Wilson, D. J.
Takahashi, K.
Smith, D. R.
Yoshino, M.
Tanaka, C.
Takala, J.
Tematy:: International Labour Organization
convention
ratification
occupational safety and health
prawo pracy
prawo
umowy międzynarodowe
bezpieczeństwo i higiena pracy
Międzynarodowa Organizacja Pracy
Międzynarodowe Biuro Pracy
konwencja
ratyfikacja; Pokaż więcej
Wydawca:: Centralny Instytut Ochrony Pracy
Powiązania:: https://bibliotekanauki.pl/articles/90843.pdf Link otwiera się w nowym oknie
Opis:: The present study was conducted to analyze the ratification status of International Labour Organization (ILO) conventions related to occupational safety and health (OSH) by ILO member states in terms of national indicators (length of ILO membership and national income status) and regional affiliation. 17 conventions designated as OSH-related by the 2003 International Labour Conference were examined. In general, countries with longer ILO membership ratified higher numbers of conventions related to OSH. With some variation, long-membership countries had the largest number of ratifications, followed by middle- and shortmembership countries in all regions. There were also incremental increases in the number of ratifications for OSH-related conventions according to the national income status. Common regional characteristics that could not be explained by the factors studied also existed. Future efforts to increase ratification at an international level will need to consider the factors influencing ratification practice among the member states.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 3.

Tytuł:: Extreme blazars studied with Fermi-LAT and Suzaku : 1ES 0347–121 and blazar candidate HESS J1943+213
Autorzy:: Finke, J.
Wagner, S. J.
Dubus, G.
Fukazawa, Y.
Stawarz, Łukasz
DeNaurois, M.
Cheung, C. C.
Tanaka, Y. T.
Dermer, C. D.
Bamba, A.
Kataoka, J.
Thompson, D. J.
Opis:: We report on our study of high-energy properties of two peculiar TeV emitters: the "extreme blazar" 1ES 0347–121 and the "extreme blazar candidate" HESS J1943+213 located near the Galactic plane. Both objects are characterized by quiescent synchrotron emission with flat spectra extending up to the hard X-ray range, and both were reported to be missing GeV counterparts in the Fermi Large Area Telescope (LAT) two-year Source Catalog. We analyze a 4.5 yr accumulation of the Fermi -LAT data, resulting in the detection of 1ES 0347–121 in the GeV band, as well as in improved upper limits for HESS J1943+213. We also present the analysis results of newly acquired Suzaku data for HESS J1943+213. The X-ray spectrum is well represented by a single power law extending up to 25 keV with photon index 2.00 $\pm$ 0.02 and a moderate absorption in excess of the Galactic value, which is in agreement with previous X-ray observations. No short-term X-ray variability was found over the 80 ks duration of the Suzaku exposure. Under the blazar hypothesis, we modeled the spectral energy distributions of 1ES 0347–121 and HESS J1943+213, and we derived constraints on the intergalactic magnetic field strength and source energetics. We conclude that although the classification of HESS J1943+213 has not yet been determined, the blazar hypothesis remains the most plausible option since, in particular, the broadband spectra of the two analyzed sources along with the source model parameters closely resemble each other, and the newly available Wide-field Infrared Survey Explorer and UKIRT Infrared Deep Sky Survey data for HESS J1943+213 are consistent with the presence of an elliptical host at the distance of approximately ~600 Mpc.
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

Artykuł

na półce

Skocz do pozycji: 4.

Tytuł:: Fermi-LAT and Suzaku observations of the radio galaxy Centaurus B
Autorzy:: Cheung, C. C.
Funk, S.
Kataoka, J.
Takahashi, T.
Svoboda, J.
Odaka, H.
Stawarz, Łukasz
Tanaka, Y. T.
Yuasa, T.
Katsuta, J.
O’Sullivan, S. P.
Opis:: Centaurus B is a nearby radio galaxy positioned in the southern hemisphere close to the Galactic plane. Here we present a detailed analysis of about 43 months of accumulated Fermi-LAT data of the $\gamma$-ray counterpart of the source initially reported in the 2nd Fermi-LAT catalog, and of newly acquired Suzaku X-ray data. We confirm its detection at GeV photon energies and analyze the extension and variability of the $\gamma$-ray source in the LAT dataset, in which it appears as a steady $\gamma$-ray emitter. The X-ray core of Centaurus B is detected as a bright source of a continuum radiation. We do not detect, however, any diffuse X-ray emission from the known radio lobes, with the provided upper limit only marginally consistent with the previously claimed ASCA flux. Two scenarios that connect the X-ray and $\gamma$-ray properties are considered. In the first one, we assume that the diffuse non-thermal X-ray emission component is not significantly below the derived Suzaku upper limit. In this case, modeling the inverse-Compton emission shows that the observed $\gamma$-ray flux of the source may in principle be produced within the lobes. This association would imply that efficient in-situ acceleration of the radiating electrons is occurring and that the lobes are dominated by the pressure from the relativistic particles. In the second scenario, with the diffuse X-ray emission well below the Suzaku upper limits, the lobes in the system are instead dominated by the magnetic pressure. In this case, the observed $\gamma$-ray flux is not likely to be produced within the lobes, but instead within the nuclear parts of the jet. By means of synchrotron self-Compton modeling, we show that this possibility could be consistent with the broad-band data collected for the unresolved core of Centaurus B, including the newly derived Suzaku spectrum.
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

Artykuł

na półce

Skocz do pozycji: 5.

Tytuł:: Sensitivity of the Cherenkov Telescope Array to spectral signatures of hadronic PeVatrons with application to Galactic Supernova Remnants
Autorzy:: Cristofari, P.
Karas, V.
Saturni, F. G.
Dos Anjos, R. d. C.
Kubo, H.
Roache, E.
Bulgarelli, A.
Biteau, J.
Lindfors, E.
Komin, N.
de Gouveia Dal Pino, E. M.
Kaaret, P.
Leone, F.
de Souza, V.
Bottacini, E.
Spengler, G.
Okumura, A.
Ponti, G.
Biland, A.
Galanti, G.
Green, D.
Evoli, C.
Lohse, T.
Stamerra, A.
Zavrtanik, M.
Paredes, J. M.
Nagai, A.
Giavitto, G.
Lombardi, S.
Nieto, D.
Einecke, S.
Nishijima, K.
Romano, P.
De Caprio, V.
Vallania, P.
Angüner, E. O.
Rando, R.
Brose, R.
Baktash, A.
Ballet, J.
Fukami, S.
Doro, M.
Razzaque, S.
Chiavassa, A.
Kleiner, T.
Balazs, C.
Ohm, S.
Meyer, D. M. -A.
Sánchez-Conde, M.
Giordano, F.
Vandenbroucke, J.
Di Pierro, F.
Tanaka, S. J.
Wagner, S. J.
Tavecchio, F.
Nikolajuk, M.
Michalowski, J.
Miener, T.
Giuliani, A.
Holder, J.
Aguasca-Cabot, A.
Armstrong, T.
Giunti, L.
Caraveo, P.
Barrio, J. A.
Contreras, J. L.
Grondin, M. -H.
Kluzniak, W.
Fedorova, E.
Scuderi, S.
Berti, A.
Mackey, J.
Bernardos-Martín, M. I.
Cascone, E.
Leto, G.
Williams, D.
Lamastra, A.
Rowell, G.
Hernández-Cadena, S.
Vercellone, S.
Romeo, G.
Godinovic, N.
de Almeida, U. Barres
Larriva, A. Baquero
Torres, D. F.
Blanch, O.
Testa, V.
Baxter, J. R.
Chernyakova, M.
Vuillaume, T.
Pantaleo, F. R.
Bucciantini, N.
Majumdar, P.
La Palombara, N.
Orito, R.
Mosè, M.
Falceta-Goncalves, D.
Cerruti, M.
Hnatyk, R.
Ohtani, Y.
Mello, A. J. T. S.
Martínez, I. Jiménez
Pirola, G.
Sergijenko, O.
Tothill, N.
Ghirlanda, G.
Kerszberg, D.
Słowikowska, A.
Beshley, V.
Persic, M.
Depaoli, D.
Gasbarra, C.
Kobayashi, Y.
Leuschner, F.
Aschersleben, J.
Pumo, M. L.
Elsässer, D.
Stanič, S.
Di Tria, R.
de Ona Wilhelmi, E.
Principe, G.
Schwanke, U.
Longo, F.
Manganaro, M.
Aguirre-Santaella, A.
Specovius, A.
Murach, T.
Emery, G.
Dwarkadas, V. V.
Acero, F.
Verna, G.
Aloisio, R.
Menchiari, S.
Viana, A.
Morselli, A.
Coimbra-Araujo, C.
Coelho, J. Goulart
Hoffmann, D.
Mitchell, A.
Wierzcholska, Alicja
Fegan, S.
Gammaldi, V.
Hofmann, W.
Hassan, T.
Sailer, S.
Pecimotika, M.
van Eldik, C.
López-Moya, M.
Martínez, G.
Carosi, R.
Fiandrini, E.
Kieda, D. B.
Reposeur, T.
Galaz, G.
Knödlseder, J.
Reichherzer, P.
Dolcetta, R. A. Capuzzo
López-Coto, R.
Oya, I.
Incardona, F.
Rigoselli, M.
Janecek, P.
Capasso, M.
Jung-Richardt, I.
Montaruli, T.
Arcaro, C.
Martinez, M.
Inada, T.
Sol, H.
Seglar-Arroyo, M.
Novosyadlyj, B.
Kornecki, P.
Tibaldo, L.
Heller, M.
Orlando, E.
Gunji, S.
Hrupec, D.
Starecki, T.
D'Amico, G.
Katz, U.
Hrabovsky, M.
Sharma, P.
Horvath, P.
Yoshikoshi, T.
Servillat, M.
Fontaine, G.
Alfaro, J.
Chen, A.
Schovánek, P.
Costantini, H.
Gréaux, L.
Orlando, S.
Hinton, J.
Moulin, E.
Micanovic, S.
Sarkar, S.
Miranda, J. M.
Crespo, N. Álvarez
Ong, R. A.
Mode, B.
Priyadarshi, C.
Rizi, V.
Di Venere, L.
Moderski, R.
Crocker, R.
Amato, E.
Miceli, M.
Inoue, S.
Pohl, M.
Prandini, E.
Cassol, F.
Kluge, G.
Di Girolamo, T.
Lenain, J. -P.
Macias, O.
Nemmen, R.
Orlandini, M.
Giarrusso, M.
Catalani, F.
della Volpe, D.
Molina, E.
Suomijarvi, T.
Pietropaolo, E.
Zampieri, L.
White, M.
Tjus, J. Becker
Chadwick, P.
van Scherpenberg, J.
Sadeh, I.
Cardillo, M.
Olmi, B.
Donini, A.
Spencer, S. T.
Orienti, M.
Diebold, S.
Niemiec, J.
Will, M.
Vorobiov, S.
Peresano, M.
Ishio, K.
Delgado, C.
Saha, L.
Acharyya, A.
Hnatyk, B.
Stolarczyk, T.
Reimer, O.
Mandat, D.
Vallage, B.
Giroletti, M.
Ostrowski, Michał
Vecchi, M.
Casanova, S.
Piano, G.
Quirrenbach, A.
Foffano, L.
Backes, M.
De Angelis, A.
Miceli, D.
Conforti, V.
Yoshida, T.
Fioretti, V.
Giglietto, N.
Walter, R.
Satalecka, K.
Richtler, T.
Martinez, O.
Agudo, I.
Renaud, M.
Batista, R. Alves
Rosillo, M. Nievas
Balbo, M.
D'Ammando, F.
Acosta, M. Vazquez
Zaharijas, G.
Loporchio, S.
Ohishi, M.
Siejkowski, Hubert
Bissaldi, E.
Noda, K.
Zhdanov, V. I.
Reimer, A.
Adam, R.
Morlino, G.
Vodeb, V.
Ferrand, G.
Tajima, H.
Manicò, G.
Lemoine-Goumard, M.
Tam, P. -H. T.
Asano, K.
Chudoba, J.
Sushch, I.
Munari, K.
Amati, L.
Rico, J.
Tian, W.
Mukherjee, R.
Khélifi, B.
Petruk, O.
Nagataki, S.
Pittori, C.
Kohri, K.
Jamrozy, Marek
Pueschel, E.
Ambrosi, G.
Jin, W.
Martí, J.
Bastieri, D.
Marconi, M.
Bregeon, J.
Ghalumyan, A.
Ascasibar, Y.
Scherer, A.
Pérez-Romero, J.
Bhattacharyya, S.
Jurysek, J.
Z̆ivec, M.
Nozaki, S.
Luque-Escamilla, P. L.
Lapington, J.
Schussler, F.
Ribó, M.
Benbow, W.
Kissmann, R.
Morcuende, D.
Láinez, M.
Riitano, L.
Rudak, B.
Liodakis, I.
Zavrtanik, D.
Starling, R.
Safi-Harb, S.
Filipovic, M.
Costa, A.
Gueta, O.
Sliusar, V.
Pereira, L. A. Stuani
Aramo, C.
Martins, V. Barbosa
Fiori, M.
Bernete, J.
Bhattacharjee, P.
Patricelli, B.
Pühlhofer, G.
Vitale, V.
Vignatti, J.
Djuvsland, J. I.
López-Oramas, A.
Shang, R. -Y.
Horan, D.
Chaty, S.
Suda, Y.
Rieger, F.
Bertucci, B.
Rosado, J.
Mohrmann, L.
Bordas, P.
Yang, L.
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

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Skocz do pozycji: 6.

Tytuł:: Suzaku X-ray imaging of the extended lobe in the giant radio galaxy NGC 6251 associated with the Fermi-LAT source 2FGL J1629.4+8236
Autorzy:: Cheung, C. C.
Stawarz, Łukasz
Takeuchi, Y.
Takahashi, Y.
Tanaka, Y.
Kataoka, J.
Takahashi, T.
Nakamori, T.
Celotti, A.
Maeda, K.
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

Artykuł

na półce

Skocz do pozycji: 7.

Tytuł:: Six years of Fermi-LAT and multi-wavelength monitoring of the broad-line radio galaxy 3c 120 : jet dissipation at sub-parsec scales from the central engine
Autorzy:: Gurwell, M. A.
Cheung, C. C.
Tahara, M.
Inoue, Y.
Kataoka, J.
Stawarz, Łukasz
Tanaka, Y. T.
Fukazawa, Y.
Doi, A.
Itoh, R.
Opis:: We present multi-wavelength monitoring results for the broad-line radio galaxy 3C 120 in the MeV/GeV, sub-millimeter, and 43 GHz bands over 6 yr. Over the past 2 yr, the Fermi-Large Area Telescope sporadically detected 3C 120 with high significance and the 230 GHz data also suggest an enhanced activity of the source. After the MeV/GeV detection from 3C 120 in MJD 56240–56300, 43 GHz Very Long Baseline Array (VLBA) monitoring revealed a brightening of the radio core, followed by the ejection of a superluminal knot. Since we observed the $\gamma$-ray and VLBA phenomena in temporal proximity to each other, it is naturally assumed that they are physically connected. This assumption was further supported by the subsequent observation that the 43 GHz core brightened again after a $\gamma$-ray flare occurred around MJD 56560. We can then infer that the MeV/GeV emission took place inside an unresolved 43 GHz core of 3C 120 and that the jet dissipation occurred at sub-parsec distances from the central black hole (BH), if we take the distance of the 43 GHz core from the central BH as $\sim$ 0.5 pc, as previously estimated from the time lag between X-ray dips and knot ejections. Based on our constraints on the relative locations of the emission regions and energetic arguments, we conclude that the $\gamma$ rays are more favorably produced via the synchrotron self-Compton process, rather than inverse Compton scattering of external photons coming from the broad line region or hot dusty torus. We also derived the electron distribution and magnetic field by modeling the simultaneous broadband spectrum.
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

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Skocz do pozycji: 8.

Tytuł:: Prospects for dark matter observations in dwarf spheroidal galaxies with the Cherenkov Telescope Array Observatory
Autorzy:: Pandey, A.
Cristofari, P.
Siejkowski, H.
Karas, V.
Cicciari, G. M.
Saturni, F. G.
Jarnot, C.
Chadwick, P. M.
Kubo, H.
Roache, E.
Meyer, D. M.-A.
Burmistrov, L.
Nosek, D.
Simongini, A.
Lindfors, E.
Escarate, P.
Komin, N.
de Gouveia Dal Pino, E. M.
Gallozzi, S.
Leone, F.
Hadasch, D.
Yao, Y.
Zhang, W.
Mereghetti, S.
Pech, M.
Bottacini, E.
Kluźniak, W.
Hara, S.
Okumura, A.
Laadim, F. De Frondat
García-Lago, F. Frías
Biland, A.
Galanti, G.
Ponti, G.
Abhishek, A.
Green, D.
Silvestri, G.
Takahashi, M.
Zech, A.
Stamerra, A.
Živec, M.
Zavrtanik, M.
Paredes, J. M.
Vigorito, C F.
Lombardi, S.
Nieto, D.
Nishijima, K.
Stuani, L. Augusto
Romano, P.
Sáez, J. Buces
Bosnjak, Z.
Gradetzke, T.
Rando, R.
Ferrarotto, F.
Sano, H.
Brose, R.
Doro, M.
Zamanillo, V. Moya
Chiavassa, A.
Balazs, C.
Chen, Y.
Bringmann, T.
Sánchez-Conde, M.
Spinello, S.
Antonelli, L. A.
Giordano, F.
Vandenbroucke, J.
Gianotti, F.
Rodríguez-Fernández, G.
Tanaka, S. J.
Berge, D.
Vacula, M.
Goldoni, P.
Ricci, C.
Miener, T.
Bahilo, J. Lozano
Aguasca-Cabot, A.
Batista, P. I.
Caraveo, P.
Barrio, J. A.
Contreras, J. L.
Burton, M.
Cotter, G.
Fedorova, E.
Prouza, M.
Voutsinas, G.
Berti, A.
Mackey, J.
Calisse, P. G.
Germani, S.
Cascone, E.
Cerasole, D.
Kowal, G.
Lamastra, A.
Rowell, G.
Travnicek, P.
Kushida, J.
Hussain, S.
Vercellone, S.
Romeo, G.
Dazzi, F.
Amans, J.-P.
Del Burgo, R.
Paoletti, R.
Tejedor, L. A.
Larriva, A. Baquero
Torres, D. F.
Blanch, O.
Djuvsland, J.
Testa, V.
Linhoff, M.
Chernyakova, M.
Eckner, C.
Chon, G.
Xotta, F.
Pantaleo, F. R.
Leonora, E.
Majumdar, P.
Otero-Santos, J.
Orito, R.
Falceta-Goncalves, D.
Gaug, M.
Castro-Tirado, A. J.
Alfaro, R.
Kaufmann, S.
Cerruti, M.
Hnatyk, R.
Beck, G.
Mello, A. J. T. S.
Jaroschewski, I.
Martínez, I. Jiménez
Pirola, G.
Paiva, J. G. Giesbrecht Formiga
Ducci, L.
Pintore, F.
Sergijenko, O.
Tothill, N.
Kerszberg, D.
Beshley, V.
Persic, M.
Sapienza, V.
Ruina, A.
Depaoli, D.
Gasbarra, C.
Viaux, N.
Tutone, A.
Glicenstein, J.-F.
Malyshev, D.
Pumo, M. L.
Furniss, A.
Elsässer, D.
Parmiggiani, N.
Sangiorgi, P.
Stanič, S.
Esposito, P.
Fukui, Y.
Castignani, G.
Yamazaki, R.
Kazanas, D.
Mariotti, M.
Bonollo, A.
Kataoka, J.
Girolamo, T. Di
Wierzcholska, A.
Principe, G.
Batzofin, R.
Fiasson, A.
Longo, F.
Aguirre-Santaella, A.
Ramos, A. Moreno
Murach, T.
Emery, G.
Schiavone, F.
Novotny, V.
de Leon, A. Rosales
Gasparrini, D.
de Souza, V.
Dwarkadas, V. V.
Martínez, M.
Fukazawa, Y.
Acero, F.
Verna, G.
Reis, I.
Zuriaga-Puig, J.
Lacave, B.
Viana, A.
Morselli, A.
Podobnik, F.
Pagliaro, A.
de Lavergne, M. de Bony
Recchia, S.
Barrios-Jiménez, L.
Cornejo, B.
Coelho, J. Goulart
Hoffmann, D.
Mitchell, A.
Salzmann, H.
Pfeifle, F.
Rodríguez-Vázquez, J. J.
Fegan, S.
Gammaldi, V.
Hofmann, W.
Olive, J.-F.
Hassan, T.
D’Amico, G.
Piano, A. Di
Keita, T.
Savchenko, V.
Perrotta, F.
Pecimotika, M.
López-Moya, M.
Mazin, D.
Molfese, C.
Carosi, R.
Gallego, J. Méndez
Panebianco, G.
Takeishi, R.
Volpe, D. della
Fiandrini, E.
Torradeflot, F.
Kieda, D. B.
Neto, J. P.
Galaz, G.
López-Coto, R.
Hanlon, W.
Oya, I.
Incardona, F.
Janecek, P.
Martínez, G. A.
Dinesh, A.
Siqueira, C.
Montaruli, T.
Arcaro, C.
Grolleron, G.
Queiroz, F. S.
Luciani, H.
Heckmann, L.
Caroff, S.
Inada, T.
Lazarević, S.
Sol, H.
Acosta, M. Vázquez
Kornecki, P.
Tibaldo, L.
Hayashi, K.
Garczarczyk, M.
Heller, M.
Orlando, E.
Capasso, G.
Hrupec, D.
Tonev, D.
Starecki, T.
Brunelli, G.
Carquin, E.
Vassiliev, V.
Blazek, J.
Palatiello, M.
De Angelis, A.
Horvath, P.
Moralejo, A.
Yoshikoshi, T.
Batković, I.
Fontaine, G.
Alfaro, J.
Rhode, W.
Costantini, H.
Gréaux, L.
de Naurois, M.
Lenain, J.-P.
Pinchbeck, L.
Orlando, S.
Moulin, E.
Sarkar, S.
Marsella, G.
Inoue, Y.
Miranda, J. M.
Abe, S.
Bunse, M.
Barbera, A. La
Aguilera, A. Pérez
Böttcher, M.
Ong, R. A.
Rizi, V.
Meyer, M.
Pierro, F. Di
Amato, E.
Miceli, M.
Inoue, S.
Cortina, J.
Pohl, M.
Prandini, E.
Macias, O.
Nemmen, R.
Truzzi, S.
Orlandini, M.
Molina, E.
Abhir, J.
Pietropaolo, E.
Roy, A.
White, M.
del Peral, L.
Tjus, J. Becker
Lyard, E.
Sadeh, I.
Menon, S.
Curtis-Ginsberg, Z.
Donini, A.
Ambrosino, D.
Kolar, D.
Márquez, I.
Cifuentes, A.
Green, J. G.
Diebold, S.
Niemiec, J.
Bonnoli, G.
González, C. Pozo
Tian, W. W.
Vorobiov, S.
Granot, J.
Peresano, M.
Feng, Q.
Chai, Y.
De Palma, G.
Sofia, I.
Delgado, C.
Duangchan, C.
Paneque, D.
Jahanvi, -
Saha, L.
Tramacere, A.
Acharyya, A.
Hnatyk, B.
Stolarczyk, T.
Reimer, O.
Voitsekhovskyi, V.
Guedes, L. M. V.
Mandat, D.
Bigongiari, C.
Pollet, V.
Dörner, J.
Vecchi, M.
Visentin, E.
Ríos, C.
Nikołajuk, M.
Quirrenbach, A.
Schipani, P.
Foffano, L.
Domínguez, D. Martín
Backes, M.
Miceli, D.
Conforti, V.
Soto, S. García
Marchetti, A.
Campoy-Ordaz, A.
Fioretti, V.
Araujo, C. H. Coimbra
Giglietto, N.
Muraishi, H.
Cuevas, O.
D’Ammando, F.
Walter, R.
Richtler, T.
Martinez, O.
Teshima, M.
Sengupta, D.
Agudo, I.
Batista, R. Alves
Capuzzo-Dolcetta, R.
Rosillo, M. Nievas
Balbo, M.
Tingay, S. J.
Loporchio, S.
Ruiz-Velasco, E.
Ambrosino, F.
Molero, M.
Bernardini, E.
Bissaldi, E.
Ebr, J.
Noda, K.
Zhdanov, V. I.
Reimer, A.
Vigliano, A.
Adam, R.
Egberts, K.
Wechakama, M.
Ferrand, G.
Bronzini, E.
Tajima, H.
Manicò, G.
González, J. M.
Alispach, C.
Asano, K.
Chudoba, J.
del Valle, M. V.
Tibolla, O.
Viale, I.
Glombitza, J.
Munari, K.
Nakamori, T.
Rico, J.
Hiroshima, N.
Frías, M. D. Rodríguez
Savarese, S.
Jean, P.
Petruk, O.
Reisenegger, A.
Pittori, C.
Giuffrida, R.
Cantlay, B. K.
Kohri, K.
Jamrozy, Marek
Iocco, F.
Pueschel, E.
Michailidis, M.
Ambrosi, G.
Iarlori, M.
Jin, W.
Ventura, S.
Moghadam, M. Ozlati
Iuliano, A.
Harvey, V. M.
Carrasco, M.-S.
Sguera, V.
Ghalumyan, A.
Heß, B.
Regeard, M.
Ascasibar, Y.
Tria, R. Di
Scherer, A.
Pérez-Romero, J.
van Eldik, C.
Bhattacharyya, S.
Rainò, S.
Jurysek, J.
Cortínez, A. Cerviño
De Lotto, B.
Nozaki, S.
Peron, G.
Luque-Escamilla, P. L.
Lapington, J.
Mangano, S.
Schussler, F.
Ribó, M.
Benbow, W.
Li, Y.
Delicado, M. Molina
Wohlleben, F.
Santos-Lima, R.
Kissmann, R.
Láinez, M.
Riitano, L.
Trois, A.
Rudak, B.
David, L.
Zavrtanik, D.
Starling, R.
Hamal, P.
Filipovic, M.
Costa, A.
Palombara, N. La
Gueta, O.
Sliusar, V.
González, J. Becerra
Abe, K.
Godoy, M. Escobar
Venere, L. Di
Aramo, C.
Martins, V. Barbosa
Kalekin, O.
Bernete, J.
Spiga, D.
Bhattacharjee, P.
Patricelli, B.
Chen, A. W.
Pühlhofer, G.
Nieves, C. Escañuela
Colapietro, M.
Vitale, V.
Vignatti, J.
López-Oramas, A.
Ettori, S.
Jankowsky, F.
Bartolini, C.
Horan, D.
Chaty, S.
Muraczewski, A.
Suda, Y.
Rieger, F.
Angel, L.
Tombesi, F.
Bertucci, B.
Caproni, A.
Poireau, V.
Rosado, J.
Opis:: The dwarf spheroidal galaxies (dSphs) orbiting the Milky Way are widely regarded as systems supported by velocity dispersion against self-gravity, and as prime targets for the search for indirect dark matter (DM) signatures in the GeV-to-TeV $\gamma$-ray range owing to their lack of astrophysical $\gamma$-ray background. We present forecasts of the sensitivity of the forthcoming Cherenkov Telescope Array Observatory (CTAO) to annihilating or decaying DM signals in these targets. An original selection of candidates is performed from the current catalogue of known objects, including both classical and ultrafaint dSphs. For each, the expected DM content is derived using the most comprehensive photometric and spectroscopic data available, within a consistent framework of analysis. This approach enables the derivation of novel astrophysical factor profiles for indirect DM searches, which are compared with results from the literature. From an initial sample of 64 dSphs, eight promising targets are identified – Draco I, Coma Berenices, Ursa Major II, Ursa Minor, and Willman 1 in the North, Reticulum II, Sculptor, and Sagittarius II in the South – for which different DM density models yield consistent expectations, leading to robust predictions. CTAO is expected to provide the strongest limits above ∼ 10 TeV, reaching velocity-averaged annihilation cross sections of $\sim 5 \times 10^{-25} cm^{3} s^{-1}$ and decay lifetimes up to $\sim 10^{26}$ s for combined limits. The dominant uncertainties arise from the imprecise determination of the DM content, particularly for ultrafaint dSphs. Observation strategies are proposed that optimize either deep exposures of the best candidates or diversified target selections.
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

Artykuł

na półce

Skocz do pozycji: 9.

Tytuł:: Prospects for γ-ray observations of the Perseus galaxy cluster with the Cherenkov Telescope Array
Autorzy:: Burton, M.
Di Venere, L.
Terauchi, K.
Petrucci, P.-O.
Heller, M.
Pühlhofer, G.
Meyer, D.M.-A.
Cifuentes, A.
Vovk, I.
Vázquez Acosta, M.
Cuevas, O.
Pantaleo, F.R.
Pirola, G.
Berti, A.
Di Girolamo, T.
Pueschel, E.
Ostrowski, Michał
Roache, E.
Brunetti, G.
Aschersleben, J.
Kobayashi, Y.
Wohlleben, F.
de Bony de Lavergne, M.
Incardona, F.
Kluźniak, W.
Fegan, S.
Lamastra, A.
Dominik, R.M.
Caproni, A.
Aguasca-Cabot, A.
Patricelli, B.
Nagataki, S.
Ribeiro, D.
Lenain, J.-P.
Laporte, P.
Hoffmann, D.
Depaoli, D.
Kataoka, J.
Emery, G.
Di Piano, A.
Conte, F.
Sergijenko, O.
Fallah Ramazani, V.
Torradeflot, F.
Lemoine-Goumard, M.
Nickel, L.
Horan, D.
Petruk, O.
Vitale, V.
Vercellone, S.
Yamamoto, T.
Bottacini, E.
Tsiahina, A.
Rudak, B.
Feng, Q.
Pintore, F.
Sliusar, V.
Cotter, G.
Palatiello, M.
Janecek, P.
Paoletti, R.
O'Brien, P.
Gasbarra, C.
Riitano, L.
Brun, F.
Wechakama, M.
Pietropaolo, E.
Kleiner, T.
Rainò, S.
Romeo, G.
Chaty, S.
Barbosa Martins, V.
Servillat, M.
Kluge, G.
Eckner, C.
Tramacere, A.
Giarrusso, M.
Rhode, W.
Pumo, M.L.
Oya, I.
Schipani, P.
Katagiri, H.
Viana, A.
Terrier, R.
De Lotto, B.
Santos-Lima, R.
Molfese, C.
Moderski, R.
Longo, F.
Torresi, E.
Zacharias, M.
Alfaro, R.
Gallozzi, S.
Kushida, J.
Hara, S.
Peron, G.
Harvey, V.M.
Contreras, J.L.
Shang, R.Y.
De Simone, N.
Gaggero, D.
Hadasch, D.
Grolleron, G.
De la Torre Luque, P.
Zhdanov, V.I.
Araya, M.
Donini, A.
Láinez, M.
Mas-Aguilar, A.
Bulgarelli, A.
Vodeb, V.
Salzmann, H.
Bhattacharjee, P.
della Volpe, D.
Fukui, Y.
Kowal, G.
Castro-Tirado, A.J.
Murach, T.
Benbow, W.
Kantzas, D.
Nievas Rosillo, M.
Strišković, J.
Grenier, I.
Delagnes, E.
Blanch, O.
González, J.M.
Savchenko, V.
Rosales de Leon, A.
Baquero Larriva, A.
Gueta, O.
Nosek, D.
Mello, A.J.T.S.
Font Guiteras, L.
Rowell, G.
Jiménez Martínez, I.
Podobnik, F.
Jean, P.
Principe, G.
Amato, E.
del Valle, M.V.
Ribó, M.
Hrupec, D.
Tothill, N.
Leitgeb, F.
Meyer, M.
Will, M.
Melkumyan, D.
Schubert, J.L.
Esposito, P.
Escudero, J.
Molina, E.
Vallage, B.
Leuschner, F.
Bronzini, E.
Hamal, P.
Tavernier, T.
Munari, K.
de Souza, V.
Mackey, J.
Faure, A.
Dazzi, F.
Arrabito, L.
Holder, J.
Ong, R.A.
Biland, A.
Sano, H.
Rodriguez Fernandez, G.
Vecchi, M.
Reichherzer, P.
Zdziarski, A.A.
Stolarczyk, T.
Batista, P.I.
Heckmann, L.
Righi, C.
Knödlseder, J.
Majumdar, P.
Nikołajuk, M.
Meunier, J.-L.
Rulten, C.B.
Caroff, S.
Dwarkadas, V.V.
Reisenegger, A.
Suomijärvi, T.
Galanti, G.
Batzofin, R.
Ohishi, M.
Hoang, J.
Morlino, G.
Saturni, F.G.
Nishijima, K.
Carrasco, M.-S.
Schwefer, G.
Beck, G.
Pagliaro, A.
Iocco, F.
Santangelo, A.
Ballester, O.
Delgado, C.
Jankowsky, F.
De Frondat Laadim, F.
Verna, G.
Ghalumyan, A.
Einecke, S.
González, M.M.
Steppa, C.
Prast, J.
Ashkar, H.
Starling, R.
Juramy-Gilles, C.
Produit, N.
Márquez, I.
Vallania, P.
Manicò, G.
Agudo, I.
Romano, P.
Nakamori, T.
Giesbrecht, J.
Martínez, G.A.
Toussenel, F.
Burmistrov, L.
Michałowski, J.
dos Anjos, R.D.C.
Curtis-Ginsberg, Z.
Biederbeck, N.
Rando, R.
Karas, V.
Chen, A.W.
Miener, T.
Escobar Godoy, M.
Pérez-Romero, J.
Chytka, L.
Prandini, E.
Antonelli, L.A.
Vacula, M.
Pech, M.
Panebianco, G.
Rizi, V.
Alvarez-Crespo, N.
Giordano, F.
Schwanke, U.
Acero, F.
Patel, S.R.
Šarić, T.
Balazs, C.
Hnatyk, R.
Blazek, J.
Zuriaga-Puig, J.
Delgado Giler, A.G.
Fioretti, V.
Punch, M.
Grube, J.
Lindfors, E.
Mastropietro, M.
Scherer, A.
Molero, M.
Acharyya, A.
Leto, G.
Cortina, J.
Marty, C.
Morcuende, D.
Batkovic, I.
Suda, Y.
Kubo, H.
Tajima, H.
Braiding, C.
Abe, S.
Ventura, S.
Ponti, G.
Mizuno, T.
Paredes, J.M.
Jamrozy, Marek
Olmi, B.
Marsella, G.
Leone, F.
Pita, S.
Satalecka, K.
Becker Tjus, J.
Olive, J.-F.
Tosti, L.
White, R.
Bradascio, F.
Orienti, M.
Lazarević, S.
Falceta-Goncalves, D.
Vandenbroucke, J.
Piano, G.
Voutsinas, G.
Sarkar, A.
Mitchell, A.
Reimer, A.
Barres de Almeida, U.
Biteau, J.
de Naurois, M.
Morik, K.
Dorner, D.
Živec, M.
Fedorova, E.
Cerasole, D.
Bhattacharyya, S.
Reimer, O.
Gasparrini, D.
Calisse, P.G.
Chadwick, P.
Sol, H.
Barrio, J.A.
Filipovic, M.
Fröse, S.
Green, D.
Baxter, J.
Egberts, K.
Pohl, M.
Zavrtanik, D.
Feijen, K.
Kaufmann, S.
Orito, R.
Giglietto, N.
Dumora, D.
Green, J.G.
Jin, W.
Miranda, J.M.
Paneque, D.
Nemmen, R.
Sanchez, D.
Pierre, E.
Aramo, C.
Chernyakova, M.
Boisson, C.
Horvath, P.
Michailidis, M.
Sanuy, A.
Cantlay, B.K.
Kerszberg, D.
Bucciantini, N.
Baktash, A.
Muraczewski, A.
Nozaki, S.
Brown, A.M.
Hackfeld, J.
Balbo, M.
Mandat, D.
Rieger, F.
Luque-Escamilla, P.L.
Yamazaki, R.
Doro, M.
Cerruti, M.
De Lucia, M.
Pons, E.
Truzzi, S.
Polo, M.
Niemiec, J.
Schleicher, B.
Tibaldo, L.
Chiavassa, A.
Vorobiov, S.
Manganaro, M.
Backes, M.
Tian, W.W.
Vigorito, C.F.
Vuillaume, T.
Inoue, S.
Wolter, A.
Okumura, A.
Khélifi, B.
La Palombara, N.
Rosado, J.
Rico, J.
Grau, R.
Iarlori, M.
Abe, K.
Tak, D.
Takeishi, R.
Hnatyk, B.
Markoff, S.
Costa, A.
Tejedor, L.A.
Bissaldi, E.
Vassiliev, V.
Yoshikoshi, T.
Djuvsland, J.
Recchia, S.
D'Ammando, F.
Djannati-Ataï, A.
Hassan, T.
Moulin, E.
Schussler, F.
Semikoz, D.
De Caprio, V.
Sánchez-Conde, M.
Martinez, O.
Loporchio, S.
Caraveo, P.
Starecki, T.
Hie, J.
Hanlon, W.
Macias, O.
Duangchan, C.
Goulart Coelho, J.
Gréaux, L.
Martínez, M.
Santander, M.
Bertucci, B.
Fattorini, A.
Mariotti, M.
Conforti, V.
López-Coto, R.
Ohtani, Y.
Carquin, E.
Quirrenbach, A.
Aguirre-Santaella, A.
Jarnot, C.
Stanič, S.
Linhoff, M.
Glicenstein, J.-F.
Bordas, P.
Pavlović, D.
Siqueira, C.
Lapington, J.
Bernete Medrano, J.
Torres, D.F.
Noda, K.
Morselli, A.
Muraishi, H.
Iori, M.
Nieto, D.
Slowikowska, A.
Richtler, T.
Gammaldi, V.
Asano, K.
Dournaux, J.-L.
Takahashi, M.
Walter, R.
La Barbera, A.
Zavrtanik, M.
López-Oramas, A.
de Gouveia Dal Pino, E.M.
Williams, D.A.
Razzaque, S.
Tutone, A.
Saito, T.
Hernández Cadena, S.
Amans, J.-P.
Mazin, D.
Alves Batista, R.
Inada, T.
Dörner, J.
Cristofari, P.
Spiga, D.
Liodakis, I.
Travnicek, P.
De Martino, D.
Mizote, M.
Gaug, M.
Spencer, S.T.
de Menezes, R.
Orlando, E.
Kissmann, R.
Kornecki, P.
Capuzzo-Dolcetta, R.
Brose, R.
Hofmann, W.
Novotny, V.
Sarkar, S.
van Scherpenberg, J.
Chudoba, J.
Parmiggiani, N.
Seiji, S.
Becerra González, J.
Bernlöhr, K.
Lombardi, S.
Plard, C.
Kosack, K.
Moya Zamanillo, V.
Burelli, I.
Sguera, V.
Diebold, S.
Dalchenko, M.
Campoy-Ordaz, A.
Ferrarotto, F.
Kohri, K.
Costantini, H.
Persic, M.
Bosnjak, Z.
Sadeh, I.
Goldoni, P.
Yoshida, T.
Göksu, H.
Specovius, A.
Rodríguez-Vázquez, J.J.
Voisin, V.
Viaux, N.
Evoli, C.
Fukazawa, Y.
Hervet, O.
Stawarz, Łukasz
Ferrand, G.
López-Moya, M.
Bolmont, J.
Sinha, A.
Kagaya, M.
Teshima, M.
Russo, F.
Orlandini, M.
Tanaka, S.J.
Pensec, U.
Foffano, L.
Malyshev, D.
Beshley, V.
Tripodo, G.
Granot, J.
D'Amico, G.
Fiandrini, E.
Coimbra Araujo, C.H.
Komin, N.
Regeard, M.
Elsässer, D.
Fiasson, A.
Neyroud, N.
Sharma, P.
Stamerra, A.
Priyadarshi, C.
Montaruli, T.
Peresano, M.
Ettori, S.
Queiroz, F.
Ebr, J.
Garczarczyk, M.
Alfaro, J.
Wierzcholska, A.
Sangiorgi, P.
Zaharijas, G.
Adam, R.
van Eldik, C.
Carosi, R.
Wagner, S.J.
Pecimotika, M.
Capalbi, M.
Bylund, T.
Zech, A.
Touzard, V.
Gianotti, F.
Arcaro, C.
Miceli, D.
Augusto Stuani, L.
Tosti, G.
Bi, B.
Di Pierro, F.
Marquez, P.
Baack, D.
Dell'aiera, M.
Maurin, G.
Siejkowski, H.
Seglar Arroyo, M.
Angüner, E.O.
Fontaine, G.
Ascasíbar, Y.
Jurysek, J.
Cassol, F.
Dubos, C.
Di Tria, R.
Saha, L.
Tibolla, O.
Hütten, M.
Cascone, E.
Hiroshima, N.
Vigliano, A.
Opis:: Galaxy clusters are expected to be both dark matter (DM) reservoirs and storage rooms for the cosmic-ray protons (CRp) that accumulate along the cluster's formation history. Accordingly, they are excellent targets to search for signals of DM annihilation and decay at γ-ray energies and are predicted to be sources of large-scale γ-ray emission due to hadronic interactions in the intracluster medium (ICM). In this paper, we estimate the sensitivity of the Cherenkov Telescope Array (CTA) to detect diffuse γ-ray emission from the Perseus galaxy cluster. We first perform a detailed spatial and spectral modelling of the expected signal for both the DM and the CRp components. For each case, we compute the expected CTA sensitivity accounting for the CTA instrument response functions. The CTA observing strategy of the Perseus cluster is also discussed. In the absence of a diffuse signal (non-detection), CTA should constrain the CRp to thermal energy ratio X$_{500}$ within the characteristic radius R$_{500}$ down to about $X_{500}< 3 \times10^{-3}$, for a spatial CRp distribution that follows the thermal gas and a CRp spectral index α$_{CRp}$ = 2.3. Under the optimistic assumption of a pure hadronic origin of the Perseus radio mini-halo and depending on the assumed magnetic field profile, CTA should measure α$_{CRp}$ down to about Δα$_{CRp}$ ≃ 0.1 and the CRp spatial distribution with 10% precision, respectively. Regarding DM, CTA should improve the current ground-based γ-ray DM limits from clusters observations on the velocity-averaged annihilation cross-section by a factor of up to ∼ 5, depending on the modelling of DM halo substructure. In the case of decay of DM particles, CTA will explore a new region of the parameter space, reaching models with $\tau_{χ} > 10^{27}$ s for DM masses above 1 TeV. These constraints will provide unprecedented sensitivity to the physics of both CRp acceleration and transport at cluster scale and to TeV DM particle models, especially in the decay scenario.
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

Artykuł

na półce

Skocz do pozycji: 10.

Tytuł:: Giant lobes of Centaurus a radio galaxy observed with the Suzaku X-ray satellite
Autorzy:: Cheung, C. C.
Madejski, G.
Reville, B.
Feain, I. J.
Siemiginowska, A.
Simionescu, A.
Kataoka, J.
Hardcastle, M. J.
Ostrowski, Michał
Takahashi, T.
Takeuchi, Y.
Werner, N.
Tanaka, Y. T.
Stawarz, Łukasz
Fukazawa, Y.
Gandhi, P.
Takei, Y.
O’Sullivan, S. P.
Opis:: We report on Suzaku observations of selected regions within the southern giant lobe of the radio galaxy Centaurus A. In our analysis we focus on distinct X-ray features detected with the X-ray Imaging Spectrometer within the range 0.5-10 keV, some of which are likely associated with fine structure of the lobe revealed by recent high-quality radio intensity and polarization maps. With the available photon statistics, we find that the spectral properties of the detected X-ray features are equally consistent with thermal emission from hot gas with temperatures kT > 1 keV, or with a power-law radiation continuum characterized by photon indices $\Gamma \sim 2.0 \pm 0.5$. However, the plasma parameters implied by these different models favor a synchrotron origin for the analyzed X-ray spots, indicating that a very efficient acceleration of electrons up to $_{\sim }^{>} 10$ TeV energies is taking place within the giant structure of Centaurus A, albeit only in isolated and compact regions associated with extended and highly polarized radio filaments. We also present a detailed analysis of the diffuse X-ray emission filling the whole field of view of the instrument, resulting in a tentative detection of a soft excess component best fitted by a thermal model with a temperature of $\mathit{kT} \sim 0.5$ keV. The exact origin of the observed excess remains uncertain, although energetic considerations point to thermal gas filling the bulk of the volume of the lobe and mixed with the non-thermal plasma, rather than to the alternative scenario involving a condensation of the hot intergalactic medium around the edges of the expanding radio structure. If correct, this would be the first detection of the thermal content of the extended lobes of a radio galaxy in X-rays. The corresponding number density of the thermal gas in such a case is ng $\mathit{n_{g}} \sim 10^{-4} \mathrm{cm}^{-3}$, while its pressure appears to be in almost exact equipartition with the volume-averaged non-thermal pressure provided by the radio-emitting electrons and the lobes' magnetic field. A prominent large-scale fluctuation of the Galactic foreground emission, resulting in excess foreground X-ray emission aligned with the lobe, cannot be ruled out. Although tentative, our findings potentially imply that the structure of the extended lobes in active galaxies is likely to be highly inhomogeneous and non-uniform, with magnetic reconnection and turbulent acceleration processes continuously converting magnetic energy to internal energy of the plasma particles, leading to possibly significant spatial and temporal variations in the plasma \beta parameter around the volume-averaged equilibrium condition \beta.
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

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