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Wyświetlanie 1-10 z 28
Tytuł:
Primary black hole spin in OJ 287 as determined by the general relativity centenary flare
Autorzy:
Reichart, D. E.
Chavushyan, V.
Tomov, T.
Berdyugin, A.
Schweyer, T.
Naves Nogues, R.
Campos, F.
Poyner, G.
Lindfors, E.
Kidger, M.
Perri, M.
Joshi, A.
Jermak, H.
Neely, A. W.
Sonbas, E.
Er, H.
Tremosa Espasa, L.
Ogloza, W.
Keel, W. C.
Haislip, J. B.
Mugrauer, M.
Raj, A.
Filippenko, A. V.
Reinthal, R.
Soldán Alfaro, F. C.
Nelson, R. H.
Valero Pérez, J.
Okano, S.
Campas Torrent, M.
Saario, J.
Blay, P.
Zheng, W.
Valdes, J. R.
Provencal, J.
Harmanen, J.
Salto González, J.-L.
Erdem, A.
Matsumoto, K.
Piirola, V.
Gopinathan, M.
Strobl, J.
Pandey, J. C.
Valtonen, M. J.
Alicavus, F.
Caton, D. B.
Moore, J. P.
Carrillo Gómez, J.
Escartin Pérez, A.
Dębski, Bartłomiej
Ciprini, S.
Sameer
Kaur, N.
Reynolds, T.
Baliyan, K. S.
Verrecchia, F.
Zejmo, M.
Gazeas, K.
Hudec, R.
Drozdz, M.
Sakanoi, T.
Dalessio, J.
Dimitrov, D.
Hurst, G.
Gafton, E.
Sadakane, K.
Lozano de Haro, J.
Ivarsen, K. M.
Nilsson, K.
Garcia, F.
Steele, I.
Karjalainen, R.
Yoneda, M.
Takalo, L. O.
Sadegi, S.
Siwak, Michał
Gómez Pinilla, F.
Gopakumar, A.
Fallah Ramazani, V.
Kvammen, A.
Ganesh, S.
Jelinek, M.
Webb, J. R.
Pihajoki, P.
Boyd, D.
Lee, B. C.
Stocke, J. T.
LaCluyze, A. P.
Pursimo, T.
Zoła, Stanisław
Kagitani, M.
Telting, J.
Opis:
OJ 287 is a quasi-periodic quasar with roughly 12 year optical cycles. It displays prominent outbursts that are predictable in a binary black hole model. The model predicted a major optical outburst in 2015 December. We found that the outburst did occur within the expected time range, peaking on 2015 December 5 at magnitude 12.9 in the optical R-band. Based on Swift/XRT satellite measurements and optical polarization data, we find that it included a major thermal component. Its timing provides an accurate estimate for the spin of the primary black hole, x=0.313 $\pm$ 0.01. The present outburst also confirms the established general relativistic properties of the system such as the loss of orbital energy to gravitational radiation at the 2% accuracy level, and it opens up the possibility of testing the black hole no-hair theorem with 10% accuracy during the present decade.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
Authenticating the presence of a relativistic massive black hole binary in OJ 287 using its general relativity centenary flare : improved orbital parameters
Autorzy:
Ogloza, W.
Gopinathan, M.
Boyd, D.
Harmanen, J.
Gómez Pinilla, F.
Ciprini, S.
Carrillo Gómez, J.
Dey, Lankeswar
Kidger, M.
Jermak, H.
Baransky, A.
Garcia, F.
Mugrauer, M.
Soldán Alfaro, F. C.
Chavushyan, V.
Tomov, T.
Kvammen, A.
Caton, D. B.
Mikkola, S.
Filippenko, A. V.
Verrecchia, F.
Escartin Pérez, A.
Valdes, J. R.
Janík, J.
Hudec, R.
Nilsson, K.
Zoła, Stanisław
Gafton, E.
Reichart, D. E.
Salto González, J.-L.
Chandra, S.
Naves Nogues, R.
Gopakumar, A.
Pursimo, T.
Provencal, J.
Joshi, A.
Yoneda, M.
Campos, F.
Reinthal, R.
Fallah Ramazani, V.
Vasylenko, V.
Sillanpää, A.
Baliyan, K. S.
Zielinski, P.
Kagitani, M.
Sameer, Sameer
Sadegi, S.
Lehto, H. J.
Webb, J. R.
Er, H.
Gazeas, K.
Perri, M.
Karjalainen, R.
Zheng, W.
Pihajoki, P.
Boumis, P.
Liakos, A.
Sakanoi, T.
Schweyer, T.
Dalessio, J.
Campas Torrent, M.
Hurst, G.
Piirola, V.
Neely, A. W.
Raj, A.
Blay, P.
Reynolds, T.
Zejmo, M.
Stocke, J. T.
Nelson, R. H.
Matsumoto, K.
Kurowski, Sebastian
Lozano de Haro, J.
Alicavus, F.
Siwak, Michał
Saario, J.
Ganesh, S.
Kundera, Tomasz
Tremosa Espasa, L.
Dębski, Bartłomiej
Drozdz, M.
Strobl, J.
Steele, I.
Takalo, L. O.
Valero Pérez, J.
Simon, A.
Poyner, G.
Sadakane, K.
Erdem, A.
Jelinek, M.
Sonbas, E.
Kaur, N.
Okano, S.
LaCluyze, A. P.
Kouprianov, V. V.
Lindfors, E.
Pajdosz-Śmierciak, Urszula
Berdyugin, A.
Godunova, V.
Haislip, J. B.
Pandey, J. C.
Keel, W. C.
Lee, B. C.
Valtonen, M. J.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
Stochastic modeling of multiwavelength variability of the classical BL Lac object OJ 287 on timescales ranging from decades to hours
Autorzy:
Chavushyan, V.
Berdyugin, A.
Wiita, P. J.
Schweyer, T.
Naves Nogues, R.
Hovatta, T.
Campos, F.
Salto González, J. L.
Poyner, G.
Kidger, M.
Perri, M.
Kozieł-Wierzbowska, Dorota
Joshi, A.
Jermak, H.
Neely, A. W.
Sonbas, E.
Er, H.
Tremosa Espasa, L.
Ogloza, W.
Haislip, J. B.
Mugrauer, M.
Kurowski, Sebastian
Raj, A.
Filippenko, A. V.
Marscher, A.
Boumis, P.
Reinthal, R.
Soldán Alfaro, F. C.
Sameer, Sameer
Zielinski, P.
Okano, S.
Campas Torrent, M.
Saario, J.
Gopal, Krishna
Blay, P.
Liakos, A.
Zheng, W.
Valdes, J. R.
Provencal, J.
Harmanen, J.
Baransky, A.
Erdem, A.
Matsumoto, K.
Piirola, V.
Gopinathan, M.
Aller, M. F.
Strobl, J.
Godunova, V.
Pandey, J. C.
Simon, A. O.
Alicavus, F.
Caton, D. B.
Mohammed, I.
Moore, J. P.
Carrillo Gómez, J.
Haque, S.
Janik, J.
Escartin Pérez, A.
Dębski, Bartłomiej
Ciprini, S.
Kaur, N.
Karaman, N.
Sobolewska, M.
Reynolds, T.
Baliyan, K. S.
Verrecchia, F.
Zejmo, M.
Gazeas, K.
Hudec, R.
Drozdz, M.
Sakanoi, T.
Dalessio, J.
Baran, A.
Dimitrov, D.
Vasylenko, V. V.
Hurst, G.
Aller, H. D.
Reichart, D.
Kuligowska, Elżbieta
Stawarz, Łukasz
Gafton, E.
Sadakane, K.
Lozano de Haro, J.
Ivarsen, K. M.
Rajkumar, B.
Nilsson, K.
Jorstad, S.
Garcia, F.
Soida, Marian
Karjalainen, R.
Yoneda, M.
Takalo, L. O.
Cheung, C. C.
Siemiginowska, A.
Sadegi, S.
Siwak, Michał
Gómez Pinilla, F.
Pajdosz, Urszula
Fallah Ramazani, V.
Giroletti, M.
Ostrowski, Michał
Kvammen, A.
Kundera, Tomasz
Marchenko, Volodymyr
Webb, J. R.
Boyd, D.
Lee, B. C.
LaCluyze, A. P.
Pursimo, T.
Zoła, Stanisław
Bufan, Y.
Kagitani, M.
Goyal, Arti
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
Collective coordinates method for long-range kink collisions
Autorzy:
Mohammadi, A.
Romańczukiewicz, Tomasz
Campos, J. G. F.
Opis:
In this paper, we explored a class of potentials with three minima that support kink solutions exhibiting one long-range tail. We analyzed antikink-kink interactions using an effective Lagrangian based on collective coordinates and compared the results to those obtained from full dynamical simulations. To this end, we constructed the collective coordinates with the antikink-kink configuration, and also a generalized Derrick mode, choosing the kink position and the Derrick mode amplitude as the moduli. For the antikink-kink configuration, we utilized the impurity ansatz proposed in [1]. We also studied the interaction of wobbling kinks where the lowest delocalized mode is excited.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
41st Solid Mechanics Conference : Book of Abstract
41st SolMech, Warsaw, August 27-31, 2018
Modelling Kinematic Hardening for Progressive Mean Stress Relaxation in Plasticity
Autorzy:
De Souza Campos, E. R. F.
Desmorat, R.
Malcher, L.
Współwytwórcy:
Burczyński, Tadeusz Ed.
Wiśniewski, Krzysztof Ed.
Wydawca:
Institute of Fundamental Technological Research Polish Academy of Sciences
Opis:
[23], 1-531 s., [532-538] Author Index
Dostawca treści:
RCIN - Repozytorium Cyfrowe Instytutów Naukowych
Książka
Tytuł:
Real-time monitoring of photoinduced atom transfer radical polymerization by time-resolved diffusion NMR
Autorzy:
Matyjaszewski, Krzysztof
Urbańczyk, Mateusz
Kapil, Kriti
Szczepaniak, Grzegorz
Westermair, Franz F.
Cybularczyk-Cecotka, Martyna
Czarnota, Marek
Arrabal Campos, Francisco
Wydawca:
RSC
Cytata wydawnicza:
Polym. Chem., 2026, Advance Article. DOI https://doi.org/10.1039/D6PY00103C
Opis:
Conventional real-time monitoring of polymerization is a laborious process that requires offline sampling and analysis. In this work, we introduce an advanced approach that combines Time-Resolved Diffusion NMR with 1H NMR for the simultaneous, in situ tracking of both monomer conversion and molecular weight evolution. We successfully applied this method to monitor the photoinduced atom transfer radical polymerization (photo-ATRP) in real-time. Furthermore, by coupling the gamma model with dispersity-matched accumulation, we accurately determined the dispersity values of the resulting polymers. To make the method more accessible, we developed a user-friendly program that sets up the acquisition and simplifies real-time monitoring of photo-ATRP. Additionally, the program allows stopping illumination at any desired monomer conversion, enabling easy control of the process.
M. U. and M. C would like to thank the National Science Centre, Poland, for its support in the form of an OPUS Grant (2021/41/B/ST4/01286). M. C. C and G. S acknowledge support from the Polish National Agency for Academic Exchange under the Polish Returns program (BPN/PPO/2022/1/00027) and the Polish National Science Center (2023/02/1/ST4/00009). K. K. and K. M. acknowledge support from NSF (CHE 2401112).
Dostawca treści:
Repozytorium Centrum Otwartej Nauki
Artykuł
Tytuł:
Radio–FIR correlation : a probe into cosmic ray propagation in the nearby galaxy IC 342
Autorzy:
Dettmar, R. -J.
Howaida, P.
Nasirzadeh, M. R.
Paladino, R.
Chyży, Krzysztof
Beck, R.
Heesen, V.
Reina-Campos, M.
Tabatabaei, F. S.
Opis:
Resolved studies of the correlation between the radio and far-infrared (FIR) emission from galaxies at different frequencies can unveil the interplay between star formation and the relativistic interstellar medium (ISM). Thanks to the LOFAR LoTSS observations combined with VLA, Herschel, and WISE data, we study the role of cosmic rays and magnetic fields in the radio–FIR correlation on scales of ≳200 pc in the nearby galaxy IC 342. The thermal emission traced by the 22 μm emission, constitutes about 6%, 13%, and 30% of the observed radio emission at 0.14, 1.4, and 4.8 GHz, respectively, in star-forming regions and less in other parts. The nonthermal spectral index becomes flatter at frequencies lower than 1.4 GHz ($\alpha_{n}$ = −0.51 ± 0.09, $S_{v} \propto v^{\alpha_{n}}$ than between 1.4 and 4.8 GHz ($\alpha_{n}$ = −1.06 ± 0.19) on average, and this flattening occurs not only in star-forming regions but also in the diffuse ISM. The radio–FIR correlation holds at all radio frequencies; however, it is tighter at higher radio frequencies. A multi-scale analysis shows that this correlation cannot be maintained on small scales due to diffusion of cosmic ray electrons (CREs). The correlation breaks at a larger scale (≃320 pc) at 0.14 GHz than at 1.4 GHz (≃200 pc), indicating that the CREs traced at lower frequencies have diffused a longer path in the ISM. We find that the energy index of CREs becomes flatter in star-forming regions, in agreement with previous studies. Cooling of CREs due to the magnetic field is evident globally only after compensating for the effect of star formation activity that both accelerates CREs and amplifies magnetic fields. Compared with other nearby galaxies, we show that the smallest scale of the radio–FIR correlation is proportional to the propagation length of the CREs on which the ordered magnetic field has an important effect.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
Positron-positronium converters in reflection and transmission geometry for gravitational experiments with antihydrogen using Moiré deflectometry
Autorzy:
Consolati, G.
Prelz, F.
Povolo, L.
Khatri, G.
Pecak, D.
Rienäcker, B.
Glöggler, L. T.
Gustafsson, F.
Zielinski, J.
Volponi, M.
Ferguson, R. C.
Hugenschmidt, C.
Kasprowicz, G.
Pospisil, S.
Germann, M.
Camper, A.
Gusakova, N.
Piwiński, M.
Bergmann, B.
Kempny, K.
Linek, A.
Huck, S.
Rodin, V.
Brusa, R. S.
Smolyanskiy, P.
Krumins, V.
Auzins, M.
Pandey, Piyush
Røhne, O. M.
Janik, M. A.
Alfaro Campos, S.
Münster, M.
Zurlo, N.
Rawat, B. S.
Caravita, R.
Lappo, L.
Doser, M.
Berghold, M.
Ciuryło, R.
Eliaszuk, K.
Giszczak, A.
Welsch, C. P.
Chehaimi, A.
Tefelski, D.
Rangwala, S. A.
Kornakov, G.
Rauschendorfer, T.
Penasa, L.
Petracek, V.
Grosbart, M.
Mariazzi, S.
Sandaker, H.
Guatieri, F.
Burian, P.
Vafeiadis, T.
Haider, S.
Zawada, M.
Kłosowski, Ł.
Sharma, Sushil
Castelli, F.
Cerchiari, G.
Moskal, Paweł
Graczykowski, Ł.
Sowiński, T.
Januszek, T.
Opis:
In the context of the Antihydrogen Experiment: Gravity, Interferometry, Spectroscopy (AEgIS) located at CERN, positron-positronium converters with a high positron-positronium conversion efficiency have been designed in both reflection and transmission geometries. The converters utilize nanochanneled silicon target technology with positron conversion efficiencies up to around 50% and around 16%, at room temperature and in the absence of magnetic fields, for reflection and transmission respectively. The positron-positronium converters allow for the pulsed production of antihydrogen ($\overline{H}$) within the AEgIS experiment. This paper discusses the use of a pulsed $\overline{H}$ beam in a moiré deflectometer to perform a precise gravitational measurement on $\overline{H}$ at AEgIS. This work describes the principles and technical details of the current design of a moiré deflectometer using the pulsed $\overline{H}$ beam. The main goal of this work is to summarize the ongoing project of adding the described moiré deflectometer to the AEgIS experiment to further their efforts toward probing the material dependence of gravity and testing the weak equivalence principle (WEP).
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
Laser cooling positronium with broadband laser pulses
Autorzy:
Consolati, G.
Prelz, F.
Povolo, L.
Khatri, G.
Pecak, D.
Rienäcker, B.
Glöggler, L. T.
Gustafsson, F.
Zielinski, J.
Volponi, M.
Hugenschmidt, C.
Kasprowicz, G.
Pospisil, S.
Germann, M.
Camper, A.
Gusakova, N.
Piwiński, M.
Bergmann, B.
Kempny, K.
Linek, A.
Huck, S.
Rodin, V.
Brusa, R. S.
Smolyanskiy, P.
Krumins, V.
Auzins, M.
Pandey, Piyush
Røhne, O. M.
Janik, M. A.
Alfaro Campos, S.
Münster, M.
Zurlo, N.
Ferguson, R.
Caravita, R.
Lappo, L.
Rawat, B. S.
Doser, M.
Berghold, M.
Ciuryło, R.
Eliaszuk, K.
Giszczak, A.
Welsch, C. P.
Chehaimi, A.
Tefelski, D.
Rangwala, S. A.
Kornakov, G.
Rauschendorfer, T.
Penasa, L.
Petracek, V.
Grosbart, M.
Mariazzi, S.
Sandaker, H.
Guatieri, F.
Burian, P.
Vafeiadis, T.
Haider, S.
Zawada, M.
Kłosowski, Ł.
Sharma, Sushil
Castelli, F.
Cerchiari, G.
Moskal, Paweł
Graczykowski, Ł.
Sowiński, T.
Januszek, T.
Opis:
The first successful demonstration of broadband laser cooling of positronium (Ps) atoms, obtained within the AEgIS experiment at CERN, is presented here. By employing a custom-designed pulsed alexandrite laser system at 243 nm featuring long-duration pulses of 70 ns and an energy able to saturate the 13S–23P transition over the broad spectrum range of 360 GHz, the temperature of a room-temperature Ps cloud was reduced from 380 K to 170 K in 70 ns. This advancement opens new avenues for precision spectroscopy, antihydrogen production, and fundamental tests with antimatter.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Wyświetlanie 1-10 z 28

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