Autor: Moderski, R. - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Gamma-ray emission from young radio galaxies
Autorzy:: Moderski, R.
Kataoka, J.
Begelman, M. C.
Wagner, S.
Ostorero, L.
Stawarz, Łukasz
Wydawca:: Astronomical Society of the Pacific
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

Inne

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Skocz do pozycji: 2.

Tytuł:: Evolution of and high-energy emission from GHz-peaked spectrum sources
Autorzy:: Ostorero, L.
Kataoka, J.
Stawarz, Łukasz
Begelman, M. C.
Moderski, R.
Wagner, S.
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

Artykuł

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Skocz do pozycji: 3.

Tytuł:: Time-dependent modeling of gamma-ray flares in blazar PKS1510–089
Autorzy:: Stawarz, Łukasz
Saito, S.
Moderski, R.
Takahashi, T.
Sikora, M.
Tanaka, Y. T.
Opis:: Here we present a new approach for constraining luminous blazars, incorporating fully time-dependent and selfconsistent modeling of bright $\gamma$-ray flares of PKS 1510–089, resolved with Fermi-LAT, in the framework of the internal shock scenario. The results of our modeling imply the location of the $\gamma$-ray flaring zone to be outside of the broad-line region, namely around \simeq 3 pc from the core for a free-expanding jet with the opening angle $\Gamma\Theta_{jet}\simeq 1$ (where $\Gamma$ is the jet bulk Lorentz factor), up to $\simeq 3$ pc for a collimated outflow with \Gamma\Theta_{jet}\simeq 0.1. Moreover, under the $\Gamma\Theta_{jet}\simeq 1$ condition, our modeling indicates the maximum efficiency of the jet production during the flares, with the total jet energy flux strongly dominated by protons and exceeding the available accretion power in the source. This is in contrast to the quiescence states of the blazar, characterized by lower jet kinetic power and an approximate energy equipartition between different plasma constituents. We demostrate how strictly simultaneous observations of flaring PKS 1510–089 at optical, X-ray, and GeV photon energies, on hourly timescales, augmented by extensive simulations as presented in this paper, may help to impose further precise constraints on the magnetization and opening angle of the emitting region. In addition, our detailed modeling implies that a nonuniformity of the Doppler factor across the jet, caused by the radial expansion of the outflow, may lead to a pronounced time distortion in the observed $\gamma$-ray light curves, resulting, in particular, in asymmetric flux profiles with substantially extended decay phases.
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

Artykuł

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Skocz do pozycji: 4.

Tytuł:: Monte Carlo simulations for the Cherenkov Telescope Array Observatory using PL-Grid e-infrastructure
Autorzy:: Barnacka, A.
Bogacz, L.
Grudzińska, M.
Janiak, M.
Komin, N.
Lamanna, G.
Moderski, R.
Tematy:: very high energy astrophysics
Monte Carlo simulations
extensive air showers
telescope design
Cherenkov Telescope Array; Pokaż więcej
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Powiązania:: https://bibliotekanauki.pl/articles/305301.pdf Link otwiera się w nowym oknie
Opis:: The paper presents Monte Carlo simulations carried out during the preparatory phase of the Cherenkov Telescope Array project. The aim of the project is to build the next generation observatory of very high energy gamma rays. During the preparatory phase there is a need to optimize and verify design concepts for various elements of the array. In this paper we describe the main components of the software being used for that purpose, their functions and requirements. Preliminary results of the optimization of the small telescope – one of the several kinds intended for the array, are presented.
Dostawca treści:: Biblioteka Nauki