Počet záznamů: 1
A theoretical study of the time lags due to Comptonization and the constraints on the X-ray corona in AGNs
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SYSNO ASEP 0570192 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název A theoretical study of the time lags due to Comptonization and the constraints on the X-ray corona in AGNs Tvůrce(i) Zhang, Wenda (ASU-R) ORCID
Papadakis, I.E. (GR)
Dovčiak, Michal (ASU-R) RID, ORCID
Bursa, Michal (ASU-R) RID, ORCID
Karas, Vladimír (ASU-R) RID, ORCIDCelkový počet autorů 5 Zdroj.dok. Monthly Notices of the Royal Astronomical Society. - : Oxford University Press - ISSN 0035-8711
Roč. 519, č. 4 (2023), s. 4951-4965Poč.str. 15 s. Forma vydání Online - E Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova black hole physics ; active galaxies ; X-rays Vědní obor RIV BN - Astronomie a nebeská mechanika, astrofyzika Obor OECD Astronomy (including astrophysics,space science) CEP GA18-00533S GA ČR - Grantová agentura ČR Způsob publikování Omezený přístup Institucionální podpora ASU-R - RVO:67985815 UT WOS 000927906300012 EID SCOPUS 85159860791 DOI 10.1093/mnras/stac3625 Anotace We study the Fourier time lags due to the Comptonization of disc-emitted photons in a spherical, uniform, and stationary X-ray corona, which located on the rotational axis of the black hole. We use MONK, a general relativistic Monte Carlo radiative transfer code, to calculate Compton scattering of photons emitted by a thin disc with a Novikov-Thorne temperature profile. We find that the model time lags due to Comptonization remain constant up to a characteristic frequency and then rapidly decrease to zero at higher frequencies. We provide equations that can be used to determine the time lags and cross-spectra for a wide range of values for the corona radius, temperature, optical depth, height, and for various accretion rates and black hole masses. We also provide an equation for the X-ray luminosity of a single corona, as a function of its characteristics and location above the disc. Remarkably, the observed X-ray time lags of nearby, bright active galaxies can be successfully reproduced by inverse Comptonization process of multiple dynamic coronae. Pracoviště Astronomický ústav Kontakt Radka Svašková, bibl@asu.cas.cz, Tel.: 323 620 326 Rok sběru 2024 Elektronická adresa https://doi.org/10.1093/mnras/stac3625
Počet záznamů: 1