Testing slim-disk models on the thermal spectra of LMC X-3

Дата и время публикации : 2011-05-31T20:00:24Z

Авторы публикации и институты :
Odele Straub
Michal Bursa
Aleksander Sadowski
James F. Steiner
Marek A. Abramowicz
Wlodzimierz Kluzniak
Jeffrey E. McClintock
Ramesh Narayan
Ronald A. Remillard

Ссылка на журнал-издание: Astronomy & Astrophysics, 2011, Volume 533, id.A67, 6 pp
Коментарии к cтатье: 6 pages, 5 figures, submitted to A&A
Первичная категория: astro-ph.SR

Все категории : astro-ph.SR

Краткий обзор статьи: Slim-disk models describe accretion flows at high luminosities, while reducing to the standard thin disk form in the low luminosity limit. We have developed a new spectral model, slimbb, within the framework of XSPEC, which describes fully relativistic slim-disk accretion and includes photon ray-tracing that starts from the disk photosphere, rather than the equatorial plane. We demonstrate the features of this model by applying it to RXTE spectra of the persistent black-hole X-ray binary LMC X-3. LMC X-3 has the virtues of exhibiting large intensity variations while maintaining itself in soft spectral states which are well described using accretion-disk models, making it an ideal candidate to test the aptness of slimbb. Our results demonstrate consistency between the low-luminosity (thin-disk) and high luminosity (slim-disk) regimes. We also show that X-ray continuum-fitting in the high accretion rate regime can powerfully test black-hole accretion disk models.

Category: Physics