Evidence of an irradiated accretion disc in XTE J1818−245★
نویسندگان
چکیده
منابع مشابه
Evolution of transonicity in an accretion disc
For inviscid, rotational accretion flows driven by a general pseudoNewtonian potential on to a Schwarzschild black hole, the only possible fixed points are saddle points and centre-type points. For the specific choice of the Newtonian potential, the flow has only two critical points, of which the outer one is a saddle point while the inner one is a centre-type point. A restrictive upper bound i...
متن کاملThe Evolving Accretion Disc in the Black Hole X-ray Transient XTE J1859+226⋆
We present HST, RXTE, and UKIRT observations of the broad band spectra of the black hole X-ray transient XTE J1859+226 during the decline from its 1999–2000 outburst. Our UV spectra define the 2175 Å interstellar absorption feature very well and based on its strength we estimate E(B − V ) = 0.58 ± 0.12. Hence we deredden our spectra and follow the evolution of the spectral energy distribution o...
متن کاملThe very high state accretion disc structure from the Galactic black hole transient XTE J1550 564
The 1998 outburst of the bright Galactic black hole binary system XTE J1550 − 564 was used to constrain the accretion disc structure in the strongly Comptonized very high state spectra. These data show that the disc emission is not easily compatible with the constant area L ∝ T 4 behaviour seen during the thermal-dominated high/soft state and weakly Comptonized very high state. Even after corre...
متن کاملModeling an accretion disc stochastical variability
ABSTRACT Hot spots residing on the surface of an accretion disc have been considered as a model of short-term variability of active galactic nuclei. In this paper we apply the theory of random point processes to model the observed signal from an ensemble of randomly generated spots. The influence of general relativistic effects near a black hole is taken into account and it is shown that typica...
متن کاملStellar capture by an accretion disc
AB S TRACT The long-term evolution of a stellar orbit captured by a massive galactic centre via successive interactions with an accretion disc has been examined. An analytical solution describing the evolution of the stellar orbital parameters during the initial stage of the capture has been found. Our results are applicable to thin Keplerian discs with an arbitrary radial distribution of densi...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2011
ISSN: 0035-8711
DOI: 10.1111/j.1365-2966.2010.18125.x