Results 21 to 30 of about 491,052 (394)
Winds can ‘blow up’ AGN accretion disc sizes [PDF]
Monthly notices of the Royal Astronomical Society, 2018 Recent multi-band variability studies have revealed that active galactic nucleus (AGN) accretion disc sizes are generally larger than the predictions of the classical thin disc by a factor of $2\sim 3$.
Mouyuan Sun +3 more
semanticscholar +1 more source
Eccentric accretion discs [PDF]
Monthly Notices of the Royal Astronomical Society, 1994 We obtain evolutionary equations for non-stationary viscous accretion discs in which particles are orbiting along Keplerian ellipses that are slowly drifting towards the centre. It is shown that, for any reasonable viscosity law, stationary accretion is possible, with all orbiting particles moving with the same eccentricity.
Yu. E. Lyubarskij +2 more
openaire +1 more source
Dust inflated accretion disc as the origin of the broad line region in active galactic nuclei [PDF]
, 2017 The Broad Line Region (BLR) in AGN is composed of dense gas ($\sim 10^{11}$ cm$^{-3}$) on sub-pc scale, which absorbs about 30 per cent of the ionising continuum.
A. Baskin, A. Laor
semanticscholar +1 more source
Phase-resolved optical and X-ray spectroscopy of low-mass X-ray binary X1822-371 [PDF]
, 2012 (Abridged) X1822-371 is the prototypical accretion disc corona X-ray source, a low-mass X-ray binary viewed at very high inclination, thereby allowing the disc structure and extended disc coronal regions to be visible.
A. Somero +38 more
core +3 more sources
A large accretion disc of extreme eccentricity in the TDE ASASSN-14li [PDF]
Monthly notices of the Royal Astronomical Society, 2018 In the canonical model for tidal disruption events (TDEs), the stellar debris circularizes quickly to form an accretion disk of size about twice the orbital pericenter of the star.
R. Cao +4 more
semanticscholar +1 more source
ACCRETION DISCS AROUND BLACK HOLES: DEVELOPEMENT OF THEORY
Odessa Astronomical Publications, 2017 Standard accretion disk theory is formulated which is based on the local heat balance. The energy produced by a turbulent viscous heating is supposed to be emitted to the sides of the disc.
G. S. Bisnovatyi-Kogan
doaj +1 more source
Odessa Astronomical Publications, 2016 In this study, the models of slaved precession of accretion disc and donors radiationdriven wind were performed using three-dimensional numerical astrophysical methods by the example of microquasar Cyg X-1. As is shown, in the course of precession of the
V. V. Nazarenko, S. V. Nazarenko
doaj +1 more source
Long-term evolution of accretion discs in Be/X-ray binaries [PDF]
, 2006 We numerically study the long-term evolution of the accretion disc around the neutron star in a coplanar Be/X-ray binary with a short period and a moderate eccentricity. From three dimensional Smoothed Particle Hydrodynamics simulations, we find that the
Hayasaki, K., Okazaki, Atsuo T.
core +3 more sources
Accretion Disc Theory: From the Standard Model Until Advection [PDF]
, 1998 Accretion disc theory was first developed as a theory with the local heat balance, where the whole energy produced by a viscous heating was emitted to the sides of the disc.
AC Fabian +35 more
core +3 more sources
Probing the geometry and motion of AGN coronae through accretion disc emissivity profiles [PDF]
, 2017 To gain a better understanding of the inner disc region that comprises active galactic nuclei it is necessary to understand the pattern in which the disc is illuminated (the emissivity profile) by X-rays emitted from the continuum source above the black ...
A. Gonzalez, D. Wilkins, L. Gallo
semanticscholar +1 more source