Oscillations of the Eddington capture sphere

@article{43584,
   author = {Abramowicz, Marek and Wielgus, M.},
   article_location = {FR - Francouzská republika},
   article_number = {A123},
   doi = {http://dx.doi.org/10.1051/0004-6361/201220228},
   keywords = {Accretion; Accretion disks; Gravitation; Relativistic processes; Stars: neutron; X-rays: binaries},
   language = {eng},
   issn = {0004-6361},
   journal = {Astronomy & Astrophysics},
   title = {Oscillations of the Eddington capture sphere},
   url = {https://www.aanda.org/index.php?option=com_article&access=doi&doi=10.1051/0004-6361/201220228&Itemid=129},
   volume = {545},
   year = {2012}
}

TY  - JOUR
ID  - 43584
AU  - Abramowicz, Marek - Wielgus, M.
PY  - 2012
TI  - Oscillations of the Eddington capture sphere
JF  - Astronomy & Astrophysics
VL  - 545
IS  - A123
SN  - 00046361
KW  - Accretion
KW  - Accretion disks
KW  - Gravitation
KW  - Relativistic processes
KW  - Stars: neutron
KW  - X-rays: binaries
UR  - https://www.aanda.org/index.php?option=com_article&access=doi&doi=10.1051/0004-6361/201220228&Itemid=129
N2  - We present a toy model of mildly super-Eddington, optically thin accretion onto a compact star in the Schwarzschild metric, which predicts periodic variations of luminosity when matter is supplied to the system at a constant accretion rate. These are related to the periodic appearance and disappearance of the Eddington capture sphere. In the model the frequency is found to vary inversely with the luminosity. If the input accretion rate varies (strictly) periodically, the luminosity variation is quasi-periodic, and the quality factor is inversely proportional to the relative amplitude of mass accretion fluctuations, with its largest value Q approximate to 1/(10|delta(M)over dot/(M)over dot|) attained in oscillations at about 1 to 2 kHz frequencies for a2 M-circle dot star.
ER  - 

ABRAMOWICZ, Marek a M. WIELGUS. Oscillations of the Eddington capture sphere. \textit{Astronomy \&{} Astrophysics}. FR - Francouzská republika, 2012, roč.~545, A123, 3 s. ISSN~0004-6361. Dostupné z: https://dx.doi.org/10.1051/0004-6361/201220228.