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@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.
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