TIME-DEPENDENT DISK ACCRETION IN BINARY SYSTEMS

Автор(и)

  • G. V. Lipunova Sternberg Astronomical Institute, Moscow State University, Universitetskii pr. 13, Moscow, 119899 Russia, Russian Federation
  • N. I. Shakura Sternberg Astronomical Institute, Moscow State University, Universitetskii pr. 13, Moscow, 119899 Russia; Max-Planck-Institut fur Astrophysik, Karl-Schwarzschild-Str. 1, 85740 Garching, Germany, Russian Federation

DOI:

https://doi.org/10.18524/1810-4215.1999.12.93090

Ключові слова:

Stars, binary, novae, cataclysmic variables, X-rays, bursts, stars, individual, A 0620-00

Анотація

The analytic investigation of time dependent accretion in disk is carried out. We consider a disk in a binary system at outburst which has fixed tidally truncated outer radius. The standard model (Shakura-Sunyaev 1973) of the disk is considered. The fully analytic solutions in two different opacity regimes are characterized by power-law variations of accretion rate with time. The solutions supply asymptotic description of the disk evolution after the peak of outburst while the disk is fully ionized. The X-ray flux of multicolor (black-body) α-disk is obtained to vary quasi-exponentially. The application to X-ray novae is briefly discussed concerning observed faster-than-power decays of X-ray light curves. The case of time dependent advective disk is mentioned.

Посилання

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Опубліковано

2017-03-16

Номер

Том 12 (1999)

Розділ

Статті

Ліцензія

Авторське право (c) 2017 Odessa Astronomical Publications

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Ця робота ліцензується відповідно до Creative Commons Attribution-NonCommercial 4.0 International License.

Відповідно Закону України про авторське право і суміжні права N 3792-XII від 23 грудня 1993 року