Accretion disks heated by luminous central stars

Details Accretion disks heated by luminous central stars Accretion disks heated by luminous central stars

May 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...146..366f&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 146, no. 2, May 1985, p. 366-368.

Astronomy and Astrophysics

Astrophysics

60

Accretion Disks, Binary Stars, Cataclysmic Variables, Novae, Radiant Heating, Symbiotic Stars, Energy Distribution, Gravitational Fields, Stellar Radiation

Scientific paper

In certain cases heating of an accretion disk by radiation from a bright central star, can be more important than heating by dissipation of gravitational energy. Simple calculations have been performed, which indicate that the spectrum of radiation re-emitted by a disk heated in this way, can be similar to that of the classical Lynden-Bell law. The excessively high accretion rates deduced for some objects (some old novae, symbiotic stars, the luminous star S 22, etc...) assuming heating by gravitational dissipation, may be explained by the presence of excess heating due to the presence of a bright central star, which in the case of an old nova may not have returned to a quiescent state.

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