Rapid mass accretion in the symbiotic star AG DRA

Details Rapid mass accretion in the symbiotic star AG DRA Rapid mass accretion in the symbiotic star AG DRA

Mar 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987ap%26ss.131..759i&link_type=abstract

(IAU, Colloquium on Cataclysmic Variables. Recent Multi-Frequency Observations and Theoretical Developments, 93rd, Bamberg, West

Astronomy and Astrophysics

Astrophysics

3

Eclipsing Binary Stars, Hot Stars, Stellar Mass Accretion, Stellar Models, Symbiotic Stars, White Dwarf Stars, Hydrogen, Stellar Magnitude

Scientific paper

The mass accretion process onto the hot component of AG Dra (which data suggest is a white dwarf with mass greater than 1 solar mass) and its explosive phenomena are considered. An estimation for the mass accretion rate of about 10 to the -7th solar masses/yr is obtained. Many properties of the explosive phenomena of AG Dra may be explained by a model of mild hydrogen flashes on a massive white dwarf. Discrepancies between observations and sequence A of the model of Sion et al. (1979) are discussed, including the derived luminosity being one order of magnitude lower than that of the hydrogen flash model, and the observation of at least two outbursts per period being twice that predicted by the model.

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