Bt-Monocerotis - an Eclipsing Nova

Details Bt-Monocerotis - an Eclipsing Nova Bt-Monocerotis - an Eclipsing Nova

Mar 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...254..646r&link_type=abstract

Astrophysical Journal, Vol.254, P. 646, 1982

Astronomy and Astrophysics

Astrophysics

24

Scientific paper

Our photometric observations of BT Mon (=Nova Mon 1939) demonstrate that it is an eclipsing binary system with an orbital period of 0.3338141 days. We show that the accretion disk in BT Mon is exceptionally large and luminous. Its radius is within 60% of the radius of its Roche lobe and is at least 3 times larger than the radius of a zero-viscosity disk; and its absolute visual magnitude is 4.0±1.0, which requires a mass flux greater than 2 × 10-8 Msun yr-1. The late-type star in BT Mon cannot simultaneously fit a main-sequence mass-radius relation and a main-sequence mass-luminosity relation, in the sense that it is underluminous for a normal main-sequence star.

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