Statistics – Computation
Scientific paper
Mar 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...370..324a&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 370, March 20, 1991, p. 324-329. Research supported by Alfred P. Sloan Foun
Statistics
Computation
5
Binary Stars, Stellar Envelopes, Supernovae, White Dwarf Stars, Astronomical Catalogs, Computational Astrophysics, Hydrogen, Stellar Atmospheres, Stellar Luminosity, Stellar Mass Accretion
Scientific paper
Common envelope binaries in which a white dwarf stably burns hydrogen accreted from an evolved companion have recently been proposed as the progenitors of type Ia supernovae. The paper examines this scenario and finds difficulties with it. The supernova explosion itself will strip the hydrogen-rich envelope off the evolved companion and contaminate the ejecta with a mass fraction X(H) greater than about 0.1 of hydrogen, which is at least a factor of 5 larger than the upper limit for SN 1981 B. The luminosity, contact binary Roche geometry, and supernova rate required in the scenario demand that greater than about 10 percent of all stars more luminous than 10 to the 38th ergs/s be unidentified eclipsing variables with periods in the range 3-1000 days. The Yale Bright Star Catalog should contain 2-15 such objects, and the Henry Draper Catalog should contain 6-40 of them. The fact that no object with the predicted properties is known while dozens are predicted to exist in well-studied catalogs of bright stars is a serious problem for the scenario.
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