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Type Ia Supernovae in semi-detached binary systems | | A. V. Fedorova
; A. V. Tutukov
; L. R. Yungelson
; | | Date: |
2 Sep 2003 | | Journal: | Astron.Lett. 30 (2004) 73-85 | | Subject: | astro-ph | | Abstract: | We have considered scenarios for the evolution of close binaries resulting in the formation of semi-detached systems in which a white dwarf can accumulate Chandrasekhar mass by accretion from a main-sequence or subgiant companion with $Msim 2 M_odot$. These white dwarfs, probably, explode as type Ia supernovae or collapse with formation of neutron stars. We have carried out a population synthesis study for these systems and have estimated the occurrence rate of such events in the Galaxy, depending on the parameter of common envelopes, mass-exchange rate in the binary, reaction of the main-sequence component on accretion of helium in the intervening phase of evolution. We have found that the model occurrence rate of SNe Ia in semi-detached systems is $simeq 0.2 imes 10^{-3}$ yr$^{-1}$, i. e., it does not exceed $sim 10%$ of the observational estimate of the Galactic occurrence rate of SNe Ia. | | Source: | arXiv, astro-ph/0309052 | | Services: | Forum | Review | PDF | Favorites | |
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