Evolution of white dwarf binaries: supersoft X-ray sources and progenitors of type IA supernovae.

Details Evolution of white dwarf binaries: supersoft X-ray sources and progenitors of type IA supernovae. Evolution of white dwarf binaries: supersoft X-ray sources and progenitors of type IA supernovae.

Jun 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997a%26a...322l...9l&link_type=abstract

Astronomy and Astrophysics, v.322, p.L9-L12

Astronomy and Astrophysics

Astrophysics

126

Binaries: Close, Stars: Mass Loss, Supernovae: General

Scientific paper

The discovery of supersoft X-ray sources, described as massive white dwarfs burning accreted matter from their (more massive) companions, opens a new channel to type Ia supernovae (SNe Ia). According to conventional binary evolutionary theory, if the mass ratio of the donor to the white dwarf exceeds a critical value, the mass transfer becomes unstable, and a common envelope will be formed. However, recent calculations by Hachisu, Kato & Nomoto (1996ApJ...470L..97H) suggest a strong wind to stabilize the mass transfer when the mass transfer rate is higher than a certain value. Adopting the strong wind assumption, we have performed evolutionary calculations of white dwarf binaries, in which mass transfer occurs through Roche-lobe overflow, to search for the progenitors of SNe Ia. We find that there are two types of systems that can produce SNe Ia. One is close binaries with ~2 to ~3.5Msun_ main-sequence or subgiant companions, and the initial orbital period of several tenth of a day to several days. The other is wide binaries with low-mass (~1Msun_) red giant companions and long initial orbital period (tens to hundreds of days). The derived birth rate of SNe Ia in the Galaxy is roughly consistent with the observed one.

Affiliated with

Also associated with

No associations

Rating

Evolution of white dwarf binaries: supersoft X-ray sources and progenitors of type IA supernovae. does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Evolution of white dwarf binaries: supersoft X-ray sources and progenitors of type IA supernovae., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Evolution of white dwarf binaries: supersoft X-ray sources and progenitors of type IA supernovae. will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1471918