Evolution of the number of accreting white dwarfs with shell nuclear burning and of occurrence rate of SN Ia

Astronomy and Astrophysics – Astrophysics – High Energy Astrophysical Phenomena

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

11 pages, 2 figures, accepted by Astronomy Letters

Scientific paper

We analyze temporal evolution of the number of accreting white dwarfs with shell hydrogen burning in semidetached and detached binaries. We consider a stellar system in which star formation lasts for 10 Gyr with a constant rate, as well as a system in which the same amount of stars is formed in a single burst lasting for 1 Gyr. Evolution of the number of white dwarfs is confronted to the evolution of occurrence rate of events that usually are identified with SN Ia or accretion-induced collapses, i.e. with accumulation of Chandrasekhar mass by a white dwarf or a merger of a pair of CO white dwarfs with total mass not lower than the Chandrasekhar one. In the systems with a burst of star formation, at $t=$10 Gyr observed supersoft X-ray sources, most probably, are not precursors of SN Ia. The same is true for an overwhelming majority of the sources in the systems with constant star formation rate. In the systems of both kinds mergers of white dwarfs is the dominant SN Ia scenario. In symbiotic binaries, accreting CO-dwarfs do not accumulate enough mass for SN Ia explosion, while ONeMg-dwarfs finish their evolution by an accretion-induced collapse with formation of a neutron star.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Evolution of the number of accreting white dwarfs with shell nuclear burning and of occurrence rate of SN Ia 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 the number of accreting white dwarfs with shell nuclear burning and of occurrence rate of SN Ia, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Evolution of the number of accreting white dwarfs with shell nuclear burning and of occurrence rate of SN Ia will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-277560

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.