Merging of Components in Close Binaries: Type Ia Supernovae, Massive White Dwarfs, and Ap stars

Abstract

The "Scenario Machine" (a computer code designed for studies of the evolution of close binaries) was used to carry out a population synthesis for a wide range of merging astrophysical objects: main-sequence stars with main-sequence stars; white dwarfs with white dwarfs, neutron stars, and black holes; neutron stars with neutron stars and black holes; and black holes with black holes.We calculate the rates of such events, and plot the mass distributions for merging white dwarfs and main-sequence stars. It is shown that Type Ia supernovae can be used as standard candles only after approximately one billion years of evolution of galaxies. In the course of this evolution, the average energy of Type Ia supernovae should decrease by roughly 10%; the maximum and minimum energies of Type Ia supernovae may differ by no less than by a factor of 1.5. This circumstance should be taken into account in estimations of parameters of acceleration of the Universe. According to theoretical estimates, the most massive - as a rule, magnetic - white dwarfs probably originate from mergers of white dwarfs of lower mass. At least some magnetic Ap and Bp stars may form in mergers of low-mass main sequence stars (<1.5 mass of the Sun) with convective envelopes.

15 pages, 4 figures

References in corpus (6)

• Remnant evolution after a carbon-oxygen white dwarf merger
• A recoiling supermassive black hole in the quasar SDSSJ092712.65+294344.0?
• The underluminous Type Ia Supernova 2005bl and the class of objects similar to SN 1991bg
• Supernova progenitors and iron density evolution from SN rate evolution measurements
• The radial distribution of type Ia supernovae in early-type galaxies: implications for progenitor scenarios
• Multi-dimensional numerical simulations of type Ia supernova explosions

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