Binary Evolution of Type Ia Supernovae

Details Binary Evolution of Type Ia Supernovae Binary Evolution of Type Ia Supernovae

1995-12-30

arxiv.org/abs/astro-ph/9512171v1

Astronomy and Astrophysics

Astrophysics

LaTex 19 pages, to appear in Evolutionary Processes in Binary Stars (NATO ASI) eds R. A. M. J. Wijers, M. B. Davies, and C. A.

Scientific paper

Observations of Type Ia supernovae (SN~Ia) combined with modeling of dynamics, light curves and spectra continue to point to the difficult conclusion that SN~Ia result from degenerate ignition in a carbon/oxygen white dwarf of the Chandrasekhar mass. Such a model accounts well for the ``normal" SN~Ia and for the observed dispersion exemplified by the light curve amplitude-shape relation. The criterion that the white dwarfs involved in this process grow to nearly 1.4 Msun continues to provide a great challenge to understanding the binary stellar evolution involved. The so-called ``supersoft X-ray sources" may provide an important new population of SN~Ia progenitors. Other techniques are being developed that may constrain the binary evolution.

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