Supernova progenitor constraints from circumstellar interaction: Type Ia

Details Supernova progenitor constraints from circumstellar interaction: Type Ia Supernova progenitor constraints from circumstellar interaction: Type Ia

1996-10-03

arxiv.org/abs/astro-ph/9610022v1

Astronomy and Astrophysics

Astrophysics

4 pages, LaTeX, 3 Postscript figures, cupconf.sty

Scientific paper

Searching for the presence of a circumstellar medium is a direct observational way to discriminate between different types of progenitor systems for Type Ia supernovae. We have modeled whether such gas may give rise to detectable emission, especially in H-alpha, and compare the models with observations of SN 1994D. We obtain a mass loss rate less than about 2.5 10^{-5} solar masses per year for a wind speed of 10 km/s. We find that X-ray observations in the range 5-10 keV, e.g., with AXAF, provide the most useful limits on the mass loss, while high-resolution optical spectroscopy offers the only direct way of identifying circumstellar hydrogen.

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