A Search for Radio Emission from Type Ia Supernovae

Details A Search for Radio Emission from Type Ia Supernovae A Search for Radio Emission from Type Ia Supernovae

2006-03-30

arxiv.org/abs/astro-ph/0603808v1

Astrophys.J.646:369-377,2006; Erratum-ibid.733:72,2011

Astronomy and Astrophysics

Astrophysics

11 pages, 2 figures, to appear in ApJ

Scientific paper

10.1086/504710 10.1088/0004-637X

We present and discuss the radio observations of 27 Type Ia supernovae (SNe Ia) observed over two decades with the Very Large Array. No SN Ia has been detected so far in the radio, implying a very low density for any possible circumstellar material established by the progenitor, or progenitor system, before explosion. We derive 2-sigma upper limits to a steady mass-loss rate for individual SN systems as low as ~3 X 10^{-8} Msun yr^{-1}, discriminating strongly against white dwarf accretion via a stellar wind from a massive binary companion in the symbiotic star, an example of the ``single degenerate'' scenario. However, a white dwarf accreting from a relatively low mass companion via a sufficiently high efficiency (>60-80%), Roche lobe overflow is still consistent with our limits. The ``double degenerate'' merger scenario also cannot be excluded.

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