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Published July 20, 2006 | Published + Erratum
Journal Article Open

A Search for Radio Emission from Type Ia Supernovae


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 σ upper limits to a steady mass-loss rate for individual SN systems as low as ~3 × 10^(-8) M_☉ yr^(-1), which argues 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.

Additional Information

© 2006 American Astronomical Society. Received 2006 February 21; accepted 2006 March 29. K. W. W. thanks the Office of Naval Research for the 6.1 funding supporting this research. C. J. S. is a Cottrell Scholar of Research Corporation and work on this project has been supported by the NASA Wisconsin Space Grant Consortium. Additional information and data on RSNe can be found at http://rsdwww.nrl.navy.mil/7210/7213/index.htm and linked pages.

Attached Files

Published - PANapj06c.pdf

Erratum - PANapj06c_Erratum.pdf


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