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Title:
A Search for Radio Emission from Type Ia Supernovae
Authors:
Panagia, Nino; Van Dyk, Schuyler D.; Weiler, Kurt W.; Sramek, Richard A.; Stockdale, Christopher J.; Murata, Kimberly P.
Affiliation:
AA(Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218; .; Istituto Nazionale di Astrofisica (INAF), Rome, Italy; and Supernova Ltd., Virgin Gorda, British Virgin Islands.), AB(Spitzer Science Center, California Institute of Technology, Pasadena, CA 91125; .), AC(Naval Research Laboratory, Code 7213, Washington, DC 20375-5320 .), AD(National Radio Astronomy Observatory, P.O. Box O, Socorro, NM 87801; .), AE(Department of Physics, Marquette University, P.O. Box 1881, Milwaukee, WI 53201-1881 .), AF(9031 Ashmeade Drive, Fairfax, VA 22032; .)
Publication:
The Astrophysical Journal, Volume 646, Issue 1, pp. 369-377. (ApJ Homepage)
Publication Date:
07/2006
Origin:
UCP
ApJ Keywords:
Stars: Binaries: Close, Stars: Binaries: Symbiotic, Radio Continuum: Stars, Stars: Mass Loss, Stars: Supernovae: General, Stars: White Dwarfs
DOI:
10.1086/504710
Bibliographic Code:
2006ApJ...646..369P

Abstract

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 Msolar 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.
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