EVLA Constraints on the Progenitors of Supernovae Type Ia

Details EVLA Constraints on the Progenitors of Supernovae Type Ia EVLA Constraints on the Progenitors of Supernovae Type Ia

Jan 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21730405c&link_type=abstract

American Astronomical Society, AAS Meeting #217, #304.05; Bulletin of the American Astronomical Society, Vol. 43, 2011

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Scientific paper

While Type Ia supernovae are used increasingly as cosmological probes to trace the expansion history of the Universe, the nature of their progenitors remains enshrouded in mystery. In the favored model for these explosions, a white dwarf accretes material from a hydrogen-rich donor star (e.g. red giant). A necessary implication of this model is the production of weak radio emission as the SN blastwave plows through the wind of the donor star. Previous radio searches for this signal have been unsuccessful, largely attributed to the fact that the expected emission lay just beyond the VLA sensitivity. Here we present recent results from our EVLA program, which utilizes the increased sensitivity to search for the expected signal from SNe Ia. The non-detection of radio emission with the EVLA would indicate double-degenerate progenitor systems (binary white dwarf) or require serious modifications to the single-degenerate model.

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