An Observational Limit on Circumstellar H-Alpha from Supernova 1994D

R.J. Cumming , P. Lundqvist , L.J. Smith , M. Pettini , D.L. King

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classification 🌌 astro-ph

keywords limitalphabeforecircumstellarcompetitivedaysestimateexcludes

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We searched for narrow H$\alpha$ in a high-resolution spectrum of SN 1994D taken 10 days before maximum, and found none. We estimate the limit this places on the progenitor mass loss, and find that it is competitive with recent radio limits, and excludes the highest-mass-loss-rate symbiotic systems as possible progenitors of the normal Type Ia SN 1994D.

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An Observational Limit on Circumstellar H-Alpha from Supernova 1994D

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