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

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

1995-12-18

arxiv.org/abs/astro-ph/9512112v1

Astronomy and Astrophysics

Astrophysics

7 pages PostScript, to appear in Proceedings of the NATO Advanced Study Institute on Thermonuclear Supernovae, eds. R. Canal,

Scientific paper

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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