SN 2011ht: Weak explosion in massive extended envelope

Abstract

A possibility is explored to account for the light curve and the low expansion velocity of the supernova SN~2011ht, a member of group of three objects showing signatures of both IIn and IIP supernovae. It is argued that the radiated energy and the expansion velocity are consistent with the low energy explosion ($\approx 6\times 10^{49}$ erg) and $\le 2M_{\odot }$ ejecta interacting with the circumstellar envelope of $6-8M_{\odot }$ and the radius of $2\times 10^{14}$ cm. The test of this scenario is proposed.

11 pages, 3 figures, accepted by Astronomy Letters

References in corpus (4)

• SN 1994W: An Interacting Supernova or Two Interacting Shells?
• SN 2011ht: Confirming a Class of Interacting Supernovae with Plateau Light Curves (Type IIn-P)
• SN 2009kn - the twin of the Type IIn supernova 1994W
• Parameters of type IIP SN 2012A and clumpiness effects

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• Explaining unusual line profiles of SN 2006gy