SN 2009jf: a slow-evolving stripped-envelope core-collapse supernova

Details SN 2009jf: a slow-evolving stripped-envelope core-collapse supernova SN 2009jf: a slow-evolving stripped-envelope core-collapse supernova

2011-06-15

arxiv.org/abs/1106.3030v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

24 pages, 20 figures, MNRAS, accepted

Scientific paper

We present an extensive set of photometric and spectroscopic data for SN 2009jf, a nearby Type Ib supernova, spanning from ~20 days before B-band maximum to one year after maximum. We show that SN 2009jf is a slow evolving and energetic stripped-envelope SN and is likely from a massive progenitor (25-30 solar masses). The large progenitor's mass allows us to explain the complete hydrogen plus helium stripping without invoking the presence of a binary companion. The supernova occurred close to a young cluster, in a crowded environment with ongoing star-formation. The specroscopic similarity with the He-poor Type Ic SN 2007gr suggests a common progenitor for some supernovae Ib and Ic. The nebular spectra of SN 2009jf are consistent with an asymmetric explosion, with an off-center dense core. We also find evidence that He-rich Ib supernovae have a rise time longer than other stripped-envelope supernovae, however confirmation of this result and further observations are needed.

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