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

Authors :: Valenti, S.
Fraser, M.
Benetti, S.
Pignata, G.
Sollerman, J.
Inserra, C.
Cappellaro, E.
Pastorello, A.
Smartt, S. J.
Ergon, M.
Botticella, M. T.
Brimacombe, J.
Bufano, F.
Crockett, M.
Eder, I.
Fugazza, D.
Haislip, J. B
Hamuy, M.
Harutyunyan, A.
Ivarsen, K. M.
Kankare, E.
Kotak, R.
LaCluyze, A. P.
Magill, L.
Mattila, S.
Maza, J.
Mazzali, P. A.
Reichart, D. E.
Taubenberger, S.
Turatto, M.
Zampieri., L.
Publication Year :: 2011
Abstract: 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.<br />Comment: 24 pages, 20 figures, MNRAS, accepted