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.
@article{arxiv.1106.3030,
title = {SN 2009jf: a slow-evolving stripped-envelope core-collapse supernova},
author = {S. Valenti and M. Fraser and S. Benetti and G. Pignata and J. Sollerman and C. Inserra and E. Cappellaro and A. Pastorello and S. J. Smartt and M. Ergon and M. T. Botticella and J. Brimacombe and F. Bufano and M. Crockett and I. Eder and D. Fugazza and J. B Haislip and M. Hamuy and A. Harutyunyan and K. M. Ivarsen and E. Kankare and R. Kotak and A. P. LaCluyze and L. Magill and S. Mattila and J. Maza and P. A. Mazzali and D. E. Reichart and S. Taubenberger and M. Turatto and L. Zampieri.},
journal= {arXiv preprint arXiv:1106.3030},
year = {2015}
}