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

Understand

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.