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

TL;DR

SN 2009jf is a slow-evolving, energetic Type Ib supernova from a massive progenitor, with evidence of asymmetric explosion and similarities to Type Ic supernovae, providing insights into progenitor characteristics and explosion mechanisms.

Contribution

This study provides detailed photometric and spectroscopic data for SN 2009jf, revealing its slow evolution, high energy, and implications for progenitor mass and explosion asymmetry, advancing understanding of stripped-envelope supernovae.

Findings

SN 2009jf is a slow-evolving, energetic supernova.

Progenitor mass estimated at 25-30 solar masses.

Evidence of asymmetric explosion with off-center dense core.

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.