OGLE-2014-SN-073 as a fallback accretion powered supernova

TL;DR

This paper explores whether the energetic supernova OGLE-2014-SN-073 was powered by fallback accretion after a failed explosion, suggesting some failed supernovae can appear as bright events.

Contribution

It demonstrates that fallback accretion models can reproduce the observed properties of OGLE-2014-SN-073, offering a new perspective on failed supernovae.

Findings

Fallback accretion can power energetic supernovae like OGLE-2014-SN-073.

Some failed supernovae may be observed as bright supernovae.

Fallback accretion models match the observed light curve of OGLE-2014-SN-073.

Abstract

We investigate the possibility that the energetic Type II supernova OGLE-2014-SN-073 is powered by a fallback accretion following the failed explosion of a massive star. Taking massive hydrogen-rich supernova progenitor models, we estimate the fallback accretion rate and calculate the light curve evolution of supernovae powered by the fallback accretion. We find that such fallback accretion powered models can reproduce the overall observational properties of OGLE-2014-SN-073. It may imply that some failed supernovae could be observed as energetic supernovae like OGLE-2014-SN-073 instead of faint supernovae as previously proposed.