Transitional events in the spectrophotometric regime between stripped envelope and superluminous supernovae
Abstract
The division between stripped-envelope supernovae (SE-SNe) and superluminous supernovae (SLSNe) is not well defined in either photometric or spectroscopic space. While a sharp luminosity threshold has been suggested, there remains an increasing number of transitional objects that reach this threshold without the spectroscopic signatures common to SLSNe. In this work we present data and analysis on four SNe transitional between SE-SNe and SLSNe; the He-poor SNe 2019dwa and 2019cri, and the He-rich SNe 2019hge and 2019unb. Each object displays long-lived and variable photometric evolution with luminosities around the SLSN threshold of mag. Spectroscopically however, these objects are similar to SE-SNe, with line velocities lower than either SE-SNe and SLSNe, and thus represent an interesting case of rare transitional events.
Keywords
Cite
@article{arxiv.2109.14572,
title = {Transitional events in the spectrophotometric regime between stripped envelope and superluminous supernovae},
author = {S. J. Prentice and C. Inserra and S. Schulze and M. Nicholl and P. A. Mazzali and S. D. Vergani and L. Galbany and J. P. Anderson and C. Ashall and T. W. Chen and M. Deckers and M. Delgado Mancheño and R. González Díaz and S. González-Gaitán and M. Gromadzki and C. P. Gutiérrez and L. Harvey and A. Kozyreva and M. R. Magee and K. Maguire and T. E. Müller-Bravo and S. Muñoz Torres and P. J. Pessi and J. Sollerman and J. Teffs and J. H. Terwel and D. R. Young},
journal= {arXiv preprint arXiv:2109.14572},
year = {2021}
}
Comments
Accepted for publication in MNRAS