Prentice, SJ, Inserra, C, Schulze, S, Nicholl, M, Mazzali, PA, Vergani, SD, Galbany, L, Anderson, JP, Ashall, C, Chen, TW, Deckers, M, Delgado Mancheño, M, González Díaz, R, González-Gaitán, S, Gromadzki, M, Gutiérrez, CP, Harvey, L, Kozyreva, A, Magee, MR, Maguire, K et al, Müller-Bravo, TE, Muñoz Torres, S, Pessi, PJ, Sollerman, J, Teffs, J, Terwel, JH and Young, DR (2021) Transitional events in the spectrophotometric regime between stripped envelope and superluminous supernovae. Monthly Notices of the Royal Astronomical Society, 508 (3). pp. 4342-4358. ISSN 0035-8711

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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 Mr < -19.8 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.

Item Type:	Article
Additional Information:	This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2021 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
Uncontrolled Keywords:	0201 Astronomical and Space Sciences; Astronomy & Astrophysics
Subjects:	Q Science > QB Astronomy Q Science > QC Physics
Divisions:	Astrophysics Research Institute
Publisher:	Oxford University Press (OUP)
SWORD Depositor:	A Symplectic
Date Deposited:	02 Nov 2022 10:37
Last Modified:	02 Nov 2022 10:37
DOI or ID number:	10.1093/mnras/stab2864
URI:	https://researchonline.ljmu.ac.uk/id/eprint/17989

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