@misc{10481/71176,
year = {2021},
month = {6},
url = {http://hdl.handle.net/10481/71176},
abstract = {Stripped-envelope supernovae (SE-SNe) show a wide variety of photometric and spectroscopic properties. This is due to the
different potential formation channels and the stripping mechanism that allows for a large diversity within the progenitors
outer envelope compositions. Here, the photometric and spectroscopic observations of SN 2020cpg covering ∼130 d from the
explosion date are presented. SN 2020cpg (z = 0.037) is a bright SE-SNe with the B-band peaking at MB = −17.75 ± 0.39
mag and a maximum pseudo-bolometric luminosity of Lmax = 6.03 ± 0.01 × 1042 erg s−1. Spectroscopically, SN2020cpg
displays a weak high- and low-velocity H α feature during the photospheric phase of its evolution, suggesting that it contained
a detached hydrogen envelope prior to explosion. From comparisons with spectral models, the mass of hydrogen within the
outer envelope was constrained to be ∼0.1 M . From the pseudo-bolometric light curve of SN 2020cpg a 56Ni mass of MNi ∼
0.27 ± 0.08M  was determined using an Arnett-like model. The ejecta mass and kinetic energy of SN 2020cpg were determined
using an alternative method that compares the light curve of SN 2020cpg and several modelled SE-SNe, resulting in an ejecta
mass of Mejc ∼ 5.5 ± 2.0 M  and a kinetic energy of EK ∼ 9.0 ± 3.0 × 1051 erg. The ejected mass indicates a progenitor mass
of 18−25 M . The use of the comparative light curve method provides an alternative process to the commonly used Arnett-like
model to determine the physical properties of SE-SNe.},
organization = {H2020 ERC	758638},
organization = {UK Research & Innovation (UKRI)},
organization = {Science & Technology Facilities Council (STFC)	R27610},
organization = {European Southern Observatory (ESO)	1103.D-0328(J)},
organization = {European Commission	H2020-MSCA-IF-2018-842471	
839090	
730890	
PGC2018-095317-B-C21},
organization = {Polish National Science Center (NCN) MAESTRO	2014/14/A/ST9/00121},
organization = {CONICYT PFCHA/DOCTORADOBECAS	CHILE/2017-72180113},
organization = {Royal Astronomical Society Research Fellowship},
organization = {National Science Foundation (NSF)	AST-1911225	
AST-1911151},
organization = {UK Research & Innovation (UKRI)},
organization = {Science & Technology Facilities Council (STFC)},
organization = {National Aeronautics & Space Administration (NASA)	NN12AR55G	
80NSSC18K0284	
80NSSC18K1575},
organization = {ESO programme	1103.D-0328},
publisher = {Oxford University Press},
keywords = {Supernovae: general},
keywords = {Supernovae: individual (SN 2020cpg)},
title = {SN 2020cpg: an energetic link between Type IIb and Ib supernovae},
doi = {10.1093/mnras/stab1761},
author = {Medler, K. and Galbany González, Lluis},
}