@misc{10481/69922,
year = {2021},
month = {4},
url = {http://hdl.handle.net/10481/69922},
abstract = {We present the photometric and spectroscopic evolution of supernova (SN) 2019cad during the first similar to 100 d from explosion. Based on the light-curve morphology, we find that SN 2019cad resembles the double-peaked Type Ib/c SN 2005bf and the Type Ic PTF11mnb. Unlike those two objects, SN 2019cad also shows the initial peak in the redder bands. Inspection of the g-band light curve indicates the initial peak is reached in similar to 8 d, while the r-band peak occurred similar to 15 d post-explosion. A second and more prominent peak is reached in all bands at similar to 45 d past explosion, followed by a fast decline from similar to 60 d. During the first 30 d, the spectra of SN 2019cad show the typical features of a Type Ic SN, however, after 40 d, a blue continuum with prominent lines of Si II lambda 6355 and C II lambda 6580 is observed again. Comparing the bolometric light curve to hydrodynamical models, we find that SN 2019cad is consistent with a pre-SN mass of 11 M-circle dot, and an explosion energy of 3.5 x 10(51) erg. The light-curve morphology can be reproduced either by a double-peaked Ni-56 distribution with an external component of 0.041 M-circle dot, and an internal component of 0.3 M-circle dot or a double-peaked Ni-56 distribution plus magnetar model (P similar to 11 ms and B similar to 26 x 10(14) G). If SN 2019cad were to suffer from significant host reddening (which cannot be ruled out), the Ni-56 model would require extreme values, while the magnetar model would still be feasible.},
organization = {European Commission	615929},
organization = {UNRN	PI2018 40B696},
organization = {Ministry of Education, Universities and Research (MIUR)},
organization = {Research Projects of National Relevance (PRIN)	20179ZF5KS},
organization = {Science Foundation Ireland},
organization = {Magnus Ehrnrooth foundation},
organization = {Vilho, Yrjo and Kalle Vaisala Foundation of the Finnish academy of Science and Letters},
organization = {VILLUM FONDEN	13261	
28021},
organization = {Independent Research Fund Denmark - European Union'sHorizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant	839090},
organization = {National Science Foundation (NSF)	AST-1911225},
organization = {CONICYT PFCHA/DOCTORADOBECAS	CHILE/2017-72180113},
organization = {Spanish grant within the European Funds for Regional Development (FEDER)	PGC2018-095317-B-C21},
organization = {Instrument Centre for Danish Astrophysics (IDA)},
organization = {National Aeronautics & Space Administration (NASA)	NN12AR55G	
80NSSC18K0284	
80NSSC18K1575},
organization = {UK Research & Innovation (UKRI)},
organization = {Science & Technology Facilities Council (STFC)},
organization = {ANID -Millennium Science Initiative	ICN12 009},
organization = {Jenny and AnttiWihuri foundation},
organization = {ANID BECAS/DOCTORADO NACIONAL	21202412	
W19AN003},
publisher = {Oxford University Press},
keywords = {Supernovae: general},
keywords = {Supernovae: individual: SN 2019cad},
title = {The double-peaked type Ic Supernova 2019cad: another SN 2005bf-like object},
doi = {10.1093/mnras/stab1009},
author = {Gutiérrez, C. P. and Galbany González, Lluis},
}