Authors
Y-Z Cai, A Pastorello, M Fraser, MT Botticella, N Elias-Rosa, L-Z Wang, R Kotak, S Benetti, E Cappellaro, M Turatto, A Reguitti, S Mattila, SJ Smartt, C Ashall, S Benitez, T-W Chen, A Harutyunyan, E Kankare, Peter Lundqvist, PA Mazzali, A Morales-Garoffolo, P Ochner, G Pignata, SJ Prentice, TM Reynolds, X-W Shu, MD Stritzinger, L Tartaglia, G Terreran, L Tomasella, S Valenti, G Valerin, G-J Wang, X-F Wang, L Borsato, E Callis, G Cannizzaro, S Chen, Enrico Congiu, Mattias Ergon, L Galbany, A Gal-Yam, X Gao, M Gromadzki, S Holmbo, F Huang, C Inserra, K Itagaki, Z Kostrzewa-Rutkowska, K Maguire, S Margheim, S Moran, F Onori, A Sagues Carracedo, KW Smith, Jesper Sollerman, A Somero, B Wang, DR Young
Publication date
2021/10/1
Journal
Astronomy & Astrophysics
Volume
654
Pages
A157
Publisher
EDP Sciences
Description
We present the spectroscopic and photometric study of five intermediate-luminosity red transients (ILRTs), namely AT 2010dn, AT 2012jc, AT 2013la, AT 2013lb, and AT 2018aes. They share common observational properties and belong to a family of objects similar to the prototypical ILRT SN 2008S. These events have a rise time that is less than 15 days and absolute peak magnitudes of between −11.5 and −14.5 mag. Their pseudo-bolometric light curves peak in the range 0.5–9.0 × 1040 erg s−1 and their total radiated energies are on the order of (0.3–3) × 1047 erg. After maximum brightness, the light curves show a monotonic decline or a plateau, resembling those of faint supernovae IIL or IIP, respectively. At late phases, the light curves flatten, roughly following the slope of the 56Co decay. If the late-time power source is indeed radioactive decay, these transients produce 56Ni masses on the order of 10−4 …
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YZ Cai, A Pastorello, M Fraser, MT Botticella… - Astronomy & Astrophysics, 2021