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A long life of excess : The interacting transient SN 2017hcc

A long life of excess : The interacting transient SN 2017hcc

Authors :
Moran, S.
Fraser, M.
Kotak, R.
Pastorello, A.
Benetti, S.
Brennan, S. J.
Gutiérrez, C. P.
Kankare, E.
Kuncarayakti, H.
Mattila, S.
Reynolds, T. M.
Anderson, J. P.
Brown, P. J.
Campana, S.
Chambers, K. C.
Chen, Ting-Wan
Della Valle, M.
Dennefeld, M.
Elias-Rosa, N.
Galbany, L.
Galindo-Guil, F. J.
Gromadzki, M.
Hiramatsu, D.
Inserra, C.
Leloudas, G.
Müller-Bravo, T. E.
Nicholl, M.
Reguitti, A.
Shahbandeh, M.
Smartt, S. J.
Tartaglia, L.
Young, D. R.
Moran, S.
Fraser, M.
Kotak, R.
Pastorello, A.
Benetti, S.
Brennan, S. J.
Gutiérrez, C. P.
Kankare, E.
Kuncarayakti, H.
Mattila, S.
Reynolds, T. M.
Anderson, J. P.
Brown, P. J.
Campana, S.
Chambers, K. C.
Chen, Ting-Wan
Della Valle, M.
Dennefeld, M.
Elias-Rosa, N.
Galbany, L.
Galindo-Guil, F. J.
Gromadzki, M.
Hiramatsu, D.
Inserra, C.
Leloudas, G.
Müller-Bravo, T. E.
Nicholl, M.
Reguitti, A.
Shahbandeh, M.
Smartt, S. J.
Tartaglia, L.
Young, D. R.
Publication Year :
2023

Abstract

In this study we present the results of a five-year follow-up campaign of the long-lived type IIn supernova SN 2017hcc, found in a spiral dwarf host of near-solar metallicity. The long rise time (57 ± 2 days, ATLAS o band) and high luminosity (peaking at −20.78 ± 0.01 mag in the ATLAS o band) point towards an interaction of massive ejecta with massive and dense circumstellar material (CSM). The evolution of SN 2017hcc is slow, both spectroscopically and photometrically, reminiscent of the long-lived type IIn, SN 2010jl. An infrared (IR) excess was apparent soon after the peak, and blueshifts were noticeable in the Balmer lines starting from a few hundred days, but appeared to be fading by around +1200 d. We posit that an IR light echo from pre-existing dust dominates at early times, with some possible condensation of new dust grains occurring at epochs ≳+800 d.

Details

Database :
OAIster
Notes :
English
Publication Type :
Electronic Resource
Accession number :
edsoai.on1400003895
Document Type :
Electronic Resource
Full Text :
https://doi.org/10.1051.0004-6361.202244565