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Supernova 2013fc in a circumnuclear ring of a luminous infrared galaxy: the big brother of SN 1998S

Kangas, T, Mattila, S, Kankare, E, Lundqvist, P, Vaeisaenen, P, Childress, M, Pignata, G, McCully, C, Valenti, S, Vinko, J, Pastorello, A, Elias-Rosa, N, Fraser, M, Gal-Yam, A, Kotak, R, Kotilainen, JK, Smartt, SJ, Galbany, L, Harmanen, J, Howell, DA , Inserra, C, Marion, GH, Quimby, RM, Silverman, JM, Szalai, T, Wheeler, JC, Ashall, C, Benetti, S, Romero-Canizales, C, Smith, KW, Sullivan, M, Takats, K and Young, DR (2016) Supernova 2013fc in a circumnuclear ring of a luminous infrared galaxy: the big brother of SN 1998S. Monthly Notices of the Royal Astronomical Society, 456 (1). pp. 323-346. ISSN 0035-8711

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We present photometric and spectroscopic observations of SN 2013fc, a bright type II supernova (SN) in a circumnuclear star-forming ring in the luminous infrared galaxy ESO 154-G010, observed as part of the Public ESO Spectroscopic Survey of Transient Objects. SN 2013fc is both photometrically and spectroscopically similar to the well-studied type IIn SN 1998S and to the bright type II-L SN 1979C. It exhibits an initial linear decline, followed by a short plateau phase and a tail phase with a decline too fast for 56Co decay with full γ-ray trapping. Initially, the spectrum was blue and featureless. Later on, a strong broad (∼8000 km s−1) H α emission profile became prominent. We apply a starlight stellar population model fit to the SN location (observed when the SN had faded) to estimate a high extinction of AV = 2.9 ± 0.2 mag and an age of
10 +3 −2
Myr for the underlying cluster. We compare the SN to SNe 1998S and 1979C and discuss its possible progenitor star considering the similarities to these events. With a peak brightness of B = −20.46 ± 0.21 mag, SN 2013fc is 0.9 mag brighter than SN 1998S and of comparable brightness to SN 1979C. We suggest that SN 2013fc was consistent with a massive red supergiant (RSG) progenitor. Recent mass loss probably due to a strong RSG wind created the circumstellar matter illuminated through its interaction with the SN ejecta. We also observe a near-infrared excess, possibly due to newly condensed dust.

Item Type: Article
Additional Information: This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
Uncontrolled Keywords: 0201 Astronomical And Space Sciences
Subjects: Q Science > QB Astronomy
Q Science > QC Physics
Divisions: Astrophysics Research Institute
Publisher: Oxford University Press
Related URLs:
Date Deposited: 17 Feb 2017 11:19
Last Modified: 03 Aug 2022 07:49
DOI or ID number: 10.1093/mnras/stv2567
URI: https://researchonline.ljmu.ac.uk/id/eprint/5555
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