Supernova 2013fc in a circumnuclear ring of a luminous infrared galaxy: the big brother of SN 1998S
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2016Metadata
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Kangas, T.
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Supernova 2013fc in a circumnuclear ring of a luminous infrared galaxy: the big brother of SN 1998S
Author
- Kangas, T.;
- Mattila, S.;
- Kankare, E.;
- Lundqvist, P.;
- Vaeisaenen, P.;
- Childress, M.;
- Pignata Libralato, Giuliano;
- McCully, C.;
- Valenti, S.;
- Vinkó, J.;
- Pastorello, A.;
- Elias Rosa, N.;
- Fraser, M.;
- Gal Yam, Avishay;
- Kotak, R.;
- Kotilainen, J. K.;
- Smartt, S. J.;
- Galbany, Lluis;
- Harmanen, J.;
- Howell, D. A.;
- Inserra, C.;
- Marion, G. H.;
- Quimby, R. M.;
- Silverman, J. M.;
- Szalai, T.;
- Wheeler, J. C.;
- Ashall, C.;
- Benetti, S.;
- Romero Cañizales, C.;
- Smith, K. W.;
- Sullivan, M.;
- Takáts, K.;
- Young, D. R.;
Abstract
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 Co-56 decay with full. gamma-ray trapping. Initially, the spectrum was blue and featureless. Later on, a strong broad (similar to 8000 km s(-1)) H alpha 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 A(V) = 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.
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Artículo de publicación ISI
Patrocinador
CONICYT through FONDECYT
3140566
3150473
3150238
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MNRAS 456, 323–346 (2016)
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