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http://hdl.handle.net/20.500.12386/24615
Titolo: | Supernova 2013fc in a circumnuclear ring of a luminous infrared galaxy: the big brother of SN 1998S | Autori: | Kangas, T. Mattila, S. Kankare, E. Lundqvist, P. Väisänen, P. Childress, M. Pignata, G. McCully, C. Valenti, S. Vinkó, J. PASTORELLO, Andrea ELIAS DE LA ROSA, NANCY DEL CARMEN Fraser, M. Gal-Yam, A. Kotak, R. Kotilainen, J. K. Smartt, S. J. Galbany, L. Harmanen, J. Howell, D. A. Inserra, C. Marion, G. H. Quimby, R. M. Silverman, J. M. Szalai, T. Wheeler, J. C. Ashall, C. BENETTI, Stefano Romero-Cañizales, C. Smith, K. W. Sullivan, M. Takáts, K. Young, D. R. |
Data pubblicazione: | 2016 | Rivista: | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | Numero: | 456 | Fascicolo: | 1 | Da pagina:: | 323 | 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 <SUP>56</SUP>Co decay with full γ-ray trapping. Initially, the spectrum was blue and featureless. Later on, a strong broad (∼8000 km s<SUP>-1</SUP>) 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 A<SUB>V</SUB> = 2.9 ± 0.2 mag and an age of 10_{-2}^{+3} 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. | URI: | http://hdl.handle.net/20.500.12386/24615 | ISSN: | 0035-8711 | DOI: | 10.1093/mnras/stv2567 | Bibcode ADS: | 2016MNRAS.456..323K | Fulltext: | open |
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