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; Väisänen, P; Childress, M; Pignata, G; McCully, C; Valenti, S; Vinkó, J [Vinkó, József (Csillagászat aszt...), szerző] Optikai és Kvantumelektronikai Tanszék (SZTE / TTIK / FTCS); Pastorello, A; Elias-Rosa, N; 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 [Szalai, Tamás (csillagászat, asz...), szerző] Optikai és Kvantumelektronikai Tanszék (SZTE / TTIK / FTCS); Wheeler, J C; Ashall, C; Benetti, S; Romero-Cañizales, C; Smith, K W; Sullivan, M; Takáts, K; Young, D R

Angol nyelvű Tudományos Sokszerzős vagy csoportos szerzőségű szakcikk (Folyóiratcikk)
  • SJR Scopus - Astronomy and Astrophysics: Q1
    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_{-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.
    Hivatkozás stílusok: IEEEACMAPAChicagoHarvardCSLMásolásNyomtatás
    2020-08-03 20:36