THE TYPE IIb SUPERNOVA 2013df AND ITS COOL SUPERGIANT PROGENITOR

We have obtained early-time photometry and spectroscopy of supernova (SN) 2013df in NGC 4414. From its luminosity at secondary maximum light, it appears that less super(56)Ni ([lap] 0.06 M sub([middot in circle])) was synthesized in the SN 2013df explosion than was the case for the SNe IIb 1993J, 20...

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Bibliographic Details
Published in:The Astronomical journal 2014-02, Vol.147 (2), p.1-9
Main Authors: van Dyk, Schuyler D, ZHENG, WEIKANG, Fox, Ori D, Cenko, S Bradley, Clubb, Kelsey I, Filippenko, Alexei V, Foley, Ryan J, Miller, Adam A, Smith, Nathan, Kelly, Patrick L, Lee, William H, Ben-Ami, Sagi, Gal-Yam, Avishay
Format: Article
Language:English
Subjects:
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
BOLOMETERS
CAMERAS
COMPARATIVE EVALUATIONS
DIAGRAMS
ENERGY SPECTRA
EXPLOSIONS
Field cameras
GALAXIES
Hubble Space Telescope
LUMINOSITY
MASS
METALLICITY
NICKEL 56
PHOTOMETRY
SIMULATION
Spectral energy distribution
SPECTROSCOPY
STAR EVOLUTION
Supergiant stars
SUPERNOVAE
Supernovas
TELESCOPES
VISIBLE RADIATION
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Summary:We have obtained early-time photometry and spectroscopy of supernova (SN) 2013df in NGC 4414. From its luminosity at secondary maximum light, it appears that less super(56)Ni ([lap] 0.06 M sub([middot in circle])) was synthesized in the SN 2013df explosion than was the case for the SNe IIb 1993J, 2008ax, and 2011dh. We have conducted Hubble Space Telescope (HST) Target of Opportunity observations of the SN with the Wide Field Camera 3, and from a precise comparison of these new observations to archival HST observations of the host galaxy obtained 14 yr prior to explosion, we have identified the progenitor of SN 2013df to be a yellow supergiant, somewhat hotter than a red supergiant progenitor for a normal Type II-Plateau SN. From its observed spectral energy distribution, assuming that the light is dominated by one star, the progenitor had effective temperature T sub(eff) = 4250 + or - 100 K and a bolometric luminosity L sub(bol) = 10 super(4.94+ or -0.06) L sub([middot in circle]).
ISSN:0004-6256
1538-3881
1538-3881
DOI:10.1088/0004-6256/147/2/37