ON THE PROGENITOR AND EARLY EVOLUTION OF THE TYPE II SUPERNOVA 2009kr




Fraser M, Takats K, Pastorello A, Smartt SJ, Mattila S, Botticella MT, Valenti S, Ergon M, Sollerman J, Arcavi I, Benetti S, Bufano F, Crockett RM, Danziger IJ, Gal-Yam A, Maund JR, Taubenberger S, Turatto M

PublisherIOP PUBLISHING LTD

2010

Astrophysical Journal Letters

ASTROPHYSICAL JOURNAL LETTERS

ASTROPHYS J LETT

2

714

2

L280

L284

5

2041-8205

DOIhttps://doi.org/10.1088/2041-8205/714/2/L280



We identify a source coincident with SN 2009kr in Hubble Space Telescope pre-explosion images. The object appears to be a single point source with an intrinsic color V - I = 1.1 +/- 0.25 and M(V) = -7.6 +/- 0.6. If this is a single star, it would be a yellow supergiant of log L/L(circle dot) similar to 5.1 and a mass of 15(-4)(+5) M(circle dot). The spatial resolution does not allow us yet to definitively determine if the progenitor object is a single star, a binary system, or a compact cluster. We show that the early light curve is similar to a Type IIL SN, but the prominent H alpha P-Cygni profiles and the signature of the end of a recombination phase are reminiscent of a Type IIP. The evolution of the expanding ejecta will play an important role in understanding the progenitor object.




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