Detection of a red supergiant progenitor star of a type II-plateau supernova

Cambridge); C. A. Tout; C. R. Benn (ING); G. F. Gilmore (IoA; J. R. Maund; M. A. Hendry; S. J. Smartt; S. Mattila (Stockholm Obs.)

Detection of a red supergiant progenitor star of a type II-plateau supernova

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arxiv astro-ph/0401235 v1 pith:MHYLJ4F7 submitted 2004-01-13 astro-ph

Detection of a red supergiant progenitor star of a type II-plateau supernova

S. J. Smartt , J. R. Maund , M. A. Hendry , C. A. Tout , G. F. Gilmore (IoA , Cambridge) , S. Mattila (Stockholm Obs.) , C. R. Benn (ING) This is my paper

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We present the discovery of a red supergiant star that exploded as supernova 2003gd in the nearby spiral galaxy M74. The Hubble Space Telescope (HST) and the Gemini Telescope imaged this galaxy 6 to 9 months before the supernova explosion and subsequent HST images confirm the positional coincidence of the supernova with a single,resolved star which is an 8 +4/-2 solar mass red supergiant. This confirms both stellar evolution models and supernova theories which predict that type II-Plateau supernovae have cool red supergiants as their immediate progenitor stars.

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