Early-time Spitzer observations of the type II plateau supernova SN 2004dj



: Kotak R, Meikle P, van Dyk SD, Hoflich PA, Mattila S

Publisher: UNIV CHICAGO PRESS

: 2005

: Astrophysical Journal

: ASTROPHYSICAL JOURNAL

: ASTROPHYS J

: 628

: 2

: L123

: L126

: 4

: 0004-637X

DOI: https://doi.org/10.1086/432719


We present mid-infrared observations with the Spitzer Space Telescope of the nearby Type II-P supernova SN 2004dj at epochs of 89 - 129 days. We have obtained the first mid-IR spectra of any supernova apart from SN 1987A. A prominent [Ni II] 6.64 mu m line is observed, from which we deduce that the mass of stable nickel must be at least 2.2 x 10(-4) M-.. We also observe the red wing of the CO fundamental band. We relate our findings to possible progenitors and favor an evolved star, most likely a red supergiant, with a probable initial mass between similar to 10 and 15 M-..



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