Spectrum Analysis of the Type Ib Supernova SN 1999dn: Probable Identifications of Ciiand Hα
The Astrophysical Journal2000Vol. 540(1), pp. 452–455
Citations Over TimeTop 12% of 2000 papers
Abstract
Low resolution spectra of SN 1999dn at early times are presented and compared with synthetic spectra generated with the parameterized supernova synthetic-spectrum code SYNOW. We find that the spectra of SN 1999dn strongly resemble those of SN 1997X and SN 1984L, and hence we classify it as a Type Ib event. Line-identifications are established through spectrum synthesis. Strong evidence of both H-alpha and C II 6580 is found. We infer that H-alpha appears first, before the time of maximum brightness, and then is blended with and finally overwhelmed by the C II line after maximum; this favors a thin high-velocity hydrogen skin in this Type Ib supernova.
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