Evidence for a Spectroscopic Sequence Among SNe IA

Details Evidence for a Spectroscopic Sequence Among SNe IA Evidence for a Spectroscopic Sequence Among SNe IA

Dec 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995aas...187.1709n&link_type=abstract

American Astronomical Society, 187th AAS Meeting, #17.09; Bulletin of the American Astronomical Society, Vol. 27, p.1309

Astronomy and Astrophysics

Astronomy

Scientific paper

We present evidence for a spectral sequence among Type Ia supernovae (SNe Ia). The sequence is based on the systematic variation of several features seen in the near-maximum light spectrum. This sequence is analogous to the recently noted photometric sequence among SNe Ia which shows a relationship between the peak brightness of a SN Ia and the shape of its light curve. In addition to the observational evidence we present a partial theoretical explanation for the sequence. This has been achieved by producing a series of non-LTE synthetic spectra in which only the effective temperature is varied. The synthetic sequence nicely reproduces most of the differences seen in the observed one and presumably corresponds to the amount of (56) Ni produced in the explosion.

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