SN 1991bg - A type IA supernova with a difference

Details SN 1991bg - A type IA supernova with a difference SN 1991bg - A type IA supernova with a difference

Jan 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aj....105..301l&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 105, no. 1, p. 301-313.

Other

208

Astronomical Photometry, Light Curve, Stellar Luminosity, Stellar Spectra, Supernovae, Interstellar Extinction, Stellar Color, Stellar Mass Ejection

Scientific paper

While SN 1991bg is an unusual type Ia SN in such a feature as the brief duration of the photospheric phase, which ended only two weeks after maximum, it shares with other Ia SNs strong Si II and Ca II lines near maximum light. In addition, the light and color curve slopes are almost identical with the templates at late times. The spectral evolution of SN 1991bg is also unique but not unrecognizable; nevertheless, the peculiarities associated with this event complicate the fundamental question as to whether the Ia SNs make good standard candles.

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