Narrow Lines in Type II Supernovae

Details Narrow Lines in Type II Supernovae Narrow Lines in Type II Supernovae

May 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aas...194.8601c&link_type=abstract

American Astronomical Society, 194th AAS Meeting, #86.01; Bulletin of the American Astronomical Society, Vol. 31, p.975

Astronomy and Astrophysics

Astronomy

Scientific paper

Type II supernovae (SNe) have massive progenitors. Prior to the SN detonation, they have a long history of copious mass loss. Pre-shocked circumstellar material can be identified through the presence of [N II]-bright, narrow-velocity components in the spectra of SNe (e.g., SN1978K; Chu et al. 1999, ApJ, 512, L51). These features should be common in type II SNe. We made high-dispersion echelle observations of 15 type II SNe with the KPNO 4-m telescope in March, 1999. Of these, six SNe were detected. Only four show a narrow Hα component, but none show corresponding bright, narrow [N II] emission. In this poster we present these results and their interpretation.

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