Early time optical spectroscopy of supernova SN 1998S

Details Early time optical spectroscopy of supernova SN 1998S Early time optical spectroscopy of supernova SN 1998S

Feb 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001a%26a...367..506a&link_type=abstract

Astronomy and Astrophysics, v.367, p.506-512 (2001)

Astronomy and Astrophysics

Astrophysics

10

Supernovae: General, Supernovae: Individual (Sn 1998S)

Scientific paper

We present medium-resolution optical spectra of the type II supernova SN 1998S obtained during the pre-maximum, maximum and early decline phases. The early decline spectra show complex Balmer line profiles: a narrow P-Cygni emission feature superimposed on a broad emission. The narrow emission has a redshift similar to that of the host galaxy, indicating its origin from a pre-supernova circumstellar material. The Hα luminosity of the broad component implies a shell mass of ~ 0.1 Msun for the supernova ejecta, while the luminosity of the narrow component implies a mass loss rate of 10-4 M

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