Differences among expansion velocities of Type IA supernovae

Details Differences among expansion velocities of Type IA supernovae Differences among expansion velocities of Type IA supernovae

Jul 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...330l.117b&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 330, July 15, 1988, p. L117, L118. NSF-supported research.

Astronomy and Astrophysics

Astrophysics

61

Astronomical Spectroscopy, Photosphere, Radial Velocity, Stellar Spectra, Supernovae, Angular Velocity, Expansion, Homogeneity, Light (Visible Radiation), Line Spectra

Scientific paper

Spectroscopic data are used to show that observational differences between Type Ia supernovae do exist. Observed wavelengths of the absorption feature produced by the unresolved red Si II doublet, which is relatively deep and unblended in Type Ia supernovae within a month of maximum light, are analyzed as a function of time. An expression is given which can be used to predict the variation of the velocity of matter at the photosphere.

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