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. 25 references.
No takes yet. Share an insight, caveat, or question.
Branch et al. (1988) studied this question.
Synapse has enriched 5 related papers. Consider them for comparative context: