Late-Time Spectral Evolution of the Type-II Supernova 1990E in NGC1035
We present low-resolution spectra obtained from 5 to 11 months after the discovery of the Type II supernova 1990E in NGC 1035. We analyse the evolution of the Hα feature and discuss the late-time luminosity- powering source through the evolution of the Hα flux. Whatever the SN 1990E photometric subclass, the shape of the Hα profile in these spectra
Gomez-Velarde, G. et al.
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1993