Abstract
We present the photospheric optical spectra of SN1994I obtained with the 2.16m reflector of Beijing Astronomical Observatory. The spectra show features of type Ic supernovae as those of SN1987M did. A Monte Carlo spectrum synthesis code is employed to fit the April 10 spectrum. With the abundances of Nomoto et al. and an altered W7 density structure,we get a reasonable fit.For April 10, we find a photospheric velocity of ~10000kms-1,and a blackbody temperature of~8000K.The mass outside the photosphere at the epoch is 0.365M⊙. The modeling may provide evidence for C+O stars as progenitors of Type Ic supernovae.
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