Abstract
We present optical spectra of the Type 1c supernova 1994I in M51 and preliminary non-local thermodynamic equilibrium (non-LTE) analysis of the spectra. Our models are not inconsistent with the explosions of C + O cores of massive stars. While we find no direct evidence for helium in the optical spectra, our models cannot rule out small amounts of helium. More than 0.1 M⊙ of helium seems unlikely.
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APA
Baron, E., Hauschildt, P. H., Branch, D., Kirshner, R. P., & Filippenko, A. V. (1996). Preliminary spectral analysis of SN 1994I. Monthly Notices of the Royal Astronomical Society, 279(3), 799–803. https://doi.org/10.1093/mnras/279.3.799
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