Spectrum of SN 1983n in NGC 5236 at maximum light

Details Spectrum of SN 1983n in NGC 5236 at maximum light Spectrum of SN 1983n in NGC 5236 at maximum light

Mar 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985basi...13...68p&link_type=abstract

Astronomical Society of India, Bulletin, vol. 13, March 1985, p. 68-73.

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3

Spectrum Analysis, Stellar Luminosity, Stellar Spectra, Supernovae, Visible Spectrum, Absorption Spectra, Data Smoothing, Emission Spectra, Fourier Analysis, Helium, Stellar Evolution, Stellar Mass Ejection, Stellar Spectrophotometry

Scientific paper

The spectrum of SN 1983n in NGC 5236 (M83) obtained at its maximum light is presented. The spectrogram was digitized and smoothed using an optimal filter technique in Fourier space. The moonlight background was subtracted after smoothing. Though the spectrum conforms to a type I classification, it is peculiar in that the characteristic 6150-A absorption is very weak and the helium lines are seen in emission. The peculiarity probably is due to the fact that the supernova was underluminous; the identifiable features of He I, O I, Fe II, S II, and Ca II yield an expansion velocity of 12,350 + or 1910 km/s, a value consistent with other type I supernovas.

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