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Early Spectra Of The Supernova 1987f, Gary Wegner, Steven R. Swanson
Early Spectra Of The Supernova 1987f, Gary Wegner, Steven R. Swanson
Dartmouth Scholarship
Spectroscopy is presented of the peculiar Type n supernova 1987F, sometimes called the 'Type I Seyfert imposter'. This supernova differed from others of Type n in the slow evolution in its light curve and the strengths and profiles of the spectral lines. The time covered is 1987 April 2 to June 8, when the spectrum of the supernova evolved from a simple nearly featureless blue continuum with superimposed narrow emission lines of H I, He I, [N II], [0 III], and [S II] to a complicated combination of broad and narrow emission components in H I and He I plus …