Observations of SN 1987A: The narrow emission lines

Details Observations of SN 1987A: The narrow emission lines Observations of SN 1987A: The narrow emission lines

Jun 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988esasp.281a.103p&link_type=abstract

In ESA, A Decade of UV Astronomy with the IUE Satellite, Volume 1 p 103-106 (SEE N89-10682 01-89)

Astronomy and Astrophysics

Astronomy

1

Emission Spectra, Iue, Spaceborne Astronomy, Supernova 1987A, Ultraviolet Astronomy, Interstellar Chemistry, Nitrogen, Stellar Envelopes, Supergiant Stars

Scientific paper

The IUE observations of narrow emission lines of He2, CIII, NIII, NIV, NV, and OIII in the short wavelength spectrum of SN 1987A are presented. It is shown that they originate from a circumstellar shell, which is at least a light year in size and whose nitrogen abundance relative to both carbon and oxygen is greatly enhanced as compared with cosmic values. Because of its characteristics, this shell is likely to be the remnant of the wind ejected by the progenitor star when it was a red supergiant.

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