The spectrograms of Sanduleak -69.202 deg, precursor to supernova 1987A in the Large Magellanic Cloud

Details The spectrograms of Sanduleak -69.202 deg, precursor to supernova 1987A in the Large Magellanic Cloud The spectrograms of Sanduleak -69.202 deg, precursor to supernova 1987A in the Large Magellanic Cloud

Jul 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...219..229w&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 219, no. 1-2, July 1989, p. 229-236.

Astronomy and Astrophysics

Astrophysics

52

Magellanic Clouds, Stellar Spectra, Supergiant Stars, Supernova 1987A, Classifications, Nitrogen, Ubv Spectra

Scientific paper

The classification spectrograms of Sk -69.202 deg from ESO objective-prism plates are discussed and compared with data for six other LMC supergiants of similar spectral types. It is found that the spectral type of Sk -69.202 deg must be in the range B0.7-B3. The implications of the observations for the properties of the SN 1987A precursor are examined, including the possibility of nitrogen enhancement.

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