Rotation-induced mixing and the nitrogen abundance in SN 1987A

Details Rotation-induced mixing and the nitrogen abundance in SN 1987A Rotation-induced mixing and the nitrogen abundance in SN 1987A

May 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...197l..11w&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 197, no. 1-2, May 1988, p. L11-L14.

Astronomy and Astrophysics

Astrophysics

29

Abundance, B Stars, Nitrogen, Stellar Composition, Stellar Rotation, Supernova 1987A, Iue, Magellanic Clouds, Stellar Mass, Supergiant Stars

Scientific paper

The authors call attention to some possible effects of rotation-induced meridional circulations on B supergiant stars like Sanduleak -69°202, the putative progenitor of Supernova 1987A. The high N/C and N/O ratios detected by IUE observations can possibly be understood in this context, without the condition that Sk -69°202 once had been a red supergiant. It would be much more difficult to explain high He/H ratios or the presence of s-process nuclei in the presupernova envelope on the basis of such mixing.

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