Dynamical development of a ring-like structure in the supernova 1987A nebula

Details Dynamical development of a ring-like structure in the supernova 1987A nebula Dynamical development of a ring-like structure in the supernova 1987A nebula

Jan 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992natur.355...58w&link_type=abstract

Nature (ISSN 0028-0836), vol. 355, Jan. 2, 1992, p. 58-61.

Physics

55

Stellar Evolution, Stellar Structure, Stellar Winds, Supernova Remnants, Supernova 1987A, Blue Stars, Planetary Nebulae, Stellar Models, Stellar Rotation, Wolf-Rayet Stars

Scientific paper

The brightest part of the nebula around SN 1987A appears to be a simple ring which may be related to similar structures in planetary nebulae and around WR stars. The formation of such axisymmetric nebulae is presently discussed in terms of the interaction between the slow wind ejected by the progenitor of SN 1987A while it was a red supergiant (RSG) and the red wind subsequently generated by the same star after it had evolved into a blue supergiant (BSG). An initial, star rotation-induced small asymmetry in the RSG wind is in this scheme amplified by the action of the BSG wind. Such phenomena should be common in nebula formation, since only a small fraction of the observed circumstellar nebulae appear to be spherically symmetric.

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