The kinematics of the rings around SN 1987A^*^.

Details The kinematics of the rings around SN 1987A^*^. The kinematics of the rings around SN 1987A^*^.

Jul 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995a%26a...299l...1m&link_type=abstract

Astronomy and Astrophysics, v.299, p.L1

Astronomy and Astrophysics

Astrophysics

17

Supernovae: Individual: Sn 1897A

Scientific paper

Spatially resolved profiles of the [O 111]5007 A emission line have been obtained from the three elliptically shaped rings of ionized gas surrounding SN 1987A. The morphology and kinematics of these phenomena are consistent with a model in which two toroidal, circular rings are travelling at <25km/s in opposite directions along the surfaces of a bi-polar cone centred on SN 1987A. The third, central ring is again in the form of a torus but expanding radially at 8.3km/s in a plane perpendicular to the common axis of the cones. All the ring structures must have been created 23x10^4^yrs prior to the explosion and are manifestations of the circumstellar environment of the progenitor star in the final stages of its non-catastrophic evolution.

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