Astronomy and Astrophysics – Astrophysics
Scientific paper
1997-07-13
Astronomy and Astrophysics
Astrophysics
14 pages including 7 Postscript figures, paspconf.sty; To appear in proceedings ``SN 1987A: Ten Years After'' (eds. M. Phillip
Scientific paper
Recent observations of the rings around SN 1987A are discussed and modeled, with particular emphasis on HST observations of the inner ring by the SINS team (P.I.: R. P. Kirshner). It is found that the lowest density detected in the ring is roughly (1-2)E3 cm-3. The geometry of the inner ring is constrained by its different size in [N II] and [O III]. The implications of this on the distance to the supernova are discussed and we find an upper limit of 54.2 +/- 2.2 kpc, which is in agreement with recent RR Lyrae and Cepheid measurements. In addition, preliminary results are presented for improved calculations of the supernova breakout.
Lundqvist Peter
Sonneborn George
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