The Structure of the Circumstellar Gas of SN 1987 APeter
نویسنده
چکیده
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 1 team. It is found that the lowest density detected in the ring is (1 ? 2) 10 3 cm ?3. The geometry of the inner ring is constrained by its diierent size in N II] and O III]. The implications of this on the distance to the supernova are discussed and we nd < 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.
منابع مشابه
ar X iv : a st ro - p h / 97 07 14 4 v 1 1 3 Ju l 1 99 7 The Structure of the Circumstellar Gas of SN 1987 A
Recent observations of the rings around SN 1987A are discussed and modeled, with particular emphasis on HST observations of the inner ring by the SINS1 team. It is found that the lowest density detected in the ring is ∼ (1− 2)× 103 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 discus...
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