The ring around supernova 1987A revisited. 1: Ellipticity of the ring

Details The ring around supernova 1987A revisited. 1: Ellipticity of the ring The ring around supernova 1987A revisited. 1: Ellipticity of the ring

Apr 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apj...425...51g&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 425, no. 1, p. 51-56

Statistics

Computation

16

Computational Astrophysics, Cosmology, Magellanic Clouds, Ring Galaxies, Supernova Remnants, Supernova 1987A, Computational Geometry, Ellipticity, Ion Emission, Light Curve

Scientific paper

Panagia et al. (1991) have measured the distance to the Large Magellanic Cloud (LMC), DLMC = 50.1 +/- 3.1 kpc from the fluorescence of the ring around SN 1987A, which was assumed to be circular. I recalculate DLMC using the supernova-ring method and the data of Panagia et al. both with and without the assumption that the ring is circular. For a circular ring, I find DLMC = 53.2 +/- 2.6 kpc, 3 kpc larger than the result of Panagia et al. For a ring of intrinsic eccentricity e the distance is smaller than for a circular ring by a fraction approximately 0.4e4, i.e., only 1% for e = 0.4.

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