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Title:
Properties of the SN 1987A circumstellar ring and the distance to the Large Magellanic Cloud [ Erratum: 1992ApJ...386L..31P ]
Authors:
Panagia, N.; Gilmozzi, R.; Macchetto, F.; Adorf, H.-M.; Kirshner, R. P.
Affiliation:
AA(Space Telescope Science Institute, Baltimore, MD; ESA, Astrophysics Div., Noordwijk, Netherlands; Catania, Università, Italy), AB(Space Telescope Science Institute, Baltimore, MD; ESA, Astrophysics Div., Noordwijk, Netherlands), AC(Space Telescope Science Institute, Baltimore, MD; ESA, Astrophysics Div., Noordwijk, Netherlands), AD(European Southern Observatory, Garching bei München, Germany), AE(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA)
Publication:
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 380, Oct. 10, 1991, p. L23-L26. (ApJL Homepage)
Publication Date:
10/1991
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
MAGELLANIC CLOUDS, STELLAR ENVELOPES, SUPERNOVA 1987A, EMISSION SPECTRA, HUBBLE SPACE TELESCOPE, IUE, LIGHT CURVE, ULTRAVIOLET EMISSION
DOI:
10.1086/186164
Bibliographic Code:
1991ApJ...380L..23P

Abstract

The distance to SN 1987A was determined by comparing the angular size of its circumstellar ring, measured from an HST image obtained in a narrow forbidden O III 5007 A filter, with its absolute size derived from an analysis of the light curves of narrow UV lines measured with the IUE. The analysis confirms that the observed elliptical structure is a circular ring seen at a mean inclination of i = 42.8 + or - 2.6 deg and provides a determination of its absolute diameter of (1.27 + or - 0.07) x 10 to the 18th cm. Its ratio to the angular diameter of 1.66 + or - 0.03 arcsec gives an accurate determination of the distance to SN 1987A, i.e., d(1987A) = 51.2 + or - 3.1 kpc.

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