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Title:
Young oxygen-rich supernova remnants. 1: Observations of three southern remnants
Authors:
Sutherland, Ralph S.; Dopita, Michael A.
Affiliation:
AA(University of Colorado, Boulder, CO, US), AB(University of Colorado, Boulder, CO, US)
Publication:
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 439, no. 1, p. 365-380 (ApJ Homepage)
Publication Date:
01/1995
Category:
Astronomy
Origin:
STI
NASA/STI Keywords:
CHRONOLOGY, DENSITY DISTRIBUTION, MAGELLANIC CLOUDS, OXYGEN, SUPERNOVA REMNANTS, TEMPERATURE PROFILES, FLUX DENSITY, IMAGE ANALYSIS, SPECTRUM ANALYSIS, STELLAR SPECTROPHOTOMETRY, VELOCITY DISTRIBUTION
DOI:
10.1086/175180
Bibliographic Code:
1995ApJ...439..365S

Abstract

Narrowband imaging and two-dimensional spectrophotometry are combined in a series of observations of N132D, a young, oxygen-rich supernova remnant in the Large Magellanic Cloud (LMC). Comparison spectra of two galactic remnants, Pup A and SNR G292.0 + 1.8 are also examined. The observations permit the determination of some important physical parameters of the N132D remnant in particular. An expansion age of 2350 +/- 520 yr is obtained, significantly greater than the approximately 1300 yr obtained by Lasker (1980). Estimates of the densities and temperatures in the observed oxygen-rich material are made on the basis of simple homogeneous slab models. The models indicate that such simple models are unlikely to be appropriate; nevertheless they do highlight the difficulties of interpretation when the diagnostic plot trends lie in similar directions to that expected from reddening effects. Line fluxes are given in raw form, and estimates of the reddening that may be applicable are given.

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