Young oxygen-rich supernova remnants. 1: Observations of three southern remnants

Abstract

view Abstract Citations (30) References (45) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Young Oxygen-rich Supernova Remnants. I. Observations of Three Southern Remnants Sutherland, Ralph S. ; Dopita, Michael A. Abstract Narrowband imaging and two-dimensional spectrophotometery are combined in a series of observations of N132D, a young, oxygen-rich supernova remnant in the Large Magellanic Cloud. 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 ~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. This forms the first paper in a short series, in the second paper an excitation mechanism for the oxygen-rich material, based on an R-type ionization front model, is presented. Publication: The Astrophysical Journal Pub Date: January 1995 DOI: 10.1086/175180 Bibcode: 1995ApJ...439..365S Keywords: Chronology; Density Distribution; Magellanic Clouds; Oxygen; Supernova Remnants; Temperature Profiles; Flux Density; Image Analysis; Spectrum Analysis; Stellar Spectrophotometry; Velocity Distribution; Astronomy; GALAXIES: MAGELLANIC CLOUDS; ISM: SUPERNOVA REMNANTS full text sources ADS | data products SIMBAD (3) NED (1) Related Materials (1) Part 2: 1995ApJ...439..381S