Abstract
view Abstract Citations (57) References (62) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Young Oxygen-rich Supernova Remnants. II. an Oxygen-rich Emission Mechanism Sutherland, Ralph S. ; Dopita, Michael A. Abstract An emission mechanism is presented for the observed oxygen-rich plasma emission in young, oxygen-rich supernova remnants (OSNRs). The mechanism involves the interaction of a fast moving "blob" of oxygen-rich material with the SNR medium, forming a bow-shock/cloud-shock structure. The shock emission is then determined to drive a weak R-type ionization front through the oxygen-rich material. The combined shock and ionization front emission reproduces the major features of the observed optical and UV spectrum. Dynamical constraints based on the observed motions, lifetimes, and estimated densities of the oxygen-rich knots are used to determine model parameters. The plasma composition, predominantly [Ne/O] ~ -0.34, used is consistent with massive stellar evolution and explosive synthesis models. Significantly, the unusually high [O III] temperature-sensitive ratio is reproduced simultaneously with the low ionization, optical, [O I], and [O II] lines. The UV emission is predicted, and a good comparison is made with the UV spectrum of SNR E102.2 - 7219 from observations of Blair et al. (1989). Specific abundance variations were not used to make detailed fits to the observations, detailed abundance determination will require further observations. This forms the second paper in a short series; in the first paper observations for three southern OSNRs were presented. Those observations are used here along with other observations from the literature. Publication: The Astrophysical Journal Pub Date: January 1995 DOI: 10.1086/175181 Bibcode: 1995ApJ...439..381S Keywords: Oxygen; Shock Waves; Spectral Emission; Stellar Models; Supernova Remnants; Ultraviolet Spectra; Abundance; Cooling Flows (Astrophysics); Thermal Stability; Velocity Distribution; Astronomy; RADIATION MECHANISMS: NONTHERMAL; SHOCK WAVES; ISM: SUPERNOVA REMNANTS full text sources ADS | data products SIMBAD (6) NED (1) Related Materials (1) Part 1: 1995ApJ...439..365S
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