Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986azh....63..939b&link_type=abstract
Astronomicheskii Zhurnal (ISSN 0004-6299), vol. 63, Sept.-Oct. 1986, p. 939-945. In Russian.
Astronomy and Astrophysics
Astronomy
2
Emission Spectra, Optical Emission Spectroscopy, Shock Wave Propagation, Stratification, Supernova Remnants, Adiabatic Conditions, Forbidden Transitions, Line Spectra, Shock Fronts
Scientific paper
Line emission stratification is observed in two adiabatic supernova remnants, the Cygnus Loop and G 65.2 + 5.7. Regions most intense in the O III 507 A forbidden line are situated 0.04-0.6 pc closer to the nebular boundary than regions intense in the N II 6584 A and S II 6717 + 31 A forbidden lines. The stratification can be explained within the framework of a double-component model of supernova remnants: the primary shock wave produces a radial development of emission line formation zones in a cloud behind the inner shock wave front. The scale of development is determined by the primary shock wave velocity and line formation time. The computed values are in agreement with observational distances between O(+ +), N(+) and S(+) radiation regions.
Bychkov K. V.
Feedorova O. V.
Sitnik T. G.
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