W28 and 3C 400.2 - Two shell-like radio supernova remnants with centrally peaked X-ray morphologies

Details W28 and 3C 400.2 - Two shell-like radio supernova remnants with centrally peaked X-ray morphologies W28 and 3C 400.2 - Two shell-like radio supernova remnants with centrally peaked X-ray morphologies

Jun 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...373..567l&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 373, June 1, 1991, p. 567-578. Research supported by Johns Hopkins Universi

Astronomy and Astrophysics

Astronomy

61

Astronomical Spectroscopy, Nebulae, Radio Sources (Astronomy), Supernova Remnants, X Ray Sources, Interstellar Matter, Line Of Sight, Radio Emission, X Ray Imagery

Scientific paper

The paper describes X-ray and optical observations with the Einstein Observatory of two SNRs which are examples of a group of SNRs that have centrally peaked X-ray surface brightness distributions and limb-brightened radio morphologies. X-ray and optical spectra confirm that they are located along lines of sight with substantial intervening absorption, as is the case of other objects that have these morphological characteristics. The hydrogen column density along the line of sight to both remnants is established at (7-11) x 10 to the 21st/sq cm. A thermal origin is proposed as the most likely explanation for the X-ray morphology. It is demonstrated that these SNRs do not have a density and temperature distribution which resembles that of a point explosion in a uniform-density medium, even when the overburden of absorption is considered.

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