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Title:
High resolution X-ray and radio images of the Crab-like supernova remnant G21.5-0.9
Authors:
Becker, R. H.; Szymkowiak, A. E.
Affiliation:
AA(Columbia University, New York, NY), AB(NASA, Goddard Space Flight Center, Greenbelt; Maryland, University, Baltimore, MD)
Publication:
Astrophysical Journal, Part 2 - Letters to the Editor, vol. 248, Aug. 15, 1981, p. L23-L26. (ApJL Homepage)
Publication Date:
08/1981
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
IMAGE RESOLUTION, RADIO SOURCES (ASTRONOMY), SUPERNOVA REMNANTS, X RAY ASTRONOMY, ASTRONOMICAL MAPS, ASTRONOMICAL MODELS, BRIGHTNESS TEMPERATURE, HIGH RESOLUTION, LUMINOSITY, NEBULAE, POLARIZATION
Comment:
A&AA ID. AAA030.125.009
DOI:
10.1086/183615
Bibliographic Code:
1981ApJ...248L..23B

Abstract

The Crab-like supernova remnant G21.5-0.9 has been imaged at 6 cm wavelength with the VLA and between 0.1-4 keV with the Einstein Observatory. Both the X-ray and radio images show a centrally peaked distribution of extended emission with no indication of a pointlike component. In contrast, the linearly polarized radio emission is distributed in a ring with a distinct central minimum. The electric vectors of the polarized radio emission are oriented circumferentially. The data support a Crab-like model for G21.5-0.9, but one in which a lower percentage of the radiated flux is emitted as X-rays relative to the Crab Nebula.

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