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Title:
Radio and X-ray maps of the supernova remnant W49B
Authors:
Pye, J. P.; Becker, R. H.; Seward, F. D.; Thomas, N.
Affiliation:
AA(Leicester, University, Leicester, England), AB(Leicester, University, Leicester, England), AC(Virginia Polytechnic Institute and State University, Blacksburg, VA), AD(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA)
Publication:
Royal Astronomical Society, Monthly Notices (ISSN 0035-8711), vol. 207, April 1, 1984, p. 649-657. (MNRAS Homepage)
Publication Date:
04/1984
Category:
Astronomy
Origin:
STI
NASA/STI Keywords:
ASTRONOMICAL MAPS, RADIO SOURCES (ASTRONOMY), SUPERNOVA REMNANTS, X RAY SOURCES, BRIGHTNESS DISTRIBUTION, CENTIMETER WAVES, SPACEBORNE ASTRONOMY, SPATIAL DISTRIBUTION
Bibliographic Code:
1984MNRAS.207..649P

Abstract

New high resolution radio maps of the supernova remnant (SNR) W49B at 6 and 20 cm are presented, together with soft X-ray maps representing the first detection of the SNR in X-rays. The source is also detected in the medium energy X-ray band. The radio maps have a resolution of about 12 arcsec and show that the emission is distributed in an incomplete shell of radius about 100 arcsec, with intense ridges in the west and east. There is no indication of significant spectral variations between 6 and 20 cm and no significant polarization is detected. The X-ray map shows emission which is clearly extended and increases in intensity toward the center of the radio remnant, with no evidence for limb brightening. The X-ray surface brightness distribution falls to half peak value at about 75 arcsec radius. There is no evidence for a pointlike X-ray source.

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