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Title:
Radio and X-ray observations of compact sources in or near supernova remnants
Authors:
Seaquist, E. R.; Gilmore, W. S.
Affiliation:
AA(David Dunlap Observatory, Richmond Hill, Ontario, Canada), AB(David Dunlap Observatory, Richmond Hill, Ontario, Canada)
Publication:
Astronomical Journal, vol. 87, Feb. 1982, p. 378-386. (AJ Homepage)
Publication Date:
02/1982
Category:
Astronomy
Origin:
STI
NASA/STI Keywords:
RADIO ASTRONOMY, RADIO SOURCES (ASTRONOMY), STELLAR STRUCTURE, SUPERNOVA REMNANTS, X RAY ASTRONOMY, ANTENNA ARRAYS, ASTRONOMICAL MAPS, POLARIZATION (WAVES), RADIANT FLUX DENSITY, RADIO SPECTRA, RADIO TELESCOPES, STELLAR ROTATION
Comment:
A&AA ID. AAA031.141.051
DOI:
10.1086/113109
Bibliographic Code:
1982AJ.....87..378S

Abstract

VLA multifrequency radio observations of six compact radio sources are presented from the list of nine objects proposed by Ryle et al. (1978) as a new class of radio star, possibly the stellar remnants of supernovae. The results of a search for X-ray emission from four of these objects with the Einstein Observatory are also given. The radio observations provide information on spectra, polarization, time variability, angular structure, and positions for these sources. The bearing of these new data on the nature of the sources is discussed. One particularly interesting result is that the polarization and angular-size measurements are combined in an astrophysical argument to conclude that one of the sources (2013+370) is extragalactic. No X-ray emission was detected from any of the four objects observed, but an extended X-ray source was found coincident with the supernova remnant G 33.6+0.1 near 1849+005. The measurements presented provide no compelling arguments to consider any of the six objects studied as radio stars.

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