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Title:
Neutral hydrogen absorption measurements yielding kinematic distances for 42 continuum sources in the galactic plane
Authors:
Caswell, J. L.; Murray, J. D.; Roger, R. S.; Cole, D. J.; Cooke, D. J.
Affiliation:
AA(Commonwealth Scientific and Industrial Research Organization, Div. of Radiophysics, Epping, New South Wales, Australia), AB(Commonwealth Scientific and Industrial Research Organization, Div. of Radiophysics, Epping, New South Wales, Australia), AC(Commonwealth Scientific and Industrial Research Organization, Div. of Radiophysics, Epping, New South Wales, Australia), AD(Commonwealth Scientific and Industrial Research Organization, Div. of Radiophysics, Epping, New South Wales, Australia), AE(Commonwealth Scientific and Industrial Research Organization, Div. of Radiophysics, Epping, New South Wales, Australia)
Publication:
Astronomy and Astrophysics, vol. 45, no. 2, Dec. 1975, p. 239-258. (A&A Homepage)
Publication Date:
12/1975
Category:
Astronomy
Origin:
STI
NASA/STI Keywords:
ABSORPTION SPECTRA, RADIO SOURCES (ASTRONOMY), SUPERNOVA REMNANTS, DISTANCE, GRAPHS (CHARTS), H II REGIONS, INTERFEROMETRY, KINEMATICS, RADIAL VELOCITY, VELOCITY DISTRIBUTION
Comment:
A&AA ID. AAA014.141.146
Bibliographic Code:
1975A&A....45..239C

Abstract

The Parkes hydrogen line interferometer has been used to measure 21 cm absorption profiles for 42 radio sources: approximately half are supernova remnants and most of the remainder are H II regions. We have used the results to determine kinematic distances to the sources and have thus greatly increased the number of galactic radio sources with well-determined distances. For supernova remnants this is of special importance, since very few reliable distance calibrators have previously been available.

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