Kinematic distances of Galactic H II regions from H I absorption studies

Details Kinematic distances of Galactic H II regions from H I absorption studies Kinematic distances of Galactic H II regions from H I absorption studies

Nov 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apj...436..117k&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-367X), vol. 436, no. 1, p. 117-124

Astronomy and Astrophysics

Astrophysics

56

Absorption Spectra, Distance, Galactic Rotation, H Ii Regions, Kinematics, Statistical Distributions, Astronomical Observatories, Milky Way Galaxy, Molecular Clouds

Scientific paper

A catalog of kinematic distances for sample of first Galactic quadrant H II regions is presented. H I absorption spectra were obtained toward 57 H II regions and were used to resolve the kinematic distance ambiguity. Combined with our previous study, the kinematic distances are presented for a total of 70 H II regions, 45 of which are new determinations. Absorption was detected within approximately 10 km/s of recombination line velocity for 92% of the H II regions. The positions of many of these sources coincide with giant molecular clouds and mark ridges of possible spiral arm segments within the solar circle.

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