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

Abstract

view Abstract Citations (95) References (18) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Kinematic Distances of Galactic H II Regions from H i Absorption Studies Kuchar, Thomas A. ; Bania, T. M. Abstract 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. Publication: The Astrophysical Journal Pub Date: November 1994 DOI: 10.1086/174886 Bibcode: 1994ApJ...436..117K Keywords: Absorption Spectra; Distance; Galactic Rotation; H Ii Regions; Kinematics; Statistical Distributions; Astronomical Observatories; Milky Way Galaxy; Molecular Clouds; Astrophysics; ISM: GENERAL; ISM: H II REGIONS; RADIO LINES: ISM full text sources ADS | data products SIMBAD (76)