Distribution of hydroxyl clouds in the galaxy

Journal Article · Thu Sep 01 04:00:00 EDT 1988 · Astrophysics (Engl. Transl.); (United States)

DOI:https://doi.org/10.1007/BF01004074· OSTI ID:6018207

Yurevich, L V

The distribution of molecular clouds in the Galaxy is investigated on the basis of a survey of the galactic plane in the hydroxyl lines at frequencies 1665 and 1667 MHz. The distances to the clouds are determined from the dependence D(r) of the parameters of the hydroxyl absorption lines on the heliocentric distance. Radial distributions of the molecular clouds in four galactocentric quadrants have been obtained. The observed concentration of the hydroxyl clouds into a molecular ring agrees with the radial distribution of the interstellar CO and CH molecules in the Galaxy. It is shown that the large-scale distribution of the cloud complexes can be described by a model of a two-arm spiral with pitch angles 6/degree/.3 and 5/degree/.4.

• OSTI ID: 6018207
• Journal Information: Astrophysics (Engl. Transl.); (United States), Journal Name: Astrophysics (Engl. Transl.); (United States) Vol. 28:2; ISSN ATPYA
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABSORPTION SPECTRA
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
COSMIC GASES
COSMIC RADIO SOURCES
DISTANCE
DISTRIBUTION
ELEMENTS
EMISSION SPECTRA
FLUIDS
GALAXIES
GASES
H2 REGIONS
HYDROGEN
HYDROXYL RADICALS
INTERSTELLAR SPACE
LINE WIDTHS
MILKY WAY
MOLECULES
NONMETALS
OXIDES
OXYGEN COMPOUNDS
RADICALS
REMOTE SENSING
SPACE
SPECTRA