The gas distribution in the central region of the Galaxy. II - Carbon monoxide

Details The gas distribution in the central region of the Galaxy. II - Carbon monoxide The gas distribution in the central region of the Galaxy. II - Carbon monoxide

Dec 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...226..790l&link_type=abstract

Astrophysical Journal, Part 1, vol. 226, Dec. 15, 1978, p. 790-816.

Other

120

Carbon Monoxide, Galactic Nuclei, Interstellar Gas, Milky Way Galaxy, Galactic Structure, Gas Density, Hydrogen Ions, Molecular Gases, Spatial Distribution

Scientific paper

Observations of 2.6-mm CO emission in the inner Galaxy are presented, together with an interpretation of the expanding molecular features and of the more general distribution and kinematics of CO emission in approximately the inner 3 kpc of the Galaxy. The observations are interpreted in terms of the tilted-disk model of the inner Galaxy described by Burton and Liszt (1978). The results show that: (1) the same model that accounts for H I emission reproduces the molecular ring and other features of the CO observations as artifacts of the transformation of the emission from smoothly distributed molecular gas in the tilted disk into the observed coordinates and intensities; (2) the kinematics and distribution of H I and CO in the inner Galaxy are essentially identical; (3) the kinematics of the molecular gas in the inner Galaxy is extremely regular on large and small angular scales and exhibits the predictions of the tilted-disk model; and (4) molecular gas is overabundant in the inner Galaxy, relative to either the H I there or the molecular density in the rest of the Galaxy.

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