Carbon monoxide in the inner Galaxy - The 3 kiloparsec arm and other expanding features

Details Carbon monoxide in the inner Galaxy - The 3 kiloparsec arm and other expanding features Carbon monoxide in the inner Galaxy - The 3 kiloparsec arm and other expanding features

Nov 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...242...95b&link_type=abstract

Astrophysical Journal, Part 1, vol. 242, Nov. 15, 1980, p. 95-111.

Astronomy and Astrophysics

Astrophysics

57

Carbon Monoxide, Galactic Structure, Milky Way Galaxy, Molecular Clouds, Astronomical Maps, Explosions, Galactic Nuclei, Gas Expansion, H Lines

Scientific paper

A survey of the latitude distribution of (C-12)O emission in the inner Galaxy shows that much of the dense molecular gas is found in several large-scale features spanning tens of degrees in l. The most prominent are the rotating nuclear disk, the 3 kpc arm, and the +135 km/s features. Each of these features is moving with a high (50-180 km/s) noncircular velocity, which can be unambiguously interpreted as expansion away from the galactic center. The (l, v) loci of the 3 kpc arm and +135 km/s feature can be described by simple kinematic ring structures, but the same ring cannot account for both objects.

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