Clump 1 - an unusual molecular cloud complex near the Galactic center

Details Clump 1 - an unusual molecular cloud complex near the Galactic center Clump 1 - an unusual molecular cloud complex near the Galactic center

Aug 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...307..350b&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 307, Aug. 1, 1986, p. 350-366. Research supported by the Research Corp.

Astronomy and Astrophysics

Astrophysics

21

Galactic Nuclei, Galactic Structure, Interstellar Gas, Milky Way Galaxy, Molecular Clouds, Astronomical Maps, Carbon Monoxide, Hydrogen, Molecular Rotation, Molecular Spectra

Scientific paper

The properties of the (C-12)O and (C-13)O emission from Clump I, a complex of molecular clouds which shows the largest noncircular velocities of any molecular material known in the Milky Way, are studied. Observations of the J = 1-0 rotational transitions of the above molecules are reported, and the large-scale distribution and kinematics of the molecular gas in the direction of Clump I are discussed. The small-scale structure is described based on one arcmin resolution of (C-13)O data. Physical properties of the molecular material are derived, and the dynamics of the Clump I clouds are discussed in the context of their stability against Galactic tidal forces. It is concluded that all the clouds in the complex are gravitationally bound, although their outer envelopes may be tidally disrupted by the Galactic potential. The relative motion of the clouds is qualitatively similar to giant molecular cloud complexes in spiral arms of the outer Galactic disk, but the velocities are higher.

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