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

1986; IOP Publishing; Volume: 307; Linguagem: Inglês

10.1086/164422

1538-4357

T. M. Bania, A. A. Stark, G. M. Heiligman,

Molecular Spectroscopy and Structure

view Abstract Citations (28) References (23) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Clump 1: an Unusual Molecular Cloud Complex near the Galactic Center Bania, T. M. ; Stark, A. A. ; Heiligman, G. M. Abstract 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. Publication: The Astrophysical Journal Pub Date: August 1986 DOI: 10.1086/164422 Bibcode: 1986ApJ...307..350B Keywords: Galactic Nuclei; Galactic Structure; Interstellar Gas; Milky Way Galaxy; Molecular Clouds; Astronomical Maps; Carbon Monoxide; Hydrogen; Molecular Rotation; Molecular Spectra; Astrophysics; GALAXIES: MILKY WAY; GALAXIES: NUCLEI; GALAXIES: STRUCTURE; INTERSTELLAR: MOLECULES full text sources ADS | data products SIMBAD (5)