Hunt for variations in molecular gas and cloud properties across the inner, northern Galactic disk

Details Hunt for variations in molecular gas and cloud properties across the inner, northern Galactic disk Hunt for variations in molecular gas and cloud properties across the inner, northern Galactic disk

Jul 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...411..720l&link_type=abstract

Astrophysical Journal - Part 1 (ISSN 0004-637X), vol. 411, no. 2, p. 720-728.

Astronomy and Astrophysics

Astronomy

11

Carbon Monoxide, Carbon 13, Disk Galaxies, Molecular Clouds, Molecular Gases, Interstellar Matter, Milky Way Galaxy, Sky Surveys (Astronomy)

Scientific paper

It is noted that the density-sensitive ratio of bulk (C-13)O emissivities in the J = 2-1 and 1-0 transitions of the Galactic molecular gas does not appear to vary systematically across the northern Galactic disk interior to the Solar Circle. Galactic GMCs are shown to be lumpy, with filling factors that are typically 10 percent; the density-temperature product in the lumps, however, has no trend with radius across the inner disk, and therefore contrasts with an earlier observation of the ratio of (C-12)O/(C-13)O bulk emissivities in the J = 1-0 transition changes over the northern half of the Galactic disk.

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