A Survey of High-Latitude Molecular Gas

Details A Survey of High-Latitude Molecular Gas A Survey of High-Latitude Molecular Gas

Dec 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aas...195.7306m&link_type=abstract

American Astronomical Society, 195th AAS Meeting, #73.06; Bulletin of the American Astronomical Society, Vol. 31, p.1477

Astronomy and Astrophysics

Astronomy

Scientific paper

Nearly one-half of the southern Galactic hemisphere at b <= -30o was surveyed in the CO(1-0) emission line to determine the distribution of molecular gas at high Galactic latitudes and to find new molecular clouds. The sampling was done on a locally-Cartesian grid with 1o (true-angle) spacing in Galactic longitude and latitude. Of the 11,478 points in the grid, the 4982 which rise above an elevation of 30o in Cambridge, MA, the site of the 1.2 m millimeter-wave telescope used for the survey, were observed to an rms of TA* 0.1 K. We found 144 distinct CO(1-0) emission lines along 134 lines of sight. Of these molecular detections, 55 are new and 79 are associated with 26 previously-cataloged high-latitude molecular clouds situated within the survey boundaries. Adopting as the W(CO) to N(H2) conversion factor the value 1.0 x 1020 cm-2 [K km s-1]-1, the mass surface density of molecular gas in the region of the survey is 0.1 Msun pc-2. L.M. acknowledges partial support from NASA grants NAG5-3433 and NAG5-8376.

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