A wide latitude CO survey of the third galactic quadrant

Details A wide latitude CO survey of the third galactic quadrant A wide latitude CO survey of the third galactic quadrant

Apr 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26as...73...51m&link_type=abstract

Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 73, no. 1, April 1988, p. 51-83.

Astronomy and Astrophysics

Astronomy

60

Carbon Monoxide, Galactic Structure, Interstellar Gas, Milky Way Galaxy, Molecular Clouds, Astronomical Maps, Line Spectra, Open Clusters, Radio Sources (Astronomy)

Scientific paper

The results of an extensive survey toward the third quadrant in the J = 1-0 transition of CO are presented. The survey resolution is 0.5 deg and it is fully sampled from l = 210-279 deg, b = + or - 5 deg with a few extensions. The survey results are presented in the form of l, b and l, v contour maps which form a useful data base for statistical studies of star formation and galactic structure in the third quadrant. The survey has revealed the presence of intense and widespread CO emission between l approximately 255 and 279 deg, the properties of which are consistent with previous suggestions that a spiral arm is viewed end-on toward Vela. Numerous correlations between CO and HI emission in the third quadrant are discussed. Molecular counterparts to Lindblad's (1967) H, I arm, and possibly the L arm are identified, although no evidence for an 'expanding ring' molecular A feature is found. A tendency for third quadrant clouds to fall below the IAU plane is noted and is interpreted as evidence for a warp in the molecular disk. Molecular clouds associated with the OB associations Canis Major OB2, Puppis OB2, and Puppis OB3 are identified.

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