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[25.01] ¹³CO Bell Laboratories Survey: ¹³CO Column Density Distribution of the First Quadrant of the Galactic Plane

Y. Lee (Korea Astronomy Onservatory/TRAO), H.G. Kim (Korea Astronomy Observatory/TRAO), A.A. Stark (Harvard-Smithsonian Center for Astrophysics)

We present the distribution of ¹³CO column density of the first quadrant (l = 8 - 90) of the Galactic Plane using the ¹³CO Bell Laboratories Survey and UMass-Stony Brook ¹²CO Survey. We estimate the column density channel by channel (with a velocity step of 1 km/sec) with LTE assumption, generating the coumn density cube data for the first quadrant. Spatial resoultion is smoothed into 6 arcminute for whole direction. The highest column density is estimated to be 9.3x10¹⁶ cm^-2 per channel, which is one of the densest part of the Galactic Ring region. Good correaltionship is found between ¹³CO integrated instensity and column density. We discuss some charateristics of the column density distribution.

This work is supported by Creative Initiative Research Fund 99-NZ-01-01-A-31 of the Ministry of Science and Techonology, Republic of Korea.

The author(s) of this abstract have provided an email address for comments about the abstract: yulee@trao.re.kr

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