A deep CO survey of the third galactic quadrant.
Abstract
We present a new survey of the third galactic quadrant in the J = 1 - 0 transition line of CO. With an angular resolution of 8.8 arcmin and a rms noise temperature of 0.10 K, this survey has allowed the detection of weak emission from distant molecular clouds, 12 - 18 kpc from the galactic center, previously undetected in a low resolution survey of this region done with the same telescope (May et al., 1988). Owing to the warping of the outer Galaxy, the coverage follows a strip inclined to the galactic plane covering at least 3 deg in latitude between longitudes 210 deg and 270 deg, but only 2 deg between 194 deg and 210 deg. The results of the survey are presented in the form of a full set of latitude-velocity and longitude-velocity contour diagrams for each observed longitude and latitude, respectively. Spatial maps, obtained by integrating the CO over the spectral range where emission was detected, -19 to 110 km/s, summarize the survey for comparison with continuum data (gamma-ray, infrared, and radio).
- Publication:
-
Astronomy and Astrophysics Supplement Series
- Pub Date:
- May 1993
- Bibcode:
- 1993A&AS...99..105M
- Keywords:
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- Carbon Monoxide;
- Milky Way Galaxy;
- Sky Surveys (Astronomy);
- Interstellar Gas;
- Molecular Clouds;
- Astrophysics