Publication Abstracts

Cohen et al. 1986

Cohen, R.S., T.M. Dame, and P. Thaddeus, 1986: The Columbia CO survey of molecular clouds in the first galactic quadrant. Astrophys. J. Supp. Series, 60, 695-818, doi:10.1086/191101.

Using the Columbia millimeter-wave telescope, a 1.2 m Cassegrain with a beamwidth of 8', we have made a survey of 2.6 mm CO emission from the Galactic disk from l = 12° to l = 60° and |b| ≤ 1°. The survey comprises over 3000 spectra taken every 0.125°, approximately every beamwidth, for |b| ≤ 0.5° and every 0.25° elsewhere. The velocity resolution is 1.3 km/s, and the coverage is from -13 to 153 km/s at l < 55° and from -55 to 111 km/s for l ≥ 55°. The noise is 0.45 K rms per 1.3 km/s resolution element.

The calibration of the instrument has been compared with that of other telescopes. When the different beams are taken into account, it agrees well with measurements of individual molecular clouds (±17%) and the Galactic plane (±26%) done with both the Bell Laboratories 7 m and the NRAO 11 m telescopes. A measurement of the Sun with a standard gain horn differs from our measurement by only 6%.

This paper presents the entire collection of spectra as well as spatial and longitude-velocity maps.

Export citation: [ BibTeX ] [ RIS ]

BibTeX Citation

@article{co05100g,
  author={Cohen, R. S. and Dame, T. M. and Thaddeus, P.},
  title={The Columbia CO survey of molecular clouds in the first galactic quadrant},
  year={1986},
  journal={Astrophys. J. Supp. Series},
  volume={60},
  pages={695--818},
  doi={10.1086/191101},
}

[ Close ]

RIS Citation

TY  - JOUR
ID  - co05100g
AU  - Cohen, R. S.
AU  - Dame, T. M.
AU  - Thaddeus, P.
PY  - 1986
TI  - The Columbia CO survey of molecular clouds in the first galactic quadrant
JA  - Astrophys. J. Supp. Series
VL  - 60
SP  - 695
EP  - 818
DO  - 10.1086/191101
ER  -

[ Close ]

• Return to 1986 Publications

• Return to Publications Homepage