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Columbia CO Survey: Molecular Clouds and Spiral Structure

Published online by Cambridge University Press:  14 August 2015

R. S. Cohen ,
T. M. Dame  and
P. Thaddeus
R. S. Cohen
Affiliation:
Goddard Institute for Space Studies and Columbia University, New York City
T. M. Dame
Affiliation:
Goddard Institute for Space Studies and Columbia University, New York City
P. Thaddeus
Affiliation:
Goddard Institute for Space Studies and Columbia University, New York City

Extract

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We have recently completed at Columbia University a survey with a 1.2 meter telescope of 2.6 mm CO emission from the first galactic quadrant. The beamwidth of this telescope − 7.5′ at 2.6 mm - is optimal for a large-scale galactic survey: it is as small as that of the best 21-cm surveys but not so small that undersampling is required to finish a survey in a few hundred days of observing. The survey contains more than 3000 spectra between longitudes 12°and 60°and latitudes −1°and +1°. Spectra were taken every beamwidth for |b|≤0.25° and every two beamwidths elsewhere. Integration times, which averaged about 8 minutes, were adjusted to give an rms noise level of 0.3 K per 0.5 MHz spectral channel.

Type
Research Article
Information
Symposium - International Astronomical Union , Volume 87: Interstellar Molecules , 1980 , pp. 205 - 207
Copyright
Copyright © Reidel 1980 

References

Burton, W.B. and Shane, W.W. 1970, in IAU Symposium 38, p.397.Google Scholar
Lindblad, P., Grape, K., and Sandqvist, A., Schober, J. 1973, Astr. Ap. 24, 309.Google Scholar
Shane, W.W. 1972, Astr. Ap. 16, 118.Google Scholar
Solomon, P., Sanders, D., and Scoville, N. 1979, in IAU Symposium 84, p.35.Google Scholar