Columbia CO survey - Molecular clouds and spiral structure
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Cohen, R. S.↗
Engineering topics
Cohen, R. S.
Publications and source records attributed to Cohen, R. S..
An out-of-plane CO survey of the first galactic quadrant
An out-of-plane survey of 2.6-mm CO emission from the first quadrant of the galactic disk carried out at Columbia University with a 1.2-meter telescope is reported. Longitude-velocity diagrams for the galactic plane and for latitude b + or - 0.5 deg are given. The half-thickness of the CO plane, its displacement, and the emissivity of CO, all as functions of galactic radius, are shown. New results are generally consistent with those reported before.
Cohen, R. S.↗
The galactic distribution of carbon monoxide: An out-of-plane survey
Galactic CO line emission at 115 GHz has been surveyed. This survey confirms the finding that CO is concentrated in a ring. It provides a determination of the thickness of this molecular ring as a function of galactic radius and shows that CO is displaced from the conventional galactic plane. These results were arrived at by least-squares fitting the survey data to a circularly symmetric model of the Galaxy. A comparison of the CO and HI distributions shows that there are marked differences in the distributions of these species, both radially and out of the plane. A detailed discussion of the antenna characteristics, including the radiation pattern and pointing characteristics is presented.
Cohen, R. S.↗
An out-of-plane galactic carbon monoxide survey
Galactic CO line emission at 115 GHz has been surveyed in the region from 15 to 60 deg galactic longitude and from about -1.5 to 1.5 deg latitude. In addition to confirming the findings of previous in-plane surveys that galactic CO emission is concentrated in a ring 6 kpc in radius, a fit of a cylindrically symmetric galactic model to the observational data has provided a determination of the thickness of this molecular ring and its displacement from the conventional galactic plane, both as functions of galactocentric distance. The average half-thickness at half-maximum of the molecular ring is 59 pc, and the average displacement of the ring with respect to the galactic equatorial plane is -40 pc.
Cohen, R. S.↗