A (C-13)O survey of the Galactic plane from L = 38 deg to L = 67.5 deg - Molecular clouds and spiral arms

Details A (C-13)O survey of the Galactic plane from L = 38 deg to L = 67.5 deg - Molecular clouds and spiral arms A (C-13)O survey of the Galactic plane from L = 38 deg to L = 67.5 deg - Molecular clouds and spiral arms

Apr 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...195...93j&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 195, no. 1-2, April 1988, p. 93-104.

Astronomy and Astrophysics

Astrophysics

11

Carbon Monoxide, Galactic Structure, Interstellar Gas, Molecular Clouds, Milky Way Galaxy, Sagittarius Constellation

Scientific paper

The galactic plane has been mapped from l = 38° to l = 67°.5 in the J = 1-0 line of 13CO with the minitelescope of the Bordeaux Observatory. An automatic analysis of the l - V contour map gives a list of 181 clouds whose observed masses range from a few solar masses to a few 105M_sun;. Their distances have been determined from the standard galactic rotation curve and the distance ambiguity has been removed by using information from the published literature. The clouds have been plotted in a (Log(R),θ) diagram where the authors have fitted two spiral arms: the Perseus arm with a 12° pitch angle is identified in a galactic region where the interstellar clouds are especially scarce; a very well defined 22° pitch angle spiral feature connects the local interstellar material with the Sagittarius arm.

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