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Molecular Spiral Structure in Messier 51 from 12CO(2—1) and (1—0) Single-Dish Observations

Published online by Cambridge University Press:  03 August 2017

S. García-Burillo  and
M. Guélin
S. García-Burillo
Affiliation:
IRAM, 300 rue de la piscine, 38406 St-Martin-D'Heres, France Centro Astronómico de Yebes, Apdo.148 E-19080 Guadalajara, Spain
M. Guélin
Affiliation:
IRAM, 300 rue de la piscine, 38406 St-Martin-D'Heres, France

Abstract

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We present the first results of a high angular resolution-high sensitivity survey of CO (J=1—0) and (2—1) emission in M 51, made with the IRAM 30 m telescope. Of all tracers of the inner spiral structure, CO, i.e. presumably the molecular gas, appears as the tracer with the smoothest in-arm distribution, the highest arm-interarm contrast and the most visible streaming motions. Although observed about everywhere, CO, in the interarm region, is mostly concentrated along 4 radial lanes, or bridges, connecting the two main spiral arms.

Type
III- Observations of Spiral Structure
Information
Symposium - International Astronomical Union , Volume 146: Dynamics of Galaxies and their Molecular Cloud Distributions , 1991 , pp. 67 - 71
Copyright
Copyright © Kluwer 1991 

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