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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
Abstract
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.
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- III- Observations of Spiral Structure
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- Copyright © Kluwer 1991