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Molecular Gas Dynamics in Spiral Arms of M51

Published online by Cambridge University Press:  03 August 2017

Nario Kuno
Department of Astronomy, Tohoku University, Japan
Naomasa Nakai
Nobeyama Radio Observatory, National Astronomical Observatory, Japan
Toshihiro Handa
Institute of Astronomy, University of Tokyo, Japan
Yoshiaki Sofue
Institute of Astronomy, University of Tokyo, Japan


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We present the kinematics and dynamics of molecular gas in the almost entire disk (>5′×5') of the grand-design spiral galaxy M51, derived from CO(J=1−0) observations with the Nobeyama 45-m telescope. The spatial resolution of 17″, which corresponds to 790pc at the distance of M51 (9.6 Mpc), is enough to distinguish between a spiral arm and an interarm; therefore a clear spiral structure (cf Nakai et al, this conference) and large streaming motions of the molecular gas were revealed.

III- Observations of Spiral Structure
Copyright © Kluwer 1991 


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