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CO(J=2-1) Observations of the Edge-on Galaxy NGC 4631

Published online by Cambridge University Press:  03 August 2017

Y. Sofue ,
T. Handa ,
G. Golla  and
R. Wielebinski
Y. Sofue
Affiliation:
Institute of Astronomy, University of Tokyo, Mitaka, Tokyo 181
T. Handa
Affiliation:
Institute of Astronomy, University of Tokyo, Mitaka, Tokyo 181
G. Golla
Affiliation:
Institute of Astronomy, University of Tokyo, Mitaka, Tokyo 181 Max-Planck-Institut f”ur Radioastronomie, Bonn 1, FRG
R. Wielebinski
Affiliation:
Max-Planck-Institut f”ur Radioastronomie, Bonn 1, FRG

Abstract

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The interacting edge-on galaxy NGC 4631 has been observed in the 12CO(J = 2 − 1) line emission using the IRAM 30-m telescope with a resolution of 13″ (330 pc). The molecular gas is strongly concentrated in a ring-like disk of 1 kpc radius, which is rotating rigidly. Line proriles show several velocity components, which are attributable to spiral arms. Although the J=2−1 to 1−0 transition line ratio indicates that the gas is generally opaque against the lines, we find some optically thinner regions, as well.

Type
IX- Galaxy Nuclei
Information
Symposium - International Astronomical Union , Volume 146: Dynamics of Galaxies and their Molecular Cloud Distributions , 1991 , pp. 329 - 330
Copyright
Copyright © Kluwer 1991 

References

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