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The Motions of Formaldehyde Clouds Near Sgr A

Published online by Cambridge University Press:  25 April 2016

J. B. Whiteoak
J. B. Whiteoak*
Affiliation:
Division of Radiophysics, CSIRO, Sydney
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Extract

It is well known that a molecular cloud complex with a radial velocity of 40 km s–1 is located in front of and near Sgr A, the non-thermal source at the centre of our galaxy. The motion of this cloud is generally interpreted as a contraction towards the centre. In terms of the general kinematics of our galaxy the existence of contraction is not firmly established – the main spiral features are either stationary with respect to the local standard of rest or expanding outwards from the centre (e.g., the 4 kpc expanding arm). However, as a result of a high-resolution study of the H2CO absorption arising in the molecular cloud, an alternative interpretation not involving contraction is suggested.

Type
Interstellar Molecular Spectroscopy
Information
Publications of the Astronomical Society of Australia , Volume 2 , Issue 5 , September 1974 , pp. 248 - 250
Copyright
Copyright © Astronomical Society of Australia 1974

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References

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