Hostname: page-component-745bb68f8f-s22k5 Total loading time: 0 Render date: 2025-01-12T20:50:25.208Z Has data issue: false hasContentIssue false
  • English
  • Français

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
Get access Rights & Permissions [Opens in a new window]

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

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Balick, B., and Sanders, R. H., ‘Radio Fine Structure in the Galactic Centre’ Astrophys. J., (in press) (1974).CrossRefGoogle Scholar
Downes, D., and Martin, A. H. M., Nature, 233, 112 (1971).Google Scholar
Oort, J. H., ‘The Galactic Centre’ (to be published in Proc. I.A.U. Symp. No. 60 on Galactic Radio Astronomy, Maroochydore) (1974).Google Scholar
Rieke, G. H., and Low, F. J., Astrophys. J., 184, 415 (1973).Google Scholar
Sandqvist, A., Ph.D. Thesis, University of Maryland, U.S.A. (1971).Google Scholar
Solomon, P. M., Scoville, N. Z., Penzias, A. A., Wilson, R. W., and Jefferts, K. B., Astrophys. J., 178, 125 (1972).CrossRefGoogle Scholar