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12.2 GHz Methanol Absorption towards Sgr A

Published online by Cambridge University Press:  25 April 2016

R. S. Peng  and
J. B. Whiteoak
R. S. Peng
Affiliation:
School of Physics, University of New South Wales
J. B. Whiteoak
Affiliation:
Division of Radiophysics, CSIRO, Sydney
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Abstract

Line absorption associated with the 12.2 GHz 20 − 3-1 transition of CH3OH has been mapped towards Sgr A with the Parkes 64-m radio telescope and a 2 arcmin beam. Two concentrations are present, both offset from the continuum peak, with velocities of 18 and 46 km s-1 and line-to-continuum ratios of 0.59 and 0.30. For the higher ratio the column density is almost 1017 cm-2. The concentrations may be associated with a molecular cloud which overlies Sgr A East but lies in part behind Sgr A West.

Type
Miscellaneous Radio Astronomy
Information
Publications of the Astronomical Society of Australia , Volume 8 , Issue 2 , 1989 , pp. 204 - 206
Copyright
Copyright © Astronomical Society of Australia 1989

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References

AIP Conference Proceedings 155, 1987 (ed. Backer, D. C.) (Amer. Inst. Phys., New York).CrossRefGoogle Scholar
Batrla, W., Matthews, H. E., Menten, K. M. and Walmsley, C. M., 1987, Nature, 326, 49.CrossRefGoogle Scholar
Gusten, R., Walmsley, C. M. and Pauls, T., 1981, Astron. Astropnys., 103, 197.Google Scholar
Koo, B.-C., Williams, D. R. W., Heiles, C. and Backer, D. C., 1988. Astrophys. J., 326, 931.CrossRefGoogle Scholar
Norris, R. P., Caswell, J. L., Gardner, F. F. and Wellington, K. J., 1987, Astrophys. J., 321, L159.CrossRefGoogle Scholar
Rogstad, D. H., Lockhart, I. A. and Whiteoak, J.B., 1974, Astron. Astrophys., 36, 245.Google Scholar
Whiteoak, J. B. and Gardner, F. F., 1979, Mon. Not. R. Astron. Soc., 188, 445.CrossRefGoogle Scholar
Whiteoak, J.B., Gardner, F. F. and Pankonin, V., 1983, Mon. Not. R. Astron. Soc., 202, 11P.CrossRefGoogle Scholar
Whiteoak, J.B., Gardner, F. F., Caswell, J. L., Norris, R. P. and Wellington, K. J., 1988, Mon. Not. R. Astron. Soc. (in press).Google Scholar