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Ammonia and Near-Infrared Observations of Southern Dark Clouds

Published online by Cambridge University Press:  25 April 2016

T.L. Bourke ,
A.R. Hyland ,
G. Robinson  and
S.D. James
T.L. Bourke
Affiliation:
Department of Physics, University College, The University of New South Wales, Australian Defence Force Academy, Canberra ACT 2600
A.R. Hyland
Affiliation:
Department of Physics, University College, The University of New South Wales, Australian Defence Force Academy, Canberra ACT 2600
G. Robinson
Affiliation:
Department of Physics, University College, The University of New South Wales, Australian Defence Force Academy, Canberra ACT 2600
S.D. James
Affiliation:
Department of Physics, University College, The University of New South Wales, Australian Defence Force Academy, Canberra ACT 2600
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Abstract

The Parkes radio telescope has been used to search a list of small, dense southern dark clouds and Bok globules for ammonia emission at 23.7 GHz. The ammonia observations, together with IRAS data and the cloud’s visual appearance, have been used to determine a short list of dark clouds for observation with the infrared imaging system (IRIS) on the Anglo-Australian Telescope, in an attempt to determine the dust density distribution within the clouds. Near-infrared images of a number of the short listed clouds have been obtained with IRIS at J, H and K’. Preliminary results are reported for this ammonia survey, together with IRIS images of the strong ammonia source DC 297.7–2.8. Coincident with the dense ammonia core of this object is an IRAS ‘core’ source, IRAS 11590–6452 and an extremely interesting near-infrared source, which lies on the edge of the error ellipse of the IRAS source.

Type
Galactic and Stellar
Information
Publications of the Astronomical Society of Australia , Volume 10 , Issue 3 , 1993 , pp. 236 - 240
Copyright
Copyright © Astronomical Society of Australia 1993

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