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Star-formation masers in the Magellanic Clouds: A multibeam survey with new detections and maser abundance estimates

Published online by Cambridge University Press:  01 July 2008

J. A. Green ,
J. L. Caswell ,
G. A. Fuller ,
A. Avison ,
S. L. Breen ,
K. Brooks ,
M. G. Burton ,
A. Chrysostomou ,
J. Cox  and
P. J. Diamond
...Show all authors
J. A. Green*
Affiliation:
Jodrell Bank Centre for Astrophysics, Alan Turing Building, University of Manchester, Manchester, M13 9PL, UK Australia Telescope National Facility, CSIRO, PO Box 76, Epping, NSW 2121, Australia
J. L. Caswell
Affiliation:
Australia Telescope National Facility, CSIRO, PO Box 76, Epping, NSW 2121, Australia
G. A. Fuller
Affiliation:
Jodrell Bank Centre for Astrophysics, Alan Turing Building, University of Manchester, Manchester, M13 9PL, UK
A. Avison
Affiliation:
Jodrell Bank Centre for Astrophysics, Alan Turing Building, University of Manchester, Manchester, M13 9PL, UK
S. L. Breen
Affiliation:
Australia Telescope National Facility, CSIRO, PO Box 76, Epping, NSW 2121, Australia School of Mathematics and Physics, University of Tasmania, Private Bag 37, Hobart, TAS 7001, Australia
K. Brooks
Affiliation:
Australia Telescope National Facility, CSIRO, PO Box 76, Epping, NSW 2121, Australia
M. G. Burton
Affiliation:
School of Physics, University of New South Wales, Sydney, NSW 2052, Australia
A. Chrysostomou
Affiliation:
Centre for Astrophysics Research, Science and Technology Research Institute, University of Hertfordshire, College Lane, Hatfield, AL10 9AB, UK
J. Cox
Affiliation:
Department of Physics and Astronomy, Cardiff University, 5 The Parade, Cardiff, CF24 3YB, UK
P. J. Diamond
Affiliation:
Jodrell Bank Centre for Astrophysics, Alan Turing Building, University of Manchester, Manchester, M13 9PL, UK
S. P. Ellingsen
Affiliation:
School of Mathematics and Physics, University of Tasmania, Private Bag 37, Hobart, TAS 7001, Australia
M. D. Gray
Affiliation:
Jodrell Bank Centre for Astrophysics, Alan Turing Building, University of Manchester, Manchester, M13 9PL, UK
M. G. Hoare
Affiliation:
School of Physics and Astronomy, University of Leeds, Leeds, LS2 9JT, UK
M. R. W. Masheder
Affiliation:
Astrophysics Group, Department of Physics, Bristol University, Tyndall Avenue, Bristol, BS8 1TL, UK
N. M. McClure-Griffiths
Affiliation:
Australia Telescope National Facility, CSIRO, PO Box 76, Epping, NSW 2121, Australia
M. Pestalozzi
Affiliation:
Centre for Astrophysics Research, Science and Technology Research Institute, University of Hertfordshire, College Lane, Hatfield, AL10 9AB, UK Göteborgs Universitet Insitutionen för Fysik, Göteborg, Sweden
C. Phillips
Affiliation:
Australia Telescope National Facility, CSIRO, PO Box 76, Epping, NSW 2121, Australia
L. Quinn
Affiliation:
Jodrell Bank Centre for Astrophysics, Alan Turing Building, University of Manchester, Manchester, M13 9PL, UK
M. A. Thompson
Affiliation:
Centre for Astrophysics Research, Science and Technology Research Institute, University of Hertfordshire, College Lane, Hatfield, AL10 9AB, UK
M. A. Voronkov
Affiliation:
Australia Telescope National Facility, CSIRO, PO Box 76, Epping, NSW 2121, Australia
A. Walsh
Affiliation:
School of Maths, Physics and IT, James Cook University, Townsville, QLD 4811, Australia
D. Ward-Thompson
Affiliation:
Department of Physics and Astronomy, Cardiff University, 5 The Parade, Cardiff, CF24 3YB, UK
D. Wong-McSweeney
Affiliation:
Jodrell Bank Centre for Astrophysics, Alan Turing Building, University of Manchester, Manchester, M13 9PL, UK
J. A. Yates
Affiliation:
University College London, Department of Physics and Astronomy, Gower Street, London, WC1E 6BT, UK
R. J. Cohen
Affiliation:
Jodrell Bank Centre for Astrophysics, Alan Turing Building, University of Manchester, Manchester, M13 9PL, UK
*
†E-mail: [email protected]
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Abstract

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The results of the first complete survey for 6668-MHz CH3OH and 6035-MHz excited-state OH masers in the Small and Large Magellanic Clouds are presented. A new 6668-MHz CH3OH maser in the Large Magellanic Cloud has been detected towards the star-forming region N 160a, together with a new 6035-MHz excited-state OH maser detected towards N 157a. We also re-observed the previously known 6668-MHz CH3OH masers and the single known 6035-MHz OH maser. Neither maser transition was detected above ~0.13 Jy in the Small Magellanic Cloud. All observations were initially made using the CH3OH Multibeam (MMB) survey receiver on the 64-m Parkes radio telescope as part of the overall MMB project. Accurate positions were measured with the Australia Telescope Compact Array (ATCA). In a comparison of the star formation maser populations in the Magellanic Clouds and our Galaxy, the LMC maser populations are demonstrated to be smaller than their Milky Way counterparts. CH3OH masers are under-abundant by a factor of ~50, whilst OH and H2O masers are a factor of ~10 less abundant than our Galaxy.

Keywords

maserssurveysstars: formationMagellanic Clouds
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 4 , Symposium S256: The Magellanic System: Stars, Gas, and Galaxies , July 2008 , pp. 227 - 232
Copyright
Copyright © International Astronomical Union 2009

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