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

Citation

Green, JA and Caswell, JL and Fuller, GA and Avison, A and Breen, SL and Brooks, K and Burton, MG and Chrysostomou, A and Cox, J and Diamond, PJ and Ellingsen, SP and Gray, MD and Hoare, MG and Masheder, MRW and McClure-Griffiths, N and Pestalozzi, M and Phillips, C and Quinn, L and Thompson, MA and Voronkov, MA and Walsh, A and Ward-Thompson, D and Wong-McSweeney, D and Yates, JA and Cohen, RJ, Star-formation masers in the Magellanic Clouds: A multibeam survey with new detections and maser abundance estimates, The Magellanic System: Stars, Gas and Galaxies Proceedings IAU Symposium No. 256, 28 July-1 August, 2008., Keele University, Staffordshire, pp. 227-232. ISBN 978-0-521-88987-2 (2009) [Non Refereed Conference Paper]

DOI: doi:10.1017/S1743921308028482

Abstract

The results of the first complete survey for 6668-MHz CH3 OH and 6035-MHz excited-state OH masers in the Small and Large Magellanic Clouds are presented. A new 6668-MHz CH3 OH 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 CH3 OH masers and the single known 6035MHz OH maser. Neither maser transition was detected above ∼ 0.13 Jy in the Small Magellanic Cloud. All observations were initially made using the CH 3 OH 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 H2 O masers are a factor of ∼ 10 less abundant than our Galaxy. © 2009 International Astronomical Union.

Item Details

Item Type:Non Refereed Conference Paper
Keywords:masers, surveys, stars, formation, magellanic clouds
Research Division:Physical Sciences
Research Group:Astronomical and Space Sciences
Research Field:Galactic Astronomy
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Physical Sciences
Author:Breen, SL (Dr Shari Breen)
Author:Ellingsen, SP (Professor Simon Ellingsen)
ID Code:58445
Year Published:2009
Deposited By:Physics
Deposited On:2009-10-06
Last Modified:2009-10-06
Downloads:0

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