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The RMS survey: radio observations of candidate massive YSOs in the southern hemisphere

Published online by Cambridge University Press:  01 August 2006

J. S. Urquhart ,
A. L. Busfield ,
M. G. Hoare ,
S. L. Lumsden ,
A. J. Clarke ,
T. J. T. Moore ,
J. C. Mottram  and
R. D. Oudmaijer
J. S. Urquhart
Affiliation:
School of Physics and Astrophysics, University of Leeds, Leeds, LS2 9JT, UK email: jsu@ast.leeds.ac.uk
A. L. Busfield
Affiliation:
School of Physics and Astrophysics, University of Leeds, Leeds, LS2 9JT, UK email: jsu@ast.leeds.ac.uk
M. G. Hoare
Affiliation:
School of Physics and Astrophysics, University of Leeds, Leeds, LS2 9JT, UK email: jsu@ast.leeds.ac.uk
S. L. Lumsden
Affiliation:
School of Physics and Astrophysics, University of Leeds, Leeds, LS2 9JT, UK email: jsu@ast.leeds.ac.uk
A. J. Clarke
Affiliation:
School of Physics and Astrophysics, University of Leeds, Leeds, LS2 9JT, UK email: jsu@ast.leeds.ac.uk
T. J. T. Moore
Affiliation:
Astrophysics Research Institute, Liverpool John Moores University, Twelve Quays House, Egerton Wharf, Birkenhead, CH41 1LD, UK
J. C. Mottram
Affiliation:
School of Physics and Astrophysics, University of Leeds, Leeds, LS2 9JT, UK email: jsu@ast.leeds.ac.uk
R. D. Oudmaijer
Affiliation:
School of Physics and Astrophysics, University of Leeds, Leeds, LS2 9JT, UK email: jsu@ast.leeds.ac.uk
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Abstract

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The Red MSX Source (RMS) survey (Hoare et al. 2005) is a multi-wavelength programme of follow-up observations designed to distinguish between genuine massive young stellar objects (MYSOs) and other embedded or dusty objects, such as ultra compact (UC) HII regions, evolved stars and planetary nebulae (PNe). We have identified nearly 2000 MYSOs candidates by comparing the colours of MSX and 2MASS point sources to those of known MYSOs. There are several other types of embedded or dust enshrouded objects that have similar colours as MYSOs and contaminate our sample. Two sources of contamination are from UCHII regions and PNe, both of which can be identified from the radio emission emitted by their ionised nebulae. In order to identify UCHII regions and PNe that contaminate our sample we have conducted high resolution radio continuum observations at 3.6 and 6 cm of all southern MYSOs candidates (235° < l < 350°) using the Australia Telescope Compact Array (ATCA).

Keywords

Radio continuum: stars – Stars: formation – Stars: early-type – Stars: pre-main sequence
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S237: Triggered Star Formation in a Turbulent ISM , August 2006 , pp. 482
Copyright
Copyright © International Astronomical Union 2007

References

Urquhart, J. S. et al. 2006, astro-ph/0605738Google Scholar
Hoare, M. G. et al. 2005, in: Cesaroni, R., Felli, M., Churchwell, E., Walmsley, M., Massive star birth: A crossroads of Astrophysics (Cambridge: Cambridge Univ.), p. 370Google Scholar