EDP Sciences
Free access
Volume 410, Number 2, November I 2003
Page(s) 597 - 610
Section Formation, structure and evolution of stars
DOI http://dx.doi.org/10.1051/0004-6361:20031191

A&A 410, 597-610 (2003)
DOI: 10.1051/0004-6361:20031191

Observations of warm dust near methanol masers

A. J. Walsh1, 2, G. H. Macdonald3, N. D. S. Alvey3, M. G. Burton4 and J.-K. Lee4

1  Max Planck Institut für Radioastronomie, auf dem Hügel 69, 53121 Bonn, Germany
2  Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA, 02138, USA
3  Department of Electronics, University of Kent, Canterbury, Kent CT2 7NT, UK
4  Department of Astrophysics and Optics, School of Physics, University of New South Wales, NSW, 2052, Australia

(Received 16 July 2001 / Accepted 29 July 2003)

Continuum emission at 450 and 850  $\mu$m from warm dust has been mapped in the fields of 71 methanol masers. Within these fields lie 30 centimetre-wave radio continuum sources and an additional 13 methanol maser sites. Sub-mm emission is detected at all but one of the maser sites, confirming the association of methanol maser emission with deeply embedded objects. Measured bolometric luminosities confirm that methanol maser emission is an excellent signpost of high-mass star formation. Examples of nearby isolated maserless dust cores may be harbouring massive protostars at an earlier evolutionary stage.

Key words: stars: formation -- ISM: dust, extinction -- submillimeter -- infrared: ISM

Offprint request: A. J. Walsh, awalsh@cfa.harvard.edu

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