Imaging Cold Dust in the Galactic Plane

Details Imaging Cold Dust in the Galactic Plane Imaging Cold Dust in the Galactic Plane

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...20514006m&link_type=abstract

American Astronomical Society Meeting 205, #140.06; Bulletin of the American Astronomical Society, Vol. 36, p.1577

Astronomy and Astrophysics

Astronomy

Scientific paper

Images of continuum emission at wavelengths of 850 and 1200μ m from a section of the Galactic Plane near longitude 44o are presented. These data were obtained with the JCMT and SEST bolometer array receivers with beamwidths of about 14 and 22 arcsec respectively, and cover a total area of 2 square degrees. They constitute the first extensive observations of emission primarily from cold dust in a representative part of the Galaxy outside the Galactic Center. We employed complementary techniques at the two telescopes - chop/scan using SCUBA at the JCMT, and Fastscanning (direct detection) with SIMBA at the SEST - which together allow us to assess the reality of emission features where necessary.
Since interstellar dust is optically thin at mm/sub-mm wavelengths these observations provide a census of dense cold dust clumps throughout the Galaxy in this direction. Twenty-seven such objects are detected in the present survey, most of which can be identified with regions of star formation. In this paper we use complementary 13CO data from the BU-FCRAO Galactic Ring Survey to determine the kinematic distances of these sources, and compare these data with images obtained in the infrared by the MSX mission.
These observations presage the potential of large-scale surveys with forthcoming instrumentation, such as SCUBA2 and HARP/ACSIS at the JCMT.

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