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Title:
A SCUBA Submillimetre Survey of the Galactic Centre
Authors:
Pierce-Price, D.; Richer, J. S.; Lasenby, A. N.; Holland, W. S.; Greaves, J. S.; Jenness, T.; Matthews, H. E.; White, G. J.; Ward-Thompson, D.; Dent, W. R. F.; Zylka, R.; Mezger, P.; Hasegawa, T.; Oka, T.
Affiliation:
AA(Cavendish Astrophysics, Cambridge), AB(Cavendish Astrophysics, Cambridge), AC(Cavendish Astrophysics, Cambridge), AD(Joint Astronomy Centre, Hawaii), AE(Joint Astronomy Centre, Hawaii), AF(Joint Astronomy Centre, Hawaii), AG(Joint Astronomy Centre, Hawaii), AH(Queen Mary and Westfield College), AI(University of Wales, Cardiff), AJ(UKATC, Edinburgh), AK(MPIfR, Bonn), AL(MPIfR, Bonn), AM(University of Tokyo), AN(University of Tokyo)
Publication:
Imaging at Radio through Submillimeter Wavelengths, ASP Conference Proceedings, Vol. 217, edited by Jeffrey G. Mangum and Simon J. E. Radford. Astronomical Society of the Pacific, ISBN 1-58381-049-8, 2000., p.164
Publication Date:
00/2000
Origin:
ADS
Comment:
ISBN: 1-58381-049-8
Bibliographic Code:
2000ASPC..217..164P

Abstract

We present first results from a wide-field submillimetre survey of the Galactic Centre, using SCUBA on the JCMT. Our ultimate aim is to map the central 3.0 × 0.6circ region of the Galactic Plane at 450 and 850microns. The `Central Molecular Zone', contains up to 10% of the Galaxy's molecular ISM. This survey will give an unbiased map of the temperature-weighted column density, to measure the total gas mass, find regions of star-formation, and investigate the cloud structures. So far, we have mapped approximately a 1.5 × 0.6circ area, including the Sgr A, Sgr B2, and Sgr D regions. Already our data show striking, complex features, such as filaments and shell-like structures, particularly in the Sgr A and Sgr D regions. We have used SCUBA's scan-map mode. Due to chopping of the secondary mirror, this creates dual-beam convolved images. To deconvolve the chop-function, we have used the `Emerson 2' algorithm, combining observations made of the same field using different chop throws and orthogonal chop position angles. Subsequent observations will complete the survey, and we are also developing alternative deconvolution algorithms.

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