Open AccessA 4.8 and 8.6 GHz Survey of the Large Magellanic Cloud. I. The Images
Author(s) -
John R. Dickel,
V. J. McIntyre,
R. A. Gruendl,
D. K. Milne
Publication year - 2005
Publication title -
the astronomical journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.61
H-Index - 271
eISSN - 1538-3881
pISSN - 0004-6256
DOI - 10.1086/426916
Subject(s) - physics , large magellanic cloud , telescope , astrophysics , galaxy , astronomy , cover (algebra) , antenna (radio) , polarimetry , radio telescope , remote sensing , optics , geology , computer science , telecommunications , mechanical engineering , scattering , engineering
Detailed 4.8- and 8.6-GHz radio images of the entire Large Magellanic Cloudwith half-power beamwidths of 33" at 4.8 GHz and 20" at 8.6 GHz have beenobtained using the Australia Telescope Compact Array. A total of 7085 mosaicpositions were used to cover an area of 6 degrees on a side. Full polarimetricobservations were made. These images have sufficient spatial resolution (~8 and5 pc, respectively) and sensitivity (3-sigma of 1 mJy/beam) to identify most ofthe individual SNRs and H II regions and also, in combination with availabledata from the Parkes 64-m telescope, the structure of the smooth emission inthat galaxy. In addition, limited data using the sixth antenna at 4.5 to 6-kmbaselines are available to distinguish bright point sources (<3 and 2 arcsec,respectively) and to help estimate sizes of individual sources smaller than theresolution of the full survey. The resultant database will be valuable forstatistical studies and comparisons with x-ray, optical and infrared surveys ofthe LMC with similar resolution.Comment: 28 pages, 10 figures, 2 tables, accepted for publication in the Feb 2005 A
Accelerating Research
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom
Address
John Eccles HouseRobert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom