Astronomy and Astrophysics – Astronomy
Scientific paper
May 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21620803w&link_type=abstract
American Astronomical Society, AAS Meeting #216, #208.03; Bulletin of the American Astronomical Society, Vol. 41, p.863
Astronomy and Astrophysics
Astronomy
Scientific paper
The Atacama Large Millimeter/submillimeter Array is rapidly proceeding through its commissioning stages in Chile. Within a short time, equipment from all over the world will be installed at the 5050m altitude Array Operations Site and a call will go out for proposals to use the instrument during its 'Early Science' phase. At the beginning of Early Science, a little over a year from now, 16 antennas of the final 66 will stand ready to produce the deepest images ever achieved in the cool thermal spectral region. The array will be equipped with at least three of its eventual complement of ten receivers; even now operating over a decade of bandwidth from 3.6mm to 0.42mm. At this point, its sensitivity will be on the order of 0.5mJy in a minute's integration. Operating at this stage baselines of at least .25km, ALMA will provide a beam as small as 0".3 on the little-explored southern skies from its Chilean site near the Tropic of Capricorn. By one year later, the array will have grown to more than fifty antennas; at the second call for proposals the array will reach 0.2 mJy in a minute and baselines will extend to the full set of array configurations, effectively about 14 km. Illustrative examples of observations which will be made possible by these transformative capabilities will be presented.
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