Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21731702w&link_type=abstract
American Astronomical Society, AAS Meeting #217, #317.02; Bulletin of the American Astronomical Society, Vol. 43, 2011
Astronomy and Astrophysics
Astronomy
Scientific paper
The Atacama Large Millimeter/submillimeter Array is rapidly proceeding through its commissioning stages in Chile. Tests at the atmospherically superb 5050m Array Operations Site and readiness reviews held during the Fall of 2010 will result in a decision to issue a call for proposals to use the instrument during its 'Early Science' phase. At the beginning of Early Science, projected for later in 2011, 16 antennas of the final 66 will stand ready to produce the deepest integrations ever achieved in the cool thermal spectral region. The array will be equipped with at least three of its eventual complement of ten receivers 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. Observations which will be made possible by these transformative capabilities will be presented.
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