Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...21114303c&link_type=abstract
American Astronomical Society, AAS Meeting #211, #143.03; Bulletin of the American Astronomical Society, Vol. 39, p.996
Astronomy and Astrophysics
Astronomy
Scientific paper
Until now, the coarse angular resolution of single-dish submm/mm telescopes has limited the depth of extragalactic surveys through confusion noise, meaning that only 20-30% of the 850 micron background can be resolved. However, the majority of this population should have flux densities of 1 mJy or fainter, and so either cannot be resolved or would require prohibitively long integration times to conduct surveys with existing interferometers. This will change with the advent of the Atacama Large Millimeter Array (ALMA); beginning operation within the next decade, it will provide an order of magnitude increase in sensitivity over that of current interferometers. To better plan for future surveys with this facility, I have prepared a set of simulated 850 micron and 1 mm maps covering 16 square arcminutes with an angular resolution of 1 arcsecond. The input models used to create these simulations are based on our current constraints on the 850 micron and 1 mm number counts, as well as a heuristic model which assumes an evolving 60 micron IRAS luminosity function. This work shows how ALMA will constrain the number counts well below the sub-mJy level. Research was conducted as part of the National Science Foundation's Research Experience for Undergraduates program.
Carilli Michael
Wagg Jeff
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