Astronomy and Astrophysics – Astronomy
Scientific paper
May 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...210.6602u&link_type=abstract
American Astronomical Society Meeting 210, #66.02; Bulletin of the American Astronomical Society, Vol. 39, p.174
Astronomy and Astrophysics
Astronomy
Scientific paper
The Very Large Array (VLA) radio telescope has conducted numerous wide-field surveys of great use to astronomers over the past decade. Examples of such surveys are (1) the "NRAO VLA Sky Survey" (NVSS) at 1.4 GHz; (2) the higher resolution 1.4 GHz "Faint Images of the Radio Sky at Twenty cm" (FIRST); and (3) the recently completed "VLA Low-frequency Sky Survey" (VLSS). The Expanded VLA (EVLA) project, currently under construction, will significantly increase the useful bandwidth while providing much finer spectral resolution, and also will have complete frequency coverage from 1 to 50 GHz. This will enable surveys to fainter flux limits over large areas of the sky, and the new band from 2 to 4 GHz may be of particular interest for wide area continuum surveys. The complete spectral coverage also will provide a unique capability for high-resolution surveys
of star formation regions (e.g., 6.7 GHz methanol lines) and of molecular lines in the distant Universe. The high sensitivity of the EVLA, increased by factors of 3-10 over current capabilities, also will enable it to play a very important role in detecting, monitoring, and imaging objects seen in wide field surveys such as those to be made by GLAST, hard X-ray telescopes, and sub-millimeter telescopes. This paper will present some of the EVLA characteristics that will be most important for wide field surveys, and give some specific examples of the science that will be enabled by EVLA.
Perley Rick
Ulvestad James S.
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