Statistics – Applications
Scientific paper
Jan 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21530104c&link_type=abstract
American Astronomical Society, AAS Meeting #215, #301.04; Bulletin of the American Astronomical Society, Vol. 42, p.297
Statistics
Applications
Scientific paper
The Expanded Very Large Array (EVLA) project will begin Open Shared Risk Observing in March 2010. Over the next two years, more and more capabilities, aiming toward full operations in 2013, will be added and commissioned by the EVLA staff. At the beginning of 2013, we expect the full capabilities of a ten times increase in sensitivity, continuous coverage from 1 to 50 GHz, 8 GHz bandwidth with full polarization (for continuum applications), 64 separately tunable sub-bands (with adjustable bandwidth and frequency resolution, for spectral line applications) to be available to all users.
The EVLA will provide a large number of capabilities that will enhance the AGB, preplanetary nebula, and planetary nebula science. Just a few of these are listed: 1) many more AGB radio "photospheres" will be detectable; 2) surveys for radio continuum emission from preplanetary nebula will be empowered which will allow detections of ionized gas (from shock ionization) and cold dust/large grain emission; 3) imaging of the ionized gas in planetary nebulae and possible dust disks around their central stars, giving a measure of the physical properties of planetary nebulae (temperature, density, and nebular/dust disk mass); 4) sensitive and high spectral measurements of hydrogen, helium, and carbon recombination lines will provide kinematics of the nebular gas; 5) spectral imaging surveys of molecular lines will permit studies of AGB circumstellar shells at differing distances from the star. We will detail the capabilities of the EVLA as they pertain directly to AGB stars, pre-planetary nebulae, and planetary nebulae research, and present some preliminary results from the WIDAR correlator to stimulate the interest of those astronomers who pursue research into these areas.
The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc.
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