Other
Scientific paper
Aug 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006iauss...1e...1t&link_type=abstract
Astronomical Facilities of the Next Decade, 26th meeting of the IAU, Special Session 1, 16-17 August, 2006 in Prague, Czech Repu
Other
Scientific paper
The Atacama Large Millimeter Array is an international project to bring an array of mm and submm-wave telescopes to Llano de Chajnantor, in the high Atacama desert of Chile. ALMA consists of 50 12-meter antennas, funded by ESO and U.S. National Science Foundation through the NRAO, (in cooperation with the National Research Council of Canada), on land given in concession by Chile. The Atacama Compact Array (ACA) of 7m+12m antennas will be adjacent to the 50-antenna ALMA array, built with funding by Natural Institute of Natural Sciences of Japan through the NAOJ. The ACA adds the capability to image extended structure. With baselines up to 14 km, and frequency coverage of 30 to 950 GHz (10 mm to 350 microns), ALMA can achieve spatial resolutions up to 10 mas; continuum sensitivities of a few microJy and spectral resolutions equivalent to fractions of a km/s will make ALMA a fantastically sensitive instrument for imaging and spectroscopy of the cool universe. ALMA science will include: the AU-scale structure of thermal objects (gas, dust, planets) and gas kinematics in protoplanetary disks out to 150 pc; dynamics and chemistry of Galactic molecular clouds and cores; kinematics of obscured AGN and QSOs; thermal imaging of asteroids, comets, and Kuiper-belt objects; structure of photospheres of nearby giant stars; chemistry, structure, and gas-dynamics of galaxies and mergers; and imaging and dynamics of molecular gas in distant galaxies, from normal (L*) galaxies out to z=3, to lensed or ultraluminous systems to the highest z. The ALMA view of the gassy, dusty universe will be revolutionary and transformational; a complementary view to future instruments at other wavelengths.
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