The Cornell Caltech Atacama Telescope

Details The Cornell Caltech Atacama Telescope The Cornell Caltech Atacama Telescope

2007-04-23

arxiv.org/abs/0704.3031v2

Astronomy and Astrophysics

Astrophysics

18th International Symposium on Space Terahertz Technology

Scientific paper

Cornell University, the California Institute for Technology, and the Jet Propulsion Laboratory are jointly studying the construction of a 25 m diameter telescope for submillimeter astronomy on a high mountain in northern Chile. This Cornell Caltech Atacama Telescope (CCAT) will combine high sensitivity, a wide field of view, and a broad wavelength range to provide an unprecedented capability for deep, large area, multi-color submillimeter surveys to complement narrow field, high resolution studies with ALMA. CCAT observations will address fundamental themes in contemporary astronomy, notably the formation and evolution of galaxies, the nature of the dark matter and dark energy that comprise most of the content of the universe, the formation of stars and planets, the conditions in circumstellar disks, and the conditions during the early history of the Solar system. The candidate CCAT site, at 5600 m in northern Chile, enjoys superb observing conditions. To accommodate large format bolometer cameras, CCAT is designed with a 20 arcmin field of view. CCAT will incorporate closed loop active control of its segmented primary mirror to maintain a half wavefront error of 10 mum rms or less. Instrumentation under consideration includes both short (650 mum-200 mum) and long (2 mm-750 mum) wavelength bolometer cameras, direct detection spectrometers, and heterodyne receiver arrays. The University of Colorado, a Canadian university consortium, and the UK Astronomy Technology Centre on behalf of the UK community are pursuing participation in the CCAT consortium. When complete early in the next decade, CCAT will be the largest and most sensitive facility of its class as well as the highest altitude astronomical facility on Earth.

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