Mathematics – Logic
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...211.9728s&link_type=abstract
American Astronomical Society, AAS Meeting #211, #97.28; Bulletin of the American Astronomical Society, Vol. 39, p.908
Mathematics
Logic
Scientific paper
In March 2009 the Spitzer cryogen will be expended but the observatory will remain operative with 3.6/4.5 μm imaging capabilities over two 5'x5' fields-of-view with unchanged sensitivity. In this "warm" mission phase, Spitzer can operate until early 2014 providing up to 35,000 hours of observing time.
The Warm Mission will provide a unique opportunity for large-field and deep observations of nearby galaxies to address a number of fundamental science questions. Potential science goals include the morphological classification of galaxies, the investigation of the edges of galaxy disks and of intragroup/intracluster environments, the use of hot dust emission to trace star formation and AGNs, the monitoring of supernovae and other variable sources, and the calibration of stellar population models in the mid-IR.
In addition to being a powerful tool for studying nearby galaxies, IRAC excels at detecting distant objects, reaching greater depth in comparable exposure time at 3.6/4.5 μm than any ground- or space-based facility currently can at 2.2μm. The longer wavelengths probed by IRAC enable studies of the rest-frame optical and near-infrared light of galaxies and AGN to much higher redshift than is possible from the ground. A proposed three-tiered approach to distant extragalactic surveys in the Warm Mission covers a wide range of science goals:
1) an ultra-deep survey 0.04 square degrees to a depth of 250 hrs (in conjunction with an HST/WFC3 program) to study the Universe at 7
galaxies at z>6; and characterize the relation between the build-up of dark matter halos and their constituent galaxies at 2
Carey Sean
Helou George
Hurt Robert
Laine Seppo
Rebull Luisa
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