Physics
Scientific paper
Feb 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011sptz.prop70204f&link_type=abstract
Spitzer Proposal ID #70204
Physics
Scientific paper
The HST WFC3 Early Release Science (ERS) observations in the GOODS South field, together with the existing HST ACS observations provide a panchromatic 10-band survey of the ERS field that cover 40-50 square arcmin over the wavelength interval 0.2 to 1.7 microns to WFC3/IR depths of AB ~ 27.3 mag (5 sigma) for point sources. Such a deep, multiwavelegth survey provides a unique opportunity to study galaxy evolution out to z ~ 8 and even possibly to z ~ 10. These early galaxies are important because they serve as beacons of the first sites of star formation, as a constraint on galaxy formation models, and as probes of reionization. The only limitation to even further progress in exploring the early universe using the ERS data is the current depth of Spitzer/IRAC mid-infrared data in this field. IRAC adds the unique and important capability of tracing early galaxy stellar mass growth, stellar ages, and star formation rates back to z ~ 7 - 10. In this DDT program we propose significantly increasing the IRAC depth achieved in a 5'x5' area in the ERS field to ~ 27 AB mag (5 sigma, 3.6 micron). This probe of the early Universe to such a depth by HST and Spitzer/IRAC, will have a major impact on our knowledge of the galaxy evolution and leave an important legacy for years to come.
Ashby Matt
Fazio Giovanni
Hora Joseph
Huang Jiasheng
Soifer Tom
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