Astronomy and Astrophysics – Astrophysics
Scientific paper
May 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006sptz.prop30184h&link_type=abstract
Spitzer Proposal ID #30184
Astronomy and Astrophysics
Astrophysics
Scientific paper
Understanding the development of large scale structure and the evolution of galaxies in high-redshift clusters are key goals of observational astrophysics. We have identified a cluster of 14 luminous H-alpha emission line sources within a ~2 Mpc diameter region at z=2.3 towards the quasar FBQS J1416+2649. The J1416 cluster represents one of the richest known high-z galaxy clusters. We will use 3-hours of Spitzer Space Telescope time to otbain deep IRAC 3.6-8.0 um and MIPS 24 um images of the J1416 cluster in order to measure the rest-frame near- and mid-infrared emission from the 14 robustly star forming (or AGN dominated) galaxies. The final rest-frame optical to mid-infrared spectral energy distribution will be used to (1) constrain the evolved stellar populations in the cluster galaxies, allowing us to (2) model their star formation histories (i.e., recent starburst or exponentially decaying SFR, etc.) with Starburst99 and Pegase. Moreover, we will (3) identify highly obscured cluster galaxies and AGN and (4) estimate photometric redshifts for objects dominated by evolved stars throughout the young galaxy cluster. Selecting cluster galaxies based on both massive star formation and evolved stellar content will yield a more complete census of star and galaxy formation in an important epoch.
Herter Terry
Higdon James J.
Higdon Sarah
Houck James R.
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