Uncovering the First Galaxies

Details Uncovering the First Galaxies Uncovering the First Galaxies

Mar 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009sptz.prop50057m&link_type=abstract

Spitzer Proposal ID #50057

Computer Science

Scientific paper

The identification of UV-luminous sources at the epoch of reionization is just barely possible with current technology, requiring large area coverage and tremendous depth in the near- and mid-IR. In Spitzer Cycle 3, we demonstrated that the combination of HST pure parallel NICMOS imaging and Spitzer/IRAC followup identifies good candidates for LBGs at 77 galaxies in this survey would resolve the outstanding question of whether the luminous galaxy population has evolved significantly from z=3-4 to z=7. This in turn, will answer the question of whether star formation at z>6 can reionize the intergalactic medium. Such luminous galaxies at very high redshift would provide an ionizing background which is sufficient fo ionize the intergalactic medium-- something which fainter galaxies, alone, may not be able to do. Even if no candidate galaxies are confirmed by the proposed observations, we will place stringent upper limits on the reionizing photons present at z>7.

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