Mathematics – Logic
Scientific paper
Feb 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007noao.prop..386b&link_type=abstract
NOAO Proposal ID #2007A-0386
Mathematics
Logic
Scientific paper
Recent discoveries from the spectra of high-redshift quasars indicate that the reionization of the universe ended at z ~ 6. The next great frontier is the detection of the objects responsible for this reionization. We propose a search for Ly(alpha) emission from what would be the youngest-known confirmed astronomical objects, star-forming galaxies at z=8.2, in the Northern Hubble deep field. We argue that they may be detectable via narrow-band imaging in the near- infrared. Combining cosmological hydrodynamic simulations and assumptions about the characteristics of the high-redshift universe, we estimate that up to a few tens of sources in a single NIRI field are observable with 40 hours of on-source exposure time. Successful discovery of these objects would open a new field of study at early epochs, ultimately paving the way for an understanding of the star formation history of the early universe and the physics of reionization. The observations would be among the deepest narrow-band near-infrared images yet taken, producing substantial ancillary science from the measurement of [OII] (z ~ 2) and H(alpha) (z ~ 0.7) emission- line flux. The current proposal is a re-submission of highly-ranked 2004A, 2005A, and 2006A proposals. Because of poor weather on Mauna Kea, we have only 15 hours of usable exposure time. Here, we propose for an additional on-source time of 25 hours in the 1.122 (micron) filter.
Barton Elizabeth J.
Dav'e Romeel
Jensen Joseph B.
Papovich Casey
Smith John-David T.
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