Refining the BTC40 Search for z> 4.8 Quasars Using IR Imaging.

Details Refining the BTC40 Search for z> 4.8 Quasars Using IR Imaging. Refining the BTC40 Search for z> 4.8 Quasars Using IR Imaging.

Aug 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005noao.prop..290k&link_type=abstract

NOAO Proposal ID #2005B-0290

Physics

Scientific paper

The determination of the QLF at 4.5 < z < 5.5 will help us to understand the relationship between quasars and more normal galaxies, and provide constraints on how galaxies and sub-galactic structures formed and evolved. It will also provide a constraint on the contribution of quasars to the ionizing UV background at high z. We propose to obtain J-band imaging using the ISPI on the CTIO 4m telescope of 20 quasar candidates selected as part of the BTC40 survey for z> 4.8 quasars. This imaging will allow us to further refine our faint candidate lists by using the z-J color to discriminate between very late type stars and high redshift quasars, allowing for a more efficient use of 8-10m class telescope time when performing follow-up spectroscopy of these faint (I=21.5) quasar candidates.

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