Probing Black Hole Growth in the Earliest Luminous Quasars

Details Probing Black Hole Growth in the Earliest Luminous Quasars Probing Black Hole Growth in the Earliest Luminous Quasars

Feb 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010noao.prop..105f&link_type=abstract

NOAO Proposal ID #2010A-0105

Computer Science

Scientific paper

We propose to use Triplespec on Hale Telescope to carry out near-IR spectroscopy of a sample of six luminous quasars at z~ 6. The new Hale observations, combined with existing data and upcoming Keck observations, will complete our near-IR spectroscopic survey of a flux- limited sample of 25 z~ 6 quasars selected from the SDSS. The near- IR quasar spectra will cover the critial spectral region from CIV to MgII and FeII emissions, and allow us to measure their central black hole masses. Using this complete sample, we will be able to, for the first time, derive the mass function and accretion rate distributions of active supermassive BHs in this early epoch. The BH distribution, combined with our on-going survey of star formation activities in the quasar host galaxies using submm and radio data, will reveal the relationship between BH growth and galaxy assembly in early epoch at the end of cosmic reionization, and place strong contraints on BH and galaxy formation theories. In addition, the near-IR spectra will be used to measure unbiased quasar redshifts which are needed for radio CO detections and studies of cosmic HII regions, and to measure the metallicity of quasar broad line reigons in order to constrain the chemical enrichment history in the vicitiny of the highest redshift quasars.

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