Searching for the sources responsible for cosmic reionization: Probing the redshift range 7 < z <10 and beyond

  • Stark D
  • Ellis R
  • 2

    Readers

    Mendeley users who have this article in their library.
  • 10

    Citations

    Citations of this article.

Abstract

We review recent observations that suggest that the global star formation rate density of UV-bright galaxies is declining monotonically with redshift over 3 < z < 7 and illustrate the challenges that a continuation of this decline poses in explaining the assembled stellar mass in several z ∼ 6 galaxies deduced from recent Spitzer data. A plausible conclusion is a vigorous period of yet earlier star formation. Prior to JWST and TMT, strong lensing offers a unique probe of the extent of this earlier activity. We discuss the first results of a blind spectroscopic survey of 10 lensing clusters for 8.5 < z < 10 Ly α emitters using NIRSPEC on Keck. We demonstrate this survey is achieving an (unlensed) sensitivity equivalent to a star formation rate of 0.1 M⊙yr-1. A companion survey, now beginning with HST and Spitzer, will target lensed z and J-band drop-outs and probe a ≃ 1 arcmin2region 1 magnitude deeper than the UDF/NICMOS observations. In combination, both surveys will provide the first constraints on the contribution of early, low luminosity, sources to cosmic reionization. © 2005 Elsevier B.V. All rights reserved.

Author-supplied keywords

  • Cosmology: observations
  • Galaxies: high redshift
  • Gravitational lensing

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document

Authors

  • Daniel P. Stark

  • Richard S. Ellis

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free