The highest-redshift quasars

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations


The discovery of luminous quasars at z > 6 indicates the existence billion-solar-mass black holes at the end of reionization epoch. directly probing the early growth of supermassive black holes in the universe and the relation between the formation of early galaxies and black holes. Absorption spectra of these quasars trace the evolution of intergalactic medium (IGM). Currently, more than 60 quasars have been discovered at z > 5.5, including about 30 at z > 6. In this proceeding, I review the recent observational results studies of the highest redshift quasars, including the evolution of quasar density and luminosity function, the evolution of their spectral properties and chemical enrichment history and the evolution of AGN structure, and the evolution of Gunn-Peterson optical depth to probe the end of reionization epoch.

Original languageEnglish (US)
Title of host publicationDeciphering the Ancient Universe with Gamma-Ray Bursts
Number of pages8
StatePublished - 2010
EventInternational Symposium "Deciphering the Ancient Universe with Gamma-Ray Bursts" - Kyoto, Japan
Duration: Apr 19 2010Apr 23 2010

Publication series

NameAIP Conference Proceedings
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616


OtherInternational Symposium "Deciphering the Ancient Universe with Gamma-Ray Bursts"


  • Dust
  • Intergalactic medium
  • Quasar
  • Supermassive black hole

ASJC Scopus subject areas

  • General Physics and Astronomy


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