AAS 204th Meeting, June 2004
Session 34 Detecting the First Stars and AGN
Topical Session, Tuesday, June 1, 2004, 8:30-10:00am, 10:45am-12:30pm, 2:30-4:00pm, 4:15-6:00pm, 707/709

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[34.10] High-redshift Quasars -- their Signatures and Effects

X. Fan (Arizona)

I will summarize recent observations of the highest redshift quasars and their relations to the first star formation and cosmic reionization. I will discuss the Gunn-Peterson effect in the quasar spectra and its implication to the history of reionization. I will present results on the evolution of quasar luminosity function at the highest redshift and the contribution of quasars/AGNs to the high-redshift ionizing background. I will also discuss the evidences of chemical enrichment and intensive star-formation activity in the high-redshift quasar environment. Finally, I will comment on the prospects of finding quasars at z>7 with existing or planned surveys.

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