XXIVth IAP Colloquium

Far away : light in the young universe at redshift beyond three

Monday July 7 to Friday July 11, 2008

List of BECKER's Presentation(s) ( Updated 20/01/2011 11:29:15 )

Precise if your presentation is oral or a poster : Oral
Title of your presentation : New Observations of Intergalactic Metals at z ~ 6

Quasar metal absorption lines provide a proximate means of studying star formation activity shortly after reionization. I present results from a new search for C IV at z~6 in the high-resolution infrared spectra of four high-z QSOs. These are the first data with enough path length and sensitivity to place strong constraints on the evolution of highly-ionized, metal enriched absorbers at these redshifts. Early indications are that the number density of C IV systems is at least a factor of two lower at z~6 than at z~3. I will discuss the implications for high-z star formation, IGM enrichment, and reionization.

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