Identifying the Reionization Redshift from the Cosmic Star Formation Rate | Zendy

Rennan Barkana | Zendy; Abraham Loeb | Zendy

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Identifying the Reionization Redshift from the Cosmic Star Formation Rate

Author(s) -

Rennan Barkana,

Abraham Loeb

Publication year - 2000

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/309229

Subject(s) - reionization , physics , star formation , redshift , astrophysics , cosmic cancer database , galaxy , intergalactic travel , intergalactic medium , intergalactic dust , astronomy , drop (telecommunication) , intergalactic star , galaxy merger , telecommunications , computer science

We show that the cosmic star formation rate per comoving volume shouldexhibit a distinct drop around the reionization redshift, when the HII regionsin the intergalactic medium around individual ionizing sources firstoverlapped. The drop results from the increase in the temperature of theintergalactic medium as it was photo-ionized, and the consequent suppression ofthe formation of low-mass galaxies. We show quantitatively that the detectionof this drop, which is marked by a corresponding fall in the number counts offaint galaxies, should become feasible over the coming decade with the NextGeneration Space Telescope.Comment: 13 pages (including 2 Postscript figures), to appear in ApJ. Added extensive comparison with previous related wor

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