Effective Screening Due to Minihalos during the Epoch of Reionization | Zendy

Rennan Barkana | Zendy; Abraham Loeb | Zendy

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Effective Screening Due to Minihalos during the Epoch of Reionization

Author(s) -

Rennan Barkana,

Abraham Loeb

Publication year - 2002

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/342313

Subject(s) - reionization , intergalactic medium , opacity , physics , halo , astrophysics , redshift , intergalactic travel , dark ages , lyman limit , ionization , absorption (acoustics) , astronomy , galaxy , optics , ion , quantum mechanics

We show that the gaseous halos of collapsed objects introduce a substantialcumulative opacity to ionizing radiation, even after the smoothly distributedhydrogen in the intergalactic medium has been fully reionized. This opacitycauses a delay of around unity in redshift between the time of the overlap ofionized bubbles in the intergalactic medium and the lifting of completeGunn-Peterson Lyman alpha absorption. The minihalos responsible for thisscreening effect are not resolved by existing numerical simulations ofreionization.Comment: 24 pages, 5 figures, submitted to Ap

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