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Resonant H – Photodetachment: Enhanced Photodestruction and Consequences for Radiative Feedback

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2041-8205_709_2_L168-1.pdf (320.77 KB)

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2010

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10.1088/2041-8205/709/2/L168

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IOP Publishing
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Miyake, S., P. C. Stancil, H. R. Sadeghpour, A. Dalgarno, B. M. McLaughlin, and R. C. Forrey. 2010. “ Resonant H – Photodetachment: Enhanced Photodestruction and Consequences for Radiative Feedback.” The Astrophysical Journal 709 (2) (January 14): L168–L171. doi:10.1088/2041-8205/709/2/l168. http://dx.doi.org/10.1088/2041-8205/709/2/L168.

Abstract

The hydrogen negative ion plays a crucial role in the formation of hydrogen molecules in the early universe. Cooling through excitation of (H_2) drives the formation of the first cosmological objects. The (H_2) molecules are produced primarily by a reaction sequence initiated by (H^–). We explore the influence of enhanced photodestruction rates that arise due to absorption by resonance states of (H^–) lying near 11 eV. We examine the feedback effects that occur in radiation fields characteristic of Population III stars, blackbody sources, power-law spectra, and the hydrogen Lyman modulated sawtooth spectra of the high-redshift intergalactic medium.

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atomic processes, cosmology: theory, early universe, galaxies: formation, galaxies: high-redshift

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This article is made available under the terms and conditions applicable to Other Posted Material (LAA), as set forth at Terms of Service

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http://nrs.harvard.edu/urn-3:HUL.InstRepos:22565794

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