Resonant H- photodetachment: Enhanced photodestruction and consequences for radiative feedback

S. Miyake, P. C. Stancil, H. R. Sadeghpour, A. Dalgarno, B. M. McLaughlin, R. C. Forrey

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Abstract

The hydrogen negative ion plays a crucial role in the formation of hydrogen molecules in the early universe. Cooling through excitation of H2 drives the formation of the first cosmological objects. The H2 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.

Original languageEnglish (US)
Pages (from-to)L168-L171
JournalAstrophysical Journal Letters
Volume709
Issue number2 PART 2
DOIs
StatePublished - Jan 1 2010

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All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

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