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

Details Resonant H- Photodetachment: Enhanced Photodestruction and Consequences for Radiative Feedback Resonant H- Photodetachment: Enhanced Photodestruction and Consequences for Radiative Feedback

Feb 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010apj...709l.168m&link_type=abstract

The Astrophysical Journal Letters, Volume 709, Issue 2, pp. L168-L171 (2010).

Astronomy and Astrophysics

Astronomy

3

Atomic Processes, Cosmology: Theory, Early Universe, Galaxies: Formation, Galaxies: High-Redshift

Scientific paper

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.

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