Oxygen Pumping: Probing Intergalactic Metals at the Epoch of Reionization

Details Oxygen Pumping: Probing Intergalactic Metals at the Epoch of Reionization Oxygen Pumping: Probing Intergalactic Metals at the Epoch of Reionization

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007apj...660l..85h&link_type=abstract

The Astrophysical Journal, Volume 660, Issue 2, pp. L85-L88.

Astronomy and Astrophysics

Astronomy

7

Cosmology: Cosmic Microwave Background, Cosmology: Theory, Galaxies: Intergalactic Medium, Ism: Abundances

Scientific paper

We consider the pumping of the 63.2 μm fine-structure line of neutral O I in the high-redshift intergalactic medium (IGM), in analogy with the Wouthuysen-Field effect for the 21 cm line of cosmic H I. We show that the soft UV background at ~1300 Å can affect the population levels, and if a significant fraction of the IGM volume is filled with ``fossil H II regions'' containing neutral O I, then this can produce a nonnegligible spectral distortion in the cosmic microwave background (CMB). O I from redshift z is seen in emission at (1+z)63.2 μm, and in the range 7

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