Additional sources of ionization in early universe and 21 cm line

Details Additional sources of ionization in early universe and 21 cm line Additional sources of ionization in early universe and 21 cm line

Aug 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006iaujd...7e..23v&link_type=abstract

The Universe at z > 6, 26th meeting of the IAU, Joint Discussion 7, 17-18 August 2006, Prague, Czech Republic, JD07, #23

Physics

Scientific paper

We consider the influence of decaying dark matter particles and ultra-high energy cosmic rays (UHECRs) on the ability of neutral gas at redshifts z = 10-50 to emit and absorb in the 21 cm line . We show that the signal in 21 cm is sensitive to properties of decaying particles and UHECRs, and conclude that future radio telescopes (LOFAR, PAST and SKA) are able not only to detect 21 cm signal originated from by decaying particles and UHECRs, but discriminate between them as well.

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