Lyman-alpha emitting galaxies as probes of reionization

Details Lyman-alpha emitting galaxies as probes of reionization Lyman-alpha emitting galaxies as probes of reionization

May 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aas...206.2109m&link_type=abstract

American Astronomical Society Meeting 206, #21.09; Bulletin of the American Astronomical Society, Vol. 37, p.463

Astronomy and Astrophysics

Astronomy

1

Scientific paper

The visibility of Lyman-alpha emission from galaxies is suppressed substantially in a neutral inter-galactic medium (IGM). Because of this, Lyman-alpha emitting galaxies can be used as a local probe of the IGM neutral fraction. By comparing luminosity functions of Lyman-alpha emitters at redshifts z=5.7 and z=6.5, we can rule out suppression of Lyman-alpha emission and thus show that the IGM was largely ionized at z=6.5. This method can be extended to higher redshifts to trace the reionization history of the universe, and to derive the topoplogy of the ionized regions at the redshifts of reionization.

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