Looking for Ionizing Photons Escaping from Galaxies

Details Looking for Ionizing Photons Escaping from Galaxies Looking for Ionizing Photons Escaping from Galaxies

Apr 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007asthe.100..174i&link_type=abstract

The Astronomical Herald (ISSN 0374-2466), Vol. 100, No. 4, p. 174 - 183 (2007)

Astronomy and Astrophysics

Astronomy

Intergalactic Gas, Ionization, Hydrogen

Scientific paper

The cosmic renaissance, reionization is a phenomenon that neutral hydrogen atoms in the intergalactic space are ionized by strong ionizing radiation from some objects in the early universe. Forming galaxies are thought to be a good candidate for the ionizing sources. However, their contribution is very uncertain because ionizing photons from stars are easily absorbed by neutral hydrogen in the galaxies and these photons may not reach the intergalactic space. A key to solving if galaxies played a significant role in the cosmic reionization is the escape fraction of ionizing photons from galaxies into the intergalactic space. This article presents the attempts to measure the escape fraction of galaxies.

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