TY - JOUR
T1 - The escape fraction of ionizing photons from galaxies at z = 0-6
AU - Inoue, Akio K.
AU - Iwata, Ikuru
AU - Deharveng, Jean Michel
PY - 2006/9
Y1 - 2006/9
N2 - The escape fraction of ionizing photons from galaxies is a crucial quantity controlling the cosmic ionizing background radiation and the reionization. Various estimates of this parameter can be obtained in the redshift range z = 0-6, either from direct observations or from the observed ionizing background intensities. We compare them homogeneously in terms of the observed flux density ratio of ionizing (~900 Å rest-frame) to non-ionizing ultraviolet (~1500 Å rest-frame) corrected for the intergalactic absorption. The escape fraction is found to increase by an order of magnitude, from a value less than 0.01 at z ≲1 to about 0.1 at z ≳ 4.
AB - The escape fraction of ionizing photons from galaxies is a crucial quantity controlling the cosmic ionizing background radiation and the reionization. Various estimates of this parameter can be obtained in the redshift range z = 0-6, either from direct observations or from the observed ionizing background intensities. We compare them homogeneously in terms of the observed flux density ratio of ionizing (~900 Å rest-frame) to non-ionizing ultraviolet (~1500 Å rest-frame) corrected for the intergalactic absorption. The escape fraction is found to increase by an order of magnitude, from a value less than 0.01 at z ≲1 to about 0.1 at z ≳ 4.
KW - Cosmology: observations
KW - Diffuse radiation
KW - Galaxies: evolution
KW - Intergalactic medium
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U2 - 10.1111/j.1745-3933.2006.00195.x
DO - 10.1111/j.1745-3933.2006.00195.x
M3 - Letter
AN - SCOPUS:67650664281
SN - 1745-3933
VL - 371
SP - L1-L5
JO - Monthly Notices of the Royal Astronomical Society: Letters
JF - Monthly Notices of the Royal Astronomical Society: Letters
IS - 1
ER -