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Escape Fraction of High-Z LAEs and LBGs in Dust-free vs. Dust-included Cases

Study on ionizing photons escape fraction from high-z LAEs & LBGs considering interstellar dust impact. Model galaxy research results show 15%-45% escape fraction despite dust absorption.

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Escape Fraction of High-Z LAEs and LBGs in Dust-free vs. Dust-included Cases

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  1. 1:University of Tsukuba 2:Tokyo institute of technology Escape fraction Dust-free case Dust-included case log10XHI -8 -4 0 Escape fraction of ionizing photons from high-z LAEs and LBGs ★H. Yajima1, M. Umemura1, M. Mori1, T. Nakamoto2 Model galaxy(Mori&Umemura 2006) ●High-z LAEs and LBGs can be major ionizing sources in the cosmic reionization era. ●Solving three dimensional radiation transfer (RT) equation, we estimate the escape fraction of ionizing photons from LAEs and LBGs. ●Interstellar dust absorbs the ionizing photons effectively and decline the escape fraction. ●However,High-z LAEs and LBGs have a large escape fraction (~15%-45%). Star gas Z/Zsun RT cal. Result: Ionization structure LAE phase z=7.0 z=5.8 LBG phase LAEs z=3.7 z=5.0 LBGs LAE phase LBG phase

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