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- W4311553102 abstract "The fraction of ionizing photons escaping from galaxies, $f_{esc}$, is at the same time a crucial parameter in modelling reionization and a very poorly known quantity, especially at high redshift. Recent observations are starting to constrain the values of $f_{esc}$ in low-z star-forming galaxies, but the validity of this comparison remains to be verified. Applying at high-z the empirical relation between $f_{esc}$ and the UV slope trends derived from the Low-z Lyman Continuum Survey, we use the DELPHI semi-analytical galaxy formation model to estimate the global ionizing emissivity of high-z galaxies, which we use to compute the resulting reionization history. We find that both the global ionizing emissivity and reionization history match the observational constraints. Assuming that the low-z correlations hold during the epoch of reionization, we find that galaxies with $-16 lesssim M_{UV} lesssim -13.5$ are the main drivers of reionization. We derive a population-averaged $langle f_{esc} rangle simeq 8%, 10%, 20%$ at z=4.5, 6, 8." @default.
- W4311553102 created "2022-12-27" @default.
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- W4311553102 date "2023-01-05" @default.
- W4311553102 modified "2023-09-26" @default.
- W4311553102 title "Reionization with star-forming galaxies: insights from the Low-z Lyman Continuum Survey" @default.
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