Projects per year
We investigate the possible influence of fluctuations in the metagalactic photoionizing ultraviolet background (UVBG) on the clustering of Lyα-emitting galaxies through the modulation of the ionization level of the gas surrounding the systems. At redshift z > 5, even when assuming the reionization of the intergalactic medium has completed, the fluctuations are sufficiently large that they may non-negligibly enhance, and possibly even dominate, the angular correlation function on scales up to a few hundred arcsecs. Whilst a comparison with observations at z ≃ 5.7 is statistically consistent with no influence of UVBG fluctuations, allowing for the fluctuations opens up the range of acceptable models to include those with relatively low bias factors for the Lyα-emitting galaxies. In this case, the evolution in the bias factor of Lyα-emitters over the approximate redshift range 3 < z < 7 corresponds to a nearly constant halo mass for Lyα-emitting galaxies of ∼1010.5 M⊙.
|Number of pages||10|
|Journal||Monthly Notices of the Royal Astronomical Society|
|Early online date||13 Aug 2022|
|Publication status||Published - 1 Oct 2022|
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- 1 Finished
Astronomy and Astrophysics at Edinburgh
Taylor, A., Best, P., Biller, B., Dunlop, J., Ivison, R., Khochfar, S., McLure, R. & Meiksin, A.
1/04/18 → 31/03/21