Detection of a clustering signal from Lyman α emitters in the range 3 < z < 6

by Tanya Urrutia on July 4, 2017

New paper by C. Diener et al.

Using the Lyman Alpha Emitters from the Herenz et al. sample (see previous blog post), we use pair-counts and detect a quite strong clustering signal already in this small 22 arcmin area. The signal is stronger and the correlation length is smaller than predicted by simulations, but within the errors of the survey.

Available here:

http://adsabs.harvard.edu/abs/2017MNRAS.471.3186D

We present a clustering analysis of a sample of 238 Ly α emitters at redshift 3 ≲ z ≲ 6 from the MUSE-Wide survey. This survey mosaics extragalactic legacy fields with 1h MUSE pointings to detect statistically relevant samples of emission line galaxies. We analysed the first year observations from MUSE-Wide making use of the clustering signal in the line-of-sight direction. This method relies on comparing pair-counts at close redshifts for a fixed transverse distance and thus exploits the full potential of the redshift range covered by our sample. A clear clustering signal with a correlation length of r₀=2.9^{+1.0}_{-1.1} Mpc (comoving) is detected. Whilst this result is based on only about a quarter of the full survey size, it already shows the immense potential of MUSE for efficiently observing and studying the clustering of Ly α emitters.

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