Lyman Alpha Emitters at Redshift 5.7 in the COSMOS Field

Details Lyman Alpha Emitters at Redshift 5.7 in the COSMOS Field Lyman Alpha Emitters at Redshift 5.7 in the COSMOS Field

2007-02-18

arxiv.org/abs/astro-ph/0702458v1

Astronomy and Astrophysics

Astrophysics

26 pages, 19 figures. to appear in the ApJ Supplement COSMOS Special Issue

Scientific paper

10.1086/516597

We present results from a narrow-band optical survey of a contiguous area of 1.95 deg^2, covered by the Cosmic Evolution Survey (COSMOS). Both optical narrow-band (lambda_c = 8150 AA and Delta_lambda = 120 AA) and broad-band (B, V, g', r', i', and z') imaging observations were performed with the Subaru prime-focus camera, Suprime-Cam on the Subaru Telescope. We provide the largest contiguous narrow-band survey, targetting Ly alpha emitters (LAEs) at z~5.7. We find a total of 119 LAE candidates at z~5.7. Over the wide-area covered by this survey, we find no strong evidence for large scale clustering of LAEs. We estimate a star formation rate (SFR) density of ~7*10^-4 M_sun yr^-1 Mpc^-3 for LAEs at z~5.7, and compare it with previous measurements.

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