Detecting filaments at z=3

Details Detecting filaments at z=3 Detecting filaments at z=3

2001-10-29

arxiv.org/abs/astro-ph/0110604v1

Astronomy and Astrophysics

Astrophysics

7 pages, 4 figures, contribution to the procedings of the conference ``Lighthouses of the Universe'' held in Garching (Germany

Scientific paper

10.1007/10856495_78

We present the detection of a filament of Ly-alpha emitting galaxies in front of the quasar Q1205-30 at z=3.04 based on deep narrow band imaging and follow-up spectroscopy obtained at the ESO NTT and VLT. We argue that Ly-alpha selection of high redshift galaxies with relatively modest amounts of observing time allows the detection and redshift measurement of galaxies with sufficiently high space densities that we can start to map out the large scale structure at z=2-3 directly. Even more interesting is it that a 3D map of the filaments will provide a new cosmological test for the value of the cosmological constant, Omega_Lambda.

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