Lyα Emission‐Line Galaxies atz= 3.1 in the Extended Chandra Deep Field–South
The Astrophysical Journal2007Vol. 667(1), pp. 79–91
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C. Gronwall, Robin Ciardullo, Thomas J. Hickey, Eric Gawiser, John J. Feldmeier, Pieter van Dokkum, C. M. Urry, David Herrera, Bret Lehmer, L. Infante, Álvaro Orsi, Danilo Marchesini, Guillermo A. Blanc, Harold Francke, P. Lira, Ezequiel Treister
Abstract
We describe the results of an extremely deep, 0.28 deg 2 survey for z = 3.1 Lyα emission-line galaxies in the Extended Chandra Deep Field South. By using a narrow-band 5000 ˚A filter and complementary broadband photometry from the MUSYC survey, we identify a statistically complete sample of 162 galaxies with monochromatic fluxes brighter than 1.5×10 −17 ergs cm −2 s −1 and observers frame equivalent widths greater than 80 ˚A. We show that the equivalent width distribution of these objects follows an exponential with a rest-frame scale length of w0 = 76 +11 −8 ˚A. In addition, we show that in the emission line, the luminosity