2001/02/08 by Sangeeta Malhotra, James Rhoads, James E. Rhoads +11
Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysics (astro-ph) #FOS: Physical sciences #Galaxies: Formation, Evolution, Phenomena #Radio Astronomy Observations and Technology #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/0102140
5 pages, 1 figure, To appear in ``Gas and Galaxy Evolution,'' eds. J.E. Hibbard, M.P. Rupen, & J.H. van Gorkom, ASP Conference Series (VLA 20th Anniversary Conference)
arxiv created 2001/02/08 · openalex publication_date 2001/02/08 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Strong Lyman-alpha emission is a signpost of young stars and the absence of dust and thus indicates young galaxies. To find such a population of young galaxies at z=4.5 we started the Large Area Lyman Alpha survey (LALA). This survey achieves an unprecedented combination of volume and sensitivity by using narrow-band filters on a large format (36x36 square-arcminutes) camera on the 4 meter telescope at KPNO. The volume density and star-formation contribution of the Lyman-alpha emitters at z=4.5 is comparable to that of Lyman break galaxies. With many candidates and a few spectroscopic confirmations in hand we discuss what the properties of Ly-alpha emitters imply for galaxy and star formation in the early universe.