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Evolution of Lya Emitting Galaxies: Insights From a Flux-Limited GALEX Sample at 1
Wold, Isak ( University of Wisconsin Madison ) show affiliations
American Astronomical Society, AAS Meeting #221, #227.02
Published in Jan 2013
Lya emission is a primary tool for studying the highest redshift galaxies, making the study of Lya emitters (LAEs) a very active field for objects at z>2. Recently, GALEX FUV grism data have enabled the properties of 0.3 LAEs to be studied in detail. Bridging the gap between these low and high-redshift studies, we have obtained a large, flux-limited sample of LAEs at 1 using a novel three-dimensional (two spatial axes and one wavelength axis) data cube search method that we developed for GALEX NUV grism data. Eliminating UV, X-ray, and optically identified active galactic nuclei from the sample, I compute the 1 Lya luminosity function and show the dramatic evolution seen in this population. I also discuss our efforts to learn more about the properties of these galaxies, which appear to be in the early stages of formation.
(c) 2013: American Astronomical Society