1998/12/15 by Kenneth M. Lanzetta, Lanzetta, Kenneth M., Hsiao-Wen Chen +7
Physics and Astronomy · #Adaptive optics and wavefront sensing #Astronomy and Astrophysical Research #Galaxies: Formation, Evolution, Phenomena #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/9812272
8 pages, 4 figures, invited review for IAU Colloquium 171, The Low Surface Brightness Universe
arxiv created 1998/12/15 · arxiv updated 2009/12/01
Here we describe results of our attempt to determine what types of galaxies are responsible for the Lyman-alpha forest absorption systems, based on our ongoing imaging and spectroscopic survey of faint galaxies in fields of HST spectroscopic target QSOs. Our primary conclusions are that the bulk of the Lyman-alpha forest arises in more or less normal galaxies (that span the normal range of luminosity and morphology) and that any ``unseen'' low surface brightness galaxies are unlikely to contribute significantly to the luminosity density of the universe.