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Paper: WISE Discovery of Hyper Luminous Galaxies at z=2-4 and Their Implications for Galaxy and AGN Evolution
Volume: 477, Galaxy Mergers in an Evolving Universe
Page: 247
Authors: Tsai, C.; Eisenhardt, P.; Wu, J.; Bridge, C.; Assef, R.; Benford, D.; Blain, A.; Cutri, R.; Griffith, R. L.; Jarrett, T.; Lonsdale, C.; Petty, S.; Sayers, J.; Stanford, A.; Stern, D.; Wright, E. L.; Yan, L.
Abstract: On behalf of the WISE Science team, we present the discovery of a class of distant dust-enshrouded galaxies with extremely high luminosity. These galaxies are selected to have extreme red colors in the mid-IR using NASA's Wide-field Infrared Survey Explorer (WISE). They are faint in the optical and near-IR, predominantly at z=2-4, and with IR luminosity > 1013 L, making them Hyper-Luminous Infrared Galaxies (HyLIRGs). SEDs incorporating the WISE, Spitzer, and Herschel PACS and SPIRE photometry indicate hot dust dominates the bolometric luminosity, presumably powered by AGN. Preliminary multi-wavelength follow-up suggests that they are different from normal populations in the local M-sigma relation. Their low source density implies that these objects are either intrinsically rare, or a short-lived phase in a more numerous population. If the latter is the case, these hot, dust-enshrouded galaxies may be an early stage in the interplay between AGN and galaxies.
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