Faint Infrared-Excess Field Galaxies: FROGs

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dc.creatorMoustakas, L. A.
dc.creatorDavis, M.
dc.creatorZepf, S. E.
dc.creatorBunker, A. J.
dc.date1997-12-10
dc.date.accessioned2026-07-07T12:47:40Z
dc.date.available2026-07-07T12:47:40Z
dc.descriptionDeep near-infrared and optical imaging surveys in the field reveal a curious population of galaxies that are infrared-bright (I-K>4), yet with relatively blue optical colors (V-I<2). Their surface density, several per square arcminute at K>20, is high enough that if placed at z>1 as our models suggest, their space densities are about one-tenth of phi-*. The colors of these ``faint red outlier galaxies'' (fROGs) may derive from exceedingly old underlying stellar populations, a dust-embedded starburst or AGN, or a combination thereof. Determining the nature of these fROGs, and their relation with the I-K>6 ``extremely red objects,'' has implications for our understanding of the processes that give rise to infrared-excess galaxies in general. We report on an ongoing study of several targets with HST & Keck imaging and Keck/LRIS multislit spectroscopy.
dc.description4 pages, 2 postscript figures; uses paspconf & psfig. To appear in "The Young Universe: Galaxy Formation and Evolution at Intermediate and High Redshift," eds. S.D'Odorico, A.Fontana and E. Giallongo, A.S.P. Conf. Ser. Also available at ftp://coma.berkeley.edu/pub/lmoustakas/Rome_frogs/
dc.identifierhttps://arxiv.org/abs/astro-ph/9712135
dc.identifierhttp://arxiv.org/abs/astro-ph/9712135
dc.identifierASP Conf.Ser.146:210,1998
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/221795
dc.subjectAstrophysics
dc.titleFaint Infrared-Excess Field Galaxies: FROGs
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