A redshift limit for the faint blue galaxy population from deep U band imaging

Journal Article · Sun Jul 01 04:00:00 EDT 1990 · Astrophysical Journal; (USA)

DOI:https://doi.org/10.1086/185754· OSTI ID:6576997

Guhathakurta, P; Tyson, J A; Majewski, S R ^[1]

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1. Institute for Advanced Study, NJ (USA) AT T Bell Laboratories, Murray Hill, NJ (USA) Yerkes Observatory, Williams Bay, WI (USA)

A definitive upper limit for the redshift of the population of faint blue galaxies found in deep imaging surveys is obtained. The U-B(j), and particularly the B(j)-R, colors of these objects show a blueing trend toward fainter magnitudes. A typical galaxy at R = 26 has colors that are only slightly redder than a flat spectrum. For any reasonable Lyman limit break, this constrains 93 percent or more of the galaxies to under z about 3, beyond which the break gets redshifted through the U band. The galaxies appear to be undergoing relatively recent evolution with rest frame spectra that are approximately flat down to the Lyman limit. 23 refs.

• OSTI ID: 6576997
• Journal Information: Astrophysical Journal; (USA), Journal Name: Astrophysical Journal; (USA) Vol. 357; ISSN ASJOA; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CHARGE-COUPLED DEVICES
DATA PROCESSING
GALACTIC EVOLUTION
GALAXIES
LIMITING VALUES
LYMAN LINES
NONLUMINOUS MATTER
PROCESSING
RED SHIFT
SEMICONDUCTOR DEVICES