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

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

Jul 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...357l...9g&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 357, July 1, 1990, p. L9-L12. Research supported by AT&T Bell Lab

Astronomy and Astrophysics

Astrophysics

135

Dark Matter, Galactic Evolution, Red Shift, Charge Coupled Devices, Color-Color Diagram, Data Processing, Lyman Spectra

Scientific paper

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.

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