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A Glimpse of Field Galaxies at Redshifts z ∼ 1 using HST and the Keck Telescope

Published online by Cambridge University Press:  25 May 2016

D. C. Koo
D. C. Koo*
Affiliation:
UCO/Lick Obs. and Board of Astronomy and Astrophysics, University of California, Santa Cruz, CA 95064 USA

Abstract

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Data from the Keck and Hubble Space Telescopes have been combined to explore the nature of very faint I > 22 field galaxies. At a redshift z ∼ 1, such galaxies have luminosities similar to that of typical galaxies today. Though small, our sample of 33 redshifts already suggest that the median redshift for I > 22 galaxies is higher than the z = 0.6 expected for the “maximum merger model” of Carlberg (1995). At redshifts z > 0.8, mergers, interactions, and infall of minor galaxies into larger hosts appear to be common events; a wide diversity of morphological types existed; and some stellar populations were already so red that their major formation epoch occurred at redshifts z > 2.

Type
High Redshift Galaxies
Information
Symposium - International Astronomical Union , Volume 171: New Light on Galaxy Evolution , 1996 , pp. 217 - 220
Copyright
Copyright © Kluwer 1996 

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