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Title:
Faintest Galaxy Morphologies From HST WFPC2 Imaging of the Hawaii Survey Fields
Authors:
Cowie, Lennox L.; Hu, Esther M.; Songaila, Antoinette
Publication:
Astronomical Journal v.110, p.1576 (AJ Homepage)
Publication Date:
10/1995
Origin:
AJ; KNUDSEN
AJ/ApJ Keywords:
GALAXIES: EVOLUTION, GALAXIES: FUNDAMENTAL PARAMETERS
DOI:
10.1086/117631
Bibliographic Code:
1995AJ....110.1576C

Abstract

We present very deep HST WFPC2 images in the F814W filter of two Hawaii Survey fields, SSA13 and SSA22. Using these data with previous ground- based imaging and spectroscopy, we compare the colors, star-forming properties, and morphologies of the faintest galaxies with a reference sample of bright nearby galaxies and analyze the changes in field galaxy morphology with magnitude. Our principal result is the identification of a new morphological class of "chain" galaxies at the faintest magnitudes. Based on limited spectroscopy, we tentatively conclude that these are linearly organized giant star-forming regions at z = 0.5-3 and, if this is correct, that these are large galaxies in the process of formation.

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