Galaxy Morphology from NICMOS Parallel Imaging

Abstract

We present high resolution NICMOS images of random fields obtained in parallel to other HST observations. We present galaxy number counts reaching H=24. The H-band galaxy counts show good agreement with the deepest I- and K-band counts obtained from ground-based data. We present the distribution of galaxies with morphological type to H<23. We find relatively fewer irregular galaxies compared to an I-band sample from the Hubble Deep Field, which we attribute to their blue color, rather than to morphological K-corrections. We conclude that the irregulars are intrinsically faint blue galaxies at z<1.

13 pages, including 4 figures. Accepted for publication in ApJ Letters

References in corpus (5)

• Keck Spectroscopy of Redshift z~3 Galaxies in the Hubble Deep Field
• Faint Blue Galaxies
• Near-Infrared Galaxy Counts to J and K ~ 24 as a Function of Image Size
• Deep H-band Galaxy Counts and Half-light Radii from HST/NICMOS Parallel Observations
• An Extendable Galaxy Number Count Model

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