Faintest Galaxy Morphologies from $HST$ WFPC2 Imaging of the Hawaii Survey Fields
Abstract
We present very deep 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 and, if this is correct, that these are large galaxies in the process of formation.
Keywords
Cite
@article{arxiv.astro-ph/9507055,
title = {Faintest Galaxy Morphologies from $HST$ WFPC2 Imaging of the Hawaii Survey Fields},
author = {Lennox L. Cowie and Esther M. Hu and Antoinette Songaila},
journal= {arXiv preprint arXiv:astro-ph/9507055},
year = {2009}
}
Comments
18 pages + 1 table of text as 1 LaTeX file (uses aastex style macros: aaspp.sty, flushrt.sty) plus 1 uuencoded compressed tar file of 12 PostScript figures (Figs. 3-9, 16-17, and 21-23). The remaining gray-scale plots are available by anonymous ftp at ftp://hubble.ifa.hawaii.edu/pub/preprints/plates To appear in the October 1995 Astronomical Journal