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Faintest Galaxy Morphologies from $HST$ WFPC2 Imaging of the Hawaii Survey Fields | | Lennox L. Cowie
; Esther M. Hu
; Antoinette Songaila
; | | Date: |
14 Jul 1995 | | Journal: | Astron.J. 110 (1995) 1576-1583 | | 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. | | Source: | arXiv, astro-ph/9507055 | | Services: | Forum | Review | PDF | Favorites | |
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