Abstract
view Abstract Citations (41) References (14) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Hubble Space Telescope Observations of the Distant Cluster CL 0016+16: Quantitative Morphology of Confirmed Cluster Members Wirth, Gregory D. ; Koo, David C. ; Kron, Richard G. Abstract We present Hubble Space Telescope (HST) images of 24 confirmed members of the distant galaxy cluster Cl 0016+16 at redshift 0.55. The Balmer- strong ("E + A") and emission-line galaxies frequently show unusual visual morphology, implying that galaxian interactions produce "active" galaxies in moderate-redshift clusters. We use an image concentration index as a quantitative measure of morphology to show that these unusual galaxies appear disklike, while the normal red galaxies resemble E/S0 galaxies. Although consistent with HST observations by Dressler et al. in Cl 0939+4713 (z = 0.41), our results differ from the Couch et al. finding that most Balmer-strong galaxies in AC 114 (z = 0.31) resemble ellipticals. The entire "E + A" sample is small, but if future studies confirm their diversity, it will suggest that they have different origins. Publication: The Astrophysical Journal Pub Date: November 1994 DOI: 10.1086/187605 arXiv: arXiv:astro-ph/9409037 Bibcode: 1994ApJ...435L.105W Keywords: Galactic Clusters; Galactic Evolution; Galactic Structure; Morphology; Red Shift; Astronomical Photometry; Balmer Series; Emission Spectra; Hubble Space Telescope; Luminosity; Satellite Instruments; Astronomy; GALAXIES: CLUSTERS OF; GALAXIES: EVOLUTION; GALAXIES: PHOTOMETRY; GALAXIES: STRUCTURE; Astrophysics E-Print: 11 pages, uuencoded compressed PostScript, accepted to ApJ Letters, LICK-32 full text sources arXiv | ADS | data products SIMBAD (26) NED (25) MAST (1) ESA (1)
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