UV Imaging of the Galaxy Cluster CL0939+4713 (Abell 851) at z=0.41
arXiv:astro-ph/9910094 · doi:10.1086/308517
Abstract
The first UV F300W and F218W WFPC2 observations of the rich galaxy cluster CL0939+4713 at z=0.41 are presented and discussed. UV/optical two-color and c-m diagrams of the sources detected in the F300W waveband are constructed. Thanks to pre-existing HST optical images of the same field a morphological classification for the majority of these objects is also provided. Moreover, taking advantage of recent redshift surveys along CL0939+4713 line of sight, separate diagrams comparing the properties of galaxies belonging to the cluster and to its close projected field are presented. Possible evolutionary effects in the UV from z~0.4 to present time are investigated by comparing the restframe [mid-UV-Optical] colors of galaxies in CL0939+4713 with balloon-borne data of the Coma cluster, as well as by resorting to suitable galaxy evolution models. Finally, current attempts to constrain the epoch of the UV-upturn onset in evolved populations by means of HST UV observations are discussed.
arXiv comment20 pages, LaTeX, with 6 PostScript figures, Submitted to The Astrophysical Journal, Figures 1 and 2 have lower resolution than the ApJ submitted version
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Cited by in corpus (6)
- How young are early-type cluster galaxies ? Quantifying the young stellar component in a rich cluster at z=0.41
- Red Star Forming Galaxies and Their Environment at z=0.4 Revealed by Panoramic H-alpha Imaging
- Age and Abundance Discrimination in Old Stellar Populations Using Mid-Ultraviolet Colors
- UV observations of the galaxy cluster Abell 1795 with the optical monitor on XMM-Newton
- XMM observation of the dynamically young galaxy cluster CL 0939+4713
- Feedback Processes in Early-Type Galaxies