/ftp/cats/aliases/P/./PMD2011



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J/MNRAS/418/2054  Recession velocities for fossil galaxy groups (Proctor+, 2011)
The following files can be converted to FITS (extension .fit or fit.gz)
	tableb.dat
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Query from: http://vizier.cds.unistra.fr/viz-bin/VizieR?-source=J/MNRAS/418/2054
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Beginning of ReadMe : J/MNRAS/418/2054 Recession velocities for fossil galaxy groups (Proctor+, 2011) ================================================================================ On the mass-to-light ratios of fossil groups. Are they simply dark clusters? Proctor R.N., Mendes De Oliveira C., Dupke R., Lopes De Oliveira R., Cypriano E.S., Miller E.D., Rykoff E. <Mon. Not. R. Astron. Soc., 418, 2054-2073 (2011)> =2011MNRAS.418.2054P ================================================================================ ADC_Keywords: Clusters, galaxy ; Radial velocities ; Photometry, SDSS Keywords: galaxies: clusters: general - galaxies: groups: general - X-rays: galaxies: clusters Abstract: Defined as X-ray bright galaxy groups with large differences between the luminosities of their brightest and second brightest galaxies, "fossil groups" are believed to be some of the oldest galaxy systems in the Universe. They have therefore been the subject of much recent research. In this work we present a study of 10 fossil group candidates with an average of 33 spectroscopically confirmed members per group, making this the deepest study of its type to date. We also use these data to perform an analysis of the luminosity function of our sample of fossil groups. Description: The Magellan Baade telescope multi-object spectroscopy of five candidate fossil groups selected from the maxBCG catalogue was carried out on the f/2 camera of the IMACS instrument in 2009 February. The Gemini GMOS spectroscopic observations of RX J1256.0+2556 were carried out on Gemini North on 2006 June 24. Observations of RX J1331.5+1108 were carried out on Gemini North on 2005 March 7.