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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/28304
Title: Characterization of Omega-WINGS galaxy clusters. I. Stellar light and mass profiles
Authors: Cariddi, S.
D'Onofrio, M.
Fasano, G.
POGGIANTI, Bianca Maria 
MORETTI, ALESSIA 
GULLIEUSZIK, MARCO 
BETTONI, Daniela 
Sciarratta, M.
Issue Date: 2018
Journal: ASTRONOMY & ASTROPHYSICS 
Number: 609
First Page: A133
Abstract: Context. Galaxy clusters are the largest virialized structures in the observable Universe. Knowledge of their properties provides many useful astrophysical and cosmological information. Aims: Our aim is to derive the luminosity and stellar mass profiles of the nearby galaxy clusters of the Omega-WINGS survey and to study the main scaling relations valid for such systems. Methods: We merged data from the WINGS and Omega-WINGS databases, sorted the sources according to the distance from the brightest cluster galaxy (BCG), and calculated the integrated luminosity profiles in the B and V bands, taking into account extinction, photometric and spatial completeness, K correction, and background contribution. Then, by exploiting the spectroscopic sample we derived the stellar mass profiles of the clusters. <BR /> Results: We obtained the luminosity profiles of 46 galaxy clusters, reaching r<SUB>200</SUB> in 30 cases, and the stellar mass profiles of 42 of our objects. We successfully fitted all the integrated luminosity growth profiles with one or two embedded Sérsic components, deriving the main clusters parameters. Finally, we checked the main scaling relation among the clusters parameters in comparison with those obtained for a selected sample of early-type galaxies (ETGs) of the same clusters. <BR /> Conclusions: We found that the nearby galaxy clusters are non-homologous structures such as ETGs and exhibit a color-magnitude (CM) red-sequence relation very similar to that observed for galaxies in clusters. These properties are not expected in the current cluster formation scenarios. In particular the existence of a CM relation for clusters, shown here for the first time, suggests that the baryonic structures grow and evolve in a similar way at all scales.
URI: http://hdl.handle.net/20.500.12386/28304
URL: https://www.aanda.org/articles/aa/abs/2018/01/aa31605-17/aa31605-17.html
ISSN: 0004-6361
DOI: 10.1051/0004-6361/201731605
Bibcode ADS: 2018A&A...609A.133C
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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