Low X-Ray Luminosity Galaxy Clusters. II. Optical properties and morphological content at 0.18 < z < 0.70
| Autor: | A. Ramirez, Carlos Valotto, José Luis Nilo Castellón, Diego G. Lambas, Ana Laura O'Mill, Eleazar R. Carrasco, M. Victoria Alonso, H. Cuevas |
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| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: |
Physics
Ciencias Físicas Astronomy Astronomy and Astrophysics Astrophysics purl.org/becyt/ford/1.3 [https] Astrophysics::Cosmology and Extragalactic Astrophysics OPTICAL Galaxy Luminosity GALAXY purl.org/becyt/ford/1 [https] Astronomía Space and Planetary Science Content (measure theory) LUMINOSITY Astrophysics::Solar and Stellar Astrophysics CLUSTERS Galaxy cluster CIENCIAS NATURALES Y EXACTAS Astrophysics::Galaxy Astrophysics Astrophysics - Cosmology and Nongalactic Astrophysics |
| Zdroj: | CONICET Digital (CONICET) Consejo Nacional de Investigaciones Científicas y Técnicas instacron:CONICET |
| Popis: | This is the second of a series of papers on low X-ray luminosity galaxy clusters, in which we present the $r^\prime$, $g^\prime$ and $i^\prime$ photometry obtained with GMOS-IMAGE at Gemini North and South telescopes for seven systems in the redshift range of 0.18 to 0.70. Optical magnitudes, colours and morphological parameters, namely, concentration index, ellipticity and visual morphological classification, are also given. At lower redshifts, the presence of a well-defined red cluster sequence extending by more than 4 magnitudes showed that these intermediate-mass clusters had reached a relaxed stage. This was confirmed by the small fraction of blue galaxy members observed in the central regions of $\sim$ 0.75 Mpc. In contrast, galaxy clusters at higher redshifts had a less important red cluster sequence. We also found that the galaxy radial density profiles in these clusters were well fitted by a single power law. At 0.18 $ Comment: 16 pages, 13 figures, 5 tables. Accepted for publication in MNRAS |
| Databáze: | OpenAIRE |
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