منابع مشابه
Galaxy evolution in Abell 85 : I . Cluster substructure and environmental effects on the blue galaxy population
In this series of papers we explore the evolution of late-type galaxies in the rich cluster Abell 85. In this first paper we revisit the complex dynamical state of A 85 by using independent methods. First, we analyze the galaxy redshift distribution towards A 85 in the whole range 0–40,000 km s −1 , and determine the mean redshifts of the background clusters A 87 and A 89, very close in project...
متن کاملGravitational Lensing in Galaxy Cluster Abell 1689
Synopsis In this thesis we have set out to study the galaxy cluster Abell 1689 using strong grav-itational lensing. Due to its relative closeness at redshift 0.18 and available archived deep Hubble Space Telescope imaging it presents an ideal opportunity to several diverse studies based on strong gravitational lensing. We start with a brief introduction to cosmology and general relativity as we...
متن کاملROSAT HRI IMAGES OF ABELL 85 and ABELL 496 - EVIDENCE FOR INHOMOGENEITIES IN COOLING FLOWS
We present ROSAT HRI images of two clusters of galaxies with cooling flows, Abell 496 and Abell 85. In these clusters, X-ray emission on small scales above the general cluster emission is significant at the 3 a level. There is no evidence for optical counterparts. The enhancements'may be associated with lumps of gas -at a lower temperature and higher density than the ambient medium, or hotter, ...
متن کاملA photometric catalogue of galaxies in the cluster Abell 85 . ⋆ ⋆ ⋆
A photometric catalogue of galaxies in the cluster Abell 85. Abstract. We present two catalogues of galaxies in the direction of the rich cluster ABCG 85. The first one includes 4,232 galaxies located in a region ±1 • from the cluster centre. It has been obtained from a list of more than 25,000 galaxy candidates detected by scanning a Schmidt photographic plate taken in the B J band. Positions ...
متن کاملThe dwarf galaxy population in Abell 2218
We present results from a deep photometric study of the rich galaxy cluster Abell 2218 (z = 0.18) based on archival HST WFPC2 F606W images. These have been used to derive the luminosity function to extremely faint limits (MF606W ≈ −13.2 mag, μ0 ≈ 24.7mag arcsec ) over a wide field of view (1.3 h Mpc). We find the faint-end slope of the luminosity function to vary with environment within the clu...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2008
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361:200810731