Query : 2007A&A...468...25H

2007A&A...468...25H - Astronomy and Astrophysics, volume 468, 25-31 (2007/6-2)

Comparison between X-ray morphology and optical characteristics of clusters of galaxies.


Abstract (from CDS):

We quantitatively studied the X-ray cluster morphology, and then investigated the relationships between the cluster X-ray morphology and various cluster characteristics determined from the optical data. Using a sample of 101 clusters at redshift z∼0.05-1 taken from the Chandra archive, the X-ray morphology is characterized by a series of objectively-measured simple statistics of X-ray surface brightness, which are designed to be robust against variations of image quality caused by various exposure times and various cluster redshifts. The main conclusions from this work are: (1) X-ray morphologies of clusters show no significant correlation with optical richness, or related quantities. (2) X-ray morphologies of clusters are significantly correlated with the degree to which the brightest cluster member stands out against the cluster background. (3) X-ray morphologies of clusters are also correlated with optical concentration defined by galaxy distribution including fainter populations. (4) The ratio of the strong-lensing to X-ray mass measurements is correlated with the X-ray concentration, in that highly X-ray concentrated clusters show compatible strong-lensing and X-ray mass measurements, while those with low X-ray concentration show discrepancy between the two mass measurements.

Abstract Copyright:

Journal keyword(s): galaxies: clusters: general - X-rays: galaxies: clusters - galaxies: evolution

CDS comments: RX J1054 = CLG J1053+5735

Simbad objects: 3

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Number of rows : 3
N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
1 ClG J1053+5735 ClG 10 53 43.4 +57 35 21           ~ 28 1
2 ClG J1347-1145 ClG 13 47 33.5 -11 45 42           ~ 523 0
3 3C 295 Sy2 14 11 20.467 +52 12 09.52   22.34 20.80 18.54   ~ 955 5

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