Detection of systematic gravitational lens galaxy image alignments - Mapping dark matter in galaxy clusters

Tyson, J. A.; Valdés, F.; Wenk, R.A.

doi:10.1086/185636

Cited by 358 publications

(315 citation statements)

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“…In the 1990s, WL around individual massive halos was measured [387,388]. Soon after, WL by LSS was detected by four research groups in 2000 [389,390,391,392]; from then on, WL has grown into an increasingly accurate and powerful probe of dark matter and dark energy [393].…”

Section: Weak Lensingmentioning

confidence: 99%

Dark Energy

Li¹,

Li²,

Wang³

et al. 2011

Commun. Theor. Phys.

770

560

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Section: Weak Lensingmentioning

confidence: 99%

Dark Energy

Li¹,

Li²,

Wang³

et al. 2011

Commun. Theor. Phys.

770

560

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“…First, the gravitational lensing of distant objects yields an estimate of the projected mass distribution in the cluster (see, e.g., Tyson, Wenk, & Valdes 1990;Squires et al 1996). The mass density profile can subsequently be derived assuming the geometry of the cluster.…”

Section: Introductionmentioning

confidence: 99%

The ESO Nearby Abell Cluster Survey. XII. The Mass and Mass‐to‐Light Ratio Profiles of Rich Clusters

Katgert

Biviano

Mazure

2004

ApJ

117

173

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We determine the mass profile of an ensemble cluster built from 3056 galaxies in 59 nearby clusters observed in the ESO Nearby Abell Cluster Survey. The mass profile is derived from the distribution and kinematics of the early-type (elliptical and S0) galaxies only, with projected distances from the centers of their clusters 1.5r 200 . These galaxies are most likely to meet the conditions for the application of the Jeans equation, since they are the oldest cluster population and are thus quite likely to be in dynamical equilibrium with the cluster potential. In addition, the assumption that the early-type galaxies have isotropic orbits is supported by the shape of their velocity distribution. For galaxies of other types (the brightest elliptical galaxies, with M R À22 þ 5 log h, and the early and late spirals) these assumptions are much less likely to be satisfied. For the determination of the mass profile we also exclude early-type galaxies in subclusters. Application of the Jeans equation yields a nonparametric estimate of the cumulative mass profile M(

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“…Lensing studies have the advantage that they directly measure the total projected mass in all forms along the line of sight. In particular, the lensing mass includes both luminous and dark matter, independent of assumptions about the dynamical state of the cluster (Tyson, Valdes, & Wenk 1990;Kaiser & Squires 1993). …”

Section: Introductionmentioning

confidence: 99%

ChandraX‐Ray Spectroscopy and Imaging of the Galaxy Cluster PKS 0745−191

Hicks

Wise

Houck

et al. 2002

ApJ

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We present a detailed spectral and spatial analysis of the galaxy cluster PKS 0745À191, using recent observations from the Chandra X-Ray Observatory. The data provide information on the temperature and metallicity of the intracluster medium, the distribution of emission throughout the cluster, morphology of the cluster core, and an independent mass estimate that can be compared to that from gravitational lensing. X-ray spectra extracted from the central 300 kpc ($2 0 ) are well described by a two-temperature plasma, and the mean cluster temperature is consistent with previously determined values. The distribution of both temperature and metallicity within the inner 360 kpc (2<3) of PKS 0745À191 is probed on scales of 8 00 ($20 kpc), yielding a relatively constant abundance throughout the region and a strong temperature gradient (down to $4-5 keV) within the central 215 kpc. -model fits to the surface brightness profile of PKS 0745À191 indicate that a second -model component is required to fit the inner $10 kpc. Imaging analysis of the cluster core reveals an irregular morphology within the inner 50 kpc and confirms that the X-ray emission peak lies within 0>5 (the spatial resolution of Chandra) of both the optical and radio central cD positions. The cluster mass, based on both two-temperature and multiphase fits to the X-ray spectrum, is in close agreement with lensing mass estimates of PKS 0745À191.

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Detection of systematic gravitational lens galaxy image alignments - Mapping dark matter in galaxy clusters

Cited by 358 publications

References 0 publications

Dark Energy

Dark Energy

The ESO Nearby Abell Cluster Survey. XII. The Mass and Mass‐to‐Light Ratio Profiles of Rich Clusters

ChandraX‐Ray Spectroscopy and Imaging of the Galaxy Cluster PKS 0745−191

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