Group items tagged clusters - Gravitational Lensing

The Survival of Dark Matter Halos in the Cluster Cl 0024+16, P. Natarajan, J.-P. Kneib,... - 0 views

adsabs.harvard.edu/...2009ApJ...693..970N

advanced strong clusters paper

shared by Tommaso Treu on 30 May 12 - No Cached

Tommaso Treu on 30 May 12

This study of dark matter substructure in a cluster of galaxies, using both strong and weak lensing, covered an unprecedently wide dynamic range of cluster mass density and infalling group environments, and provided comparison with simulations regarding the cluster dark matter density profile. (A)

<div class="cArrow"> </div><div class="cContentInner">This study of dark matter substructure in a cluster of galaxies, using both strong and weak lensing, covered an unprecedently wide dynamic range of cluster mass density and infalling group environments, and provided comparison with simulations regarding the cluster dark matter density profile. (A)</div>

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Subaru Weak Lensing Measurements of Four Strong Lensing Clusters: Are Lensing Clusters ... - 0 views

adsabs.harvard.edu/...2009ApJ...699.1038O

advanced paper weak clusters

shared by Phil Marshall on 02 Jun 12 - No Cached

Phil Marshall on 02 Jun 12

This paper investigates an error that pervades mass measurements with weak lensing, namely the assumption of a spherical mass model when fitting a non-spherical system. It explores whether the departure from the expected concentrations of certain clusters is a result of this effect. (A)

<div class="cArrow"> </div><div class="cContentInner">This paper investigates an error that pervades mass measurements with weak lensing, namely the assumption of a spherical mass model when fitting a non-spherical system. It explores whether the departure from the expected concentrations of certain clusters is a result of this effect. (A)</div>

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LoCuSS: comparison of observed X-ray and lensing galaxy cluster scaling relations with ... - 0 views

adsabs.harvard.edu/...2008A%26A...482..451Z

advanced paper weak clusters

shared by Phil Marshall on 02 Jun 12 - No Cached

Phil Marshall on 02 Jun 12

LoCuSS is a large sample of nearby galaxy clusters with good weak lensing and X-ray measurements; Zhang, et al., use these clusters to investigate the agreement between mass estimates based on X-ray and weak lensing, and provide a good discussion of potential sources of errors in both of these methods.

<div class="cArrow"> </div><div class="cContentInner">LoCuSS is a large sample of nearby galaxy clusters with good weak lensing and X-ray measurements; Zhang, et al., use these clusters to investigate the agreement between mass estimates based on X-ray and weak lensing, and provide a good discussion of potential sources of errors in both of these methods.</div>

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A comparison of weak-lensing masses and X-ray properties of galaxy clusters, H. Hoekstr... - 0 views

adsabs.harvard.edu/...2007MNRAS.379..317H

advanced paper weak clusters

shared by Phil Marshall on 02 Jun 12 - No Cached

Phil Marshall on 02 Jun 12

This paper compares mass measurements from weak lensing and X-ray observations for a large sample of clusters, also providing a good discussion of the differences among various methods of measuring the cluster mass just with weak-lensing data.

<div class="cArrow"> </div><div class="cContentInner">This paper compares mass measurements from weak lensing and X-ray observations for a large sample of clusters, also providing a good discussion of the differences among various methods of measuring the cluster mass just with weak-lensing data.</div>

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Strong and Weak Lensing United. III. Measuring the Mass Distribution of the Merging Gal... - 0 views

adsabs.harvard.edu/...2006ApJ...652..937B

advanced strong weak paper clusters

shared by Phil Marshall on 02 Jun 12 - No Cached

Phil Marshall on 02 Jun 12

This paper describes further mass measurements of a particular merging cluster system, the "Bullet Cluster," showing how gravitational lensing can be used to measure the mass of a structure that is not in dynamical equilibrium, and without assuming that "mass follows light." Strong lensing information is combined in a joint analysis, improving the accuracy of the mass peak positions.

<div class="cArrow"> </div><div class="cContentInner">This paper describes further mass measurements of a particular merging cluster system, the "Bullet Cluster," showing how gravitational lensing can be used to measure the mass of a structure that is not in dynamical equilibrium, and without assuming that "mass follows light." Strong lensing information is combined in a joint analysis, improving the accuracy of the mass peak positions.</div>

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A blue ring-like structure, in the center of the A 370 cluster of galaxies, G. Soucail,... - 0 views

adsabs.harvard.edu/...1987A%26A...172L..14S

advanced strong paper clusters

shared by Tommaso Treu on 30 May 12 - No Cached

Tommaso Treu on 30 May 12

The discovery of the first giant arcs is described in this classic paper; it marks the beginning of the study of cluster strong lenses as cosmic telescopes. (A)

<div class="cArrow"> </div><div class="cContentInner">The discovery of the first giant arcs is described in this classic paper; it marks the beginning of the study of cluster strong lenses as cosmic telescopes. (A)</div>

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A Direct Empirical Proof of the Existence of Dark Matter, D. Clowe, et al., Astrophys. ... - 0 views

adsabs.harvard.edu/...2006ApJ...648L.109C

advanced paper weak clusters

shared by Phil Marshall on 02 Jun 12 - No Cached

Phil Marshall on 02 Jun 12

This paper describes mass measurements of a particular merging cluster system, the "Bullet Cluster," showing how gravitational lensing can be used to measure the mass of a structure that is not in dynamical equilibrium, and without assuming that "mass follows light." (In this case, it does not!) It also demonstrates how noise in the weak-lensing data can affect the centers of the inferred two-dimensional mass distributions.

<div class="cArrow"> </div><div class="cContentInner">This paper describes mass measurements of a particular merging cluster system, the "Bullet Cluster," showing how gravitational lensing can be used to measure the mass of a structure that is not in dynamical equilibrium, and without assuming that "mass follows light." (In this case, it does not!) It also demonstrates how noise in the weak-lensing data can affect the centers of the inferred two-dimensional mass distributions.</div>

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The Mass-Lx Relation for Moderate Luminosity X-ray Clusters, H. Hoekstra, M. Donahue, C... - 0 views

adsabs.harvard.edu/...2011ApJ...726...48H

advanced weak paper clusters

shared by Phil Marshall on 02 Jun 12 - No Cached

Phil Marshall on 02 Jun 12

This paper compares mass measurements from weak lensing and X-ray observations for a large sample of clusters.

<div class="cArrow"> </div><div class="cContentInner">This paper compares mass measurements from weak lensing and X-ray observations for a large sample of clusters.</div>

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First Results on Shear-selected Clusters from the Deep Lens Survey: Optical Imaging, Sp... - 0 views

adsabs.harvard.edu/...2006ApJ...643..128W

advanced weak paper clusters

shared by Douglas Clowe on 03 Jun 12 - No Cached

Douglas Clowe on 03 Jun 12

This paper describes an attempt to detect clusters by mass in a blank-field survey, thereby avoiding selection bias when measuring the evolution of the mass function. (A)

<div class="cArrow"> </div><div class="cContentInner">This paper describes an attempt to detect clusters by mass in a blank-field survey, thereby avoiding selection bias when measuring the evolution of the mass function. (A)</div>

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Cluster Lenses: J.-P. Kneib, P. Natarajan, Astron Astrophys Rev, 19, 47-146 (2011) - 0 views

www.springerlink.com/...j183018170485723

advanced clusters strong review

shared by Phil Marshall on 16 Jan 12 - No Cached

Phil Marshall on 16 Jan 12

This recent comprehensive review, covers strong and weak lensing theory an observations, focusing on galaxy clusters as deflectors. (A)

<div class="cArrow"> </div><div class="cContentInner">This recent comprehensive review, covers strong and weak lensing theory an observations, focusing on galaxy clusters as deflectors. (A)</div>

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The Dark Matter Distribution in A383: Evidence for a Shallow Density Cusp from Improved... - 0 views

adsabs.harvard.edu/...2011ApJ...728L..39N

advanced strong clusters paper

shared by Tommaso Treu on 30 May 12 - No Cached

Tommaso Treu on 30 May 12

A good example of astronomers attempting to combine information from several sources to constrain a self-consistent model of a cluster gravitational potential. (A)

<div class="cArrow"> </div><div class="cContentInner">A good example of astronomers attempting to combine information from several sources to constrain a self-consistent model of a cluster gravitational potential. (A)</div>

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A Bayesian approach to strong lensing modelling of galaxy clusters, E. Jullo, J.-P. Kne... - 0 views

adsabs.harvard.edu/...2007NJPh....9..447J

advanced strong clusters paper modeling

shared by Tommaso Treu on 30 May 12 - No Cached

Tommaso Treu on 30 May 12

LensTool has been used extensively throughout the literature; this paper provides a good introduction and an overview of its more recently added capabilities. (A)

<div class="cArrow"> </div><div class="cContentInner">LensTool has been used extensively throughout the literature; this paper provides a good introduction and an overview of its more recently added capabilities. (A)</div>

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LensTool, J.-P. Kneib and E. Jullo - 0 views

www.oamp.fr/lenstool

advanced strong clusters modeling software

shared by Tommaso Treu on 30 May 12 - No Cached

Tommaso Treu on 30 May 12

The lens and source models are similar to GravLens, but exploration of the parameter space proceeds differently, to cope with the more complex cluster systems. The options are manual iteration (for which a graphical interface is provided), and Markov Chain Monte Carlo sampling. Weak lensing data can also be included in a joint fit. (A)

<div class="cArrow"> </div><div class="cContentInner">The lens and source models are similar to GravLens, but exploration of the parameter space proceeds differently, to cope with the more complex cluster systems. The options are manual iteration (for which a graphical interface is provided), and Markov Chain Monte Carlo sampling. Weak lensing data can also be included in a joint fit. (A)</div>

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A New Survey for Giant Arcs, J. F. Hennawi, et al., Astronom J. 135, 664-681 (2008) - 0 views

adsabs.harvard.edu/...2008AJ....135..664H

advanced strong paper surveys

shared by Tommaso Treu on 30 May 12 - No Cached

Tommaso Treu on 30 May 12

Gravitational lensing on the cluster scale is readily observed in almost all of the most massive systems, provided the image resolution and depth are high enough. "Blind" imaging surveys have also been carried out, most notably using SDSS data. Describes the candidate selection and confirmation of 16 new cluster-scale lenses. (A)

<div class="cArrow"> </div><div class="cContentInner">Gravitational lensing on the cluster scale is readily observed in almost all of the most massive systems, provided the image resolution and depth are high enough. "Blind" imaging surveys have also been carried out, most notably using SDSS data. Describes the candidate selection and confirmation of 16 new cluster-scale lenses. (A)</div>

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Effects of asphericity and substructure on the determination of cluster mass with weak ... - 0 views

adsabs.harvard.edu/...2004MNRAS.350.1038C

advanced weak paper clusters

shared by Phil Marshall on 02 Jun 12 - No Cached

Phil Marshall on 02 Jun 12

This paper investigates an error that pervades mass measurements with weak lensing, namely the assumption of a spherical mass model when fitting a non-spherical system. It gives theoretical expectations of the effect from N-body simulations and analytic tri-axial mass models. (A)

<div class="cArrow"> </div><div class="cContentInner">This paper investigates an error that pervades mass measurements with weak lensing, namely the assumption of a spherical mass model when fitting a non-spherical system. It gives theoretical expectations of the effect from N-body simulations and analytic tri-axial mass models. (A)</div>

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Mapping Dark Matter with Gravitational Lenses: J. A. Tyson, Physics Today, Jun. 1992, ... - 0 views

www.physicstoday.org/...p24_s1

advanced intermediate strong clusters

shared by Phil Marshall on 14 Jan 12 - No Cached

Phil Marshall on 14 Jan 12

Introduces and explains the process of inferring a cluster of galaxies' mass distribution, from weak shear data. (I, A)

<div class="cArrow"> </div><div class="cContentInner">Introduces and explains the process of inferring a cluster of galaxies' mass distribution, from weak shear data. (I, A)</div>

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Nebulae as gravitational lenses: F. Zwicky, Phys. Rev. 51, 290-290 (1937) - 0 views

dx.doi.org/PhysRev.51.290

advanced clusters galaxies strong paper history

shared by Phil Marshall on 14 Jan 12 - No Cached

Phil Marshall on 14 Jan 12

The deflection of during an eclipse was the first observation of lensing in the universe, but there would not be another for 60 years. However, in the 1930s, Fritz Zwicky predicted that galaxies and clusters of galaxies would make good gravitational lenses as well, in this prescient paper. (A)

<div class="cArrow"> </div><div class="cContentInner">The deflection of during an eclipse was the first observation of lensing in the universe, but there would not be another for 60 years. However, in the 1930s, Fritz Zwicky predicted that galaxies and clusters of galaxies would make good gravitational lenses as well, in this prescient paper. (A)</div>

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Worlds Collide: The New York Times, 23 August 2006. - 0 views

www.nytimes.com/...23darkfloater.html

elementary weak strong news

shared by Phil Marshall on 30 Apr 12 - No Cached

Phil Marshall on 30 Apr 12

COSMOS was by no means the first time that dark matter mapping with gravitational lensing had attracted publicity. The year before, the lensing analysis of the Bullet Cluster was picked up as providing the "proof" of dark matter's existence. (E)

<div class="cArrow"> </div><div class="cContentInner">COSMOS was by no means the first time that dark matter mapping with gravitational lensing had attracted publicity. The year before, the lensing analysis of the Bullet Cluster was picked up as providing the "proof" of dark matter's existence. (E)</div>

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Reconstruction of Cluster Masses Using Particle based Lensing. I. Application to Weak L... - 0 views

adsabs.harvard.edu/...2008ApJ...687...39D

advanced weak paper

shared by Douglas Clowe on 28 May 12 - No Cached

Douglas Clowe on 28 May 12

This paper introduces a maximum likelihood algorithm for weak lensing mass reconstruction using a particle based method instead of the more conventional grid based method (A).

<div class="cArrow"> </div><div class="cContentInner">This paper introduces a maximum likelihood algorithm for weak lensing mass reconstruction using a particle based method instead of the more conventional grid based method (A).</div>

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The formation and assembly of a typical star-forming galaxy at redshift z~3, D.P. Stark... - 0 views

adsabs.harvard.edu/...2008Natur.455..775S

advanced strong clusters paper

shared by Tommaso Treu on 30 May 12 - No Cached

Tommaso Treu on 30 May 12

A very nice recent illustration of the power of gravitational lensing to magnify the distant universe. (A)

<div class="cArrow"> </div><div class="cContentInner">A very nice recent illustration of the power of gravitational lensing to magnify the distant universe. (A)</div>

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Group items tagged

The Survival of Dark Matter Halos in the Cluster Cl 0024+16, P. Natarajan, J.-P. Kneib,... - 0 views

Subaru Weak Lensing Measurements of Four Strong Lensing Clusters: Are Lensing Clusters ... - 0 views

LoCuSS: comparison of observed X-ray and lensing galaxy cluster scaling relations with ... - 0 views

A comparison of weak-lensing masses and X-ray properties of galaxy clusters, H. Hoekstr... - 0 views

Strong and Weak Lensing United. III. Measuring the Mass Distribution of the Merging Gal... - 0 views

A blue ring-like structure, in the center of the A 370 cluster of galaxies, G. Soucail,... - 0 views

A Direct Empirical Proof of the Existence of Dark Matter, D. Clowe, et al., Astrophys. ... - 0 views

The Mass-Lx Relation for Moderate Luminosity X-ray Clusters, H. Hoekstra, M. Donahue, C... - 0 views

First Results on Shear-selected Clusters from the Deep Lens Survey: Optical Imaging, Sp... - 0 views

Cluster Lenses: J.-P. Kneib, P. Natarajan, Astron Astrophys Rev, 19, 47-146 (2011) - 0 views

The Dark Matter Distribution in A383: Evidence for a Shallow Density Cusp from Improved... - 0 views

A Bayesian approach to strong lensing modelling of galaxy clusters, E. Jullo, J.-P. Kne... - 0 views

LensTool, J.-P. Kneib and E. Jullo - 0 views

A New Survey for Giant Arcs, J. F. Hennawi, et al., Astronom J. 135, 664-681 (2008) - 0 views

Effects of asphericity and substructure on the determination of cluster mass with weak ... - 0 views

Mapping Dark Matter with Gravitational Lenses: J. A. Tyson, Physics Today, Jun. 1992, ... - 0 views

Nebulae as gravitational lenses: F. Zwicky, Phys. Rev. 51, 290-290 (1937) - 0 views

Worlds Collide: The New York Times, 23 August 2006. - 0 views

Reconstruction of Cluster Masses Using Particle based Lensing. I. Application to Weak L... - 0 views

The formation and assembly of a typical star-forming galaxy at redshift z~3, D.P. Stark... - 0 views

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