LoCuSS: hydrostatic mass measurements of the high-LX cluster sample – cross-calibration of Chandra and XMM–Newton

Martino, R.; Mazzotta, P.; Bourdin, H.; Smith, Graham P.; Bartalucci, I.; Marrone, Daniel P.; Finoguenov, A.; Okabe, Nobuhiko

doi:10.1093/mnras/stu1267

Cited by 72 publications

(135 citation statements)

References 72 publications

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“…The mass measurements comprise weak-lensing masses (Ziparo et al 2016;, direct measurements of hydrostatic masses using X-ray observations (Martino et al 2014), and estimated hydrostatic masses from Planck Collaboration et al . Employing a Bayesian analysis, they modeled the CLASH selection function and astrophysical effects, such as scatter in lensing and SZ masses and their potential correlated scatter, as well as possible bias in the lensing measurements.…”

Section: Discussionmentioning

confidence: 99%

Calibrating the Planck Cluster Mass Scale with Cluster Velocity Dispersions

Amodeo

Mei

Stanford

et al. 2017

ApJ

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We measure the Planck cluster mass bias using dynamical mass measurements based on velocity dispersions of a subsample of 17 Planck-detected clusters. The velocity dispersions were calculated using redshifts determined from spectra that were obtained at the Gemini observatory with the GMOS multi-object spectrograph. We correct our estimates for effects due to finite aperture, Eddington bias, and correlated scatter between velocity dispersion and the Planck mass proxy. The result for the mass bias parameter, , an error of 17% on the mass bias measurement with 17 clusters. This mass bias value is consistent with most previous weak-lensing determinations. It lies within 1s of the value that is needed to reconcile the Planck cluster counts with the Planck primary cosmic microwave background constraints. We emphasize that uncertainty in the velocity bias severely hampers the precision of the measurements of the mass bias using velocity dispersions. On the other hand, when we fix the Planck mass bias using the constraints from PennaLima et al., based on weak-lensing measurements, we obtain a positive velocity bias of b 0.9 v  at 3s.

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Section: Discussionmentioning

confidence: 99%

Calibrating the Planck Cluster Mass Scale with Cluster Velocity Dispersions

Amodeo

Mei

Stanford

et al. 2017

ApJ

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“…These surveys are the Local Cluster Substructure Survey (LoCuSS; Okabe et al 2013;Martino et al 2014;Smith et al in prep. ), the Canadian Cluster Cosmology Project (CCCP; Mahdavi et al 2013;Hoekstra et al 2015), and the Weighing the Giants programme (WtG; von der Linden et al 2014;Applegate et al 2014).…”

Section: Introductionmentioning

confidence: 99%

LoCuSS: weak-lensing mass calibration of galaxy clusters

Okabe

Smith

2016

Mon. Not. R. Astron. Soc.

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155

179

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We present weak-lensing mass measurements of 50 X-ray luminous galaxy clusters at 0.15 z 0.3, based on uniform high quality observations with Suprime-Cam mounted on the 8.2-m Subaru telescope. We pay close attention to possible systematic biases, aiming to control them at the ∼ < 4 per cent level. The dominant source of systematic bias in weak-lensing measurements of the mass of individual galaxy clusters is contamination of background galaxy catalogues by faint cluster and foreground galaxies. We extend our conservative method for selecting background galaxies with (V − i ′ ) colours redder than the red sequence of cluster members to use a colour-cut that depends on cluster-centric radius. This allows us to define background galaxy samples that suffer 1 per cent contamination, and comprise 13 galaxies per square arcminute. Thanks to the purity of our background galaxy catalogue, the largest systematic that we identify in our analysis is a shape measurement bias of 3 per cent, that we measure using simulations that probe weak shears upto g = 0.3. Our individual cluster mass and concentration measurements are in excellent agreement with predictions of the mass-concentration relation. Equally, our stacked shear profile is in excellent agreement with the Navarro Frenk and White profile. Our new LoCuSS mass measurements are consistent with the CCCP and CLASH surveys, and in tension with the Weighing the Giants at ∼ 1 − 2σ significance. Overall, the consensus at z 0.3 that is emerging from these complementary surveys represents important progress for cluster mass calibration, and augurs well for cluster cosmology.

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“…Current discussions of the validity of these equilibrium assumptions can be found e.g. in Martino et al (2014), von der Linden et al (2014, Planck Collaboration Int. III (2013), Planck Collaboration XX (2014.…”

Section: Introductionmentioning

confidence: 99%

The projected gravitational potential of the galaxy cluster MACS J1206 derived from galaxy kinematics

Stock

Meyer

Sarli

et al. 2015

A&A

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We reconstruct the radial profile of the projected gravitational potential of the galaxy cluster MACS J1206 from 592 spectroscopic measurements of velocities of cluster members. To accomplish this, we use a method we have developed recently based on the Richardson-Lucy deprojection algorithm and an inversion of the spherically-symmetric Jeans equation. We find that, within the uncertainties, our reconstruction agrees very well with a potential reconstruction from weak and strong gravitational lensing as well as with a potential obtained from X-ray measurements. In addition, our reconstruction is in good agreement with several common analytic profiles of the lensing potential. Varying the anisotropy parameter in the Jeans equation, we find that isotropy parameters, which are either small, β < ∼ 0.2, or decrease with radius, yield potential profiles that strongly disagree with that obtained from gravitational lensing. We achieve the best agreement between our potential profile and the profile from gravitational lensing if the anisotropy parameter rises steeply to β ≈ 0.6 within ≈0.5 Mpc and stays constant further out.

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LoCuSS: hydrostatic mass measurements of the high-LX cluster sample – cross-calibration of Chandra and XMM–Newton

Cited by 72 publications

References 72 publications

Calibrating the Planck Cluster Mass Scale with Cluster Velocity Dispersions

Calibrating the Planck Cluster Mass Scale with Cluster Velocity Dispersions

LoCuSS: weak-lensing mass calibration of galaxy clusters

The projected gravitational potential of the galaxy cluster MACS J1206 derived from galaxy kinematics

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