HIFLUGCS: X-ray luminosity-dynamical mass relation and its implications for mass calibrations with the SPIDERS and 4MOST surveys

Zhang, Yuying; Reiprich, T. H.; Schneider, Peter; Clerc, N.; Merloni, A.; Schwope, A. D.; Borm, Katharina; Andernach, H.; Caretta, C. A.; Wu, Xiang-Ping

doi:10.1051/0004-6361/201628971

Cited by 29 publications

(30 citation statements)

References 94 publications

(133 reference statements)

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“…Improvements in spectroscopic follow-up of high-z clusters is, however, very critical. As Zhang et al (2017) showed, a low number of spectroscopic redshifts per cluster and fibre-collisions of SPIDERS tiling can have strong effect on bias and scatter of dynamical mass estimates.…”

Section: R E S U Lt S a N D Discussionmentioning

confidence: 99%

CODEX weak lensing mass catalogue and implications on the mass–richness relation

Kiiveri

Finoguenov

Erben

et al. 2020

Monthly Notices of the Royal Astronomical Society

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The COnstrain Dark Energy with X-ray clusters (CODEX) sample contains the largest flux limited sample of X-ray clusters at 0.35 < z < 0.65. It was selected from ROSAT data in the 10 000 square degrees of overlap with BOSS, mapping a total number of 2770 high-z galaxy clusters. We present here the full results of the CFHT CODEX programme on cluster mass measurement, including a reanalysis of CFHTLS Wide data, with 25 individual lensing-constrained cluster masses. We employ lensfit shape measurement and perform a conservative colour–space selection and weighting of background galaxies. Using the combination of shape noise and an analytic covariance for intrinsic variations of cluster profiles at fixed mass due to large-scale structure, miscentring, and variations in concentration and ellipticity, we determine the likelihood of the observed shear signal as a function of true mass for each cluster. We combine 25 individual cluster mass likelihoods in a Bayesian hierarchical scheme with the inclusion of optical and X-ray selection functions to derive constraints on the slope α, normalization β, and scatter σln λ|μ of our richness–mass scaling relation model in log-space: ${\langle {\rm In}\,\, \lambda\!\!\mid\!\!\mu\rangle = \alpha\mu + \beta,} $ with μ = ln (M200c/Mpiv), and Mpiv = 1014.81M⊙. We find a slope $\alpha = 0.49^{+0.20}_{-0.15}$, normalization $\exp (\beta) = 84.0^{+9.2}_{-14.8}$, and $\sigma _{\ln \lambda | \mu } = 0.17^{+0.13}_{-0.09}$ using CFHT richness estimates. In comparison to other weak lensing richness–mass relations, we find the normalization of the richness statistically agreeing with the normalization of other scaling relations from a broad redshift range (0.0 < z < 0.65) and with different cluster selection (X-ray, Sunyaev–Zeldovich, and optical).

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Section: R E S U Lt S a N D Discussionmentioning

confidence: 99%

CODEX weak lensing mass catalogue and implications on the mass–richness relation

Kiiveri

Finoguenov

Erben

et al. 2020

Monthly Notices of the Royal Astronomical Society

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“…In the top panel we plot the source orientation against 500 where we see that for any given orientation, there is a higher matched model fraction at masses below ∼ 10 13.5 , i.e sources tend to be depolarized in higher mass environments as the resulting | | would be too high to detect in our observed range (and in reality they would cause higher dispersion resulting in depolarization at 150 MHz). As a comparison with sources for which spatially-resolved images have been obtained (at high frequencies), the clusters surrounding Cygnus A and Hydra A are at 500 = 2.8 × 10 14 • (Wilson et al 2002) and 500 = 1.7 × 10 14 • (Zhang et al 2017) respectively, while a less rich group such as that surrounding 3C31 has a mass of 6.3×10 13 • (Komossa & Böhringer 1999). This implies that LOFAR is preferentially sensitive to polarized sources in less rich clusters and poor group environments, and is consistent with our earlier remarks that with LOFAR we are sensitive to polarized radio galaxies with low dispersion in Faraday depth.…”

Section: Model Propertiesmentioning

confidence: 99%

A low-frequency study of linear polarization in radio galaxies

Mahatma

Hardcastle

Harwood

et al. 2020

Monthly Notices of the Royal Astronomical Society

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Radio galaxies are linearly polarized – an important property that allows us to infer the properties of the magnetic field of the source and its environment. However, at low frequencies, Faraday rotation substantially depolarizes the emission, meaning that comparatively few polarized radio galaxies are known at low frequencies. Using the LOFAR Two-metre Sky Survey at 150 MHz and at a resolution of 20 arcsec, we select 342 radio galaxies brighter than 50 mJy and larger than 100 arcsec in angular size, of which 67 are polarized (18 per cent detection fraction). These are predominantly Fanaroff–Riley type II sources. The detection fraction increases with total flux density, and exceeds 50 per cent for sources brighter than 1 Jy. We compare the sources in our sample detected by the LOw Frequency ARray (LOFAR) to those also detected in NRAO VLA Sky Survey at 1400 MHz, and find that our selection bias towards bright radio galaxies drives a tendency for sources depolarized between 1400 and 150 MHz to have flatter spectra over that frequency range than those that remain polarized at 150 MHz. By comparing observed rotation measures with an analytic model, we find that we are preferentially sensitive to sources in low-mass environments. We also infer that sources with one polarized hotspot are inclined by a small angle to the line of sight, while sources with hotspots in both lobes lie in the plane of the sky. We conclude that low-frequency polarization in radio galaxies is related to a combination of environment, flux density, and jet orientation.

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“…Saro et al (2013) use simulations to calibrate the dynamic mass. We use the mass estimates by Zhang et al (2017) based on the velocity dispersion of the HIFLUGCS sample from Zhang et al (2011a) with some updates. The direct comparison to the (default) hydrostatic masses in Fig.…”

Section: Independent Mass Estimatesmentioning

confidence: 99%

HICOSMO – cosmology with a complete sample of galaxy clusters – I. Data analysis, sample selection and luminosity–mass scaling relation

Schellenberger

Reiprich

2017

Monthly Notices of the Royal Astronomical Society

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The X-ray regime, where the most massive visible component of galaxy clusters, the intra cluster medium (ICM), is visible, offers directly measured quantities, like the luminosity, and derived quantities, like the total mass, to characterize these objects. The aim of this project is to analyze a complete sample of galaxy clusters in detail and constrain cosmological parameters, like the matter density, Ω m , or the amplitude of initial density fluctuations, σ 8 . The purely X-ray flux-limited sample (HIFLUGCS ) consists of the 64 X-ray brightest galaxy clusters, which are excellent targets to study the systematic effects, that can bias results. We analyzed in total 196 Chandra observations of the 64 HIFLUGCS clusters, with a total exposure time of 7.7 Ms. Here we present our data analysis procedure (including an automated substructure detection and an energy band optimization for surface brightness profile analysis) which gives individually determined, robust total mass estimates. These masses are tested against dynamical and Planck Sunyaev-Zeldovich (SZ) derived masses of the same clusters, where good overall agreement is found with the dynamical masses. The Planck SZ masses seem to show a mass dependent bias to our hydrostatic masses; possible biases in this mass-mass comparison are discussed including the Planck selection function. Furthermore, we show the results for the (0.1 − 2.4) keV-luminosity vs. mass scalingrelation. The overall slope of the sample (1.34) is in agreement with expectations and values from literature. Splitting the sample into galaxy groups and clusters reveals, even after a selection bias correction, that galaxy groups exhibit a significantly steeper slope (1.88) compared to clusters (1.06).

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HIFLUGCS: X-ray luminosity-dynamical mass relation and its implications for mass calibrations with the SPIDERS and 4MOST surveys

Cited by 29 publications

References 94 publications

CODEX weak lensing mass catalogue and implications on the mass–richness relation

CODEX weak lensing mass catalogue and implications on the mass–richness relation

A low-frequency study of linear polarization in radio galaxies

HICOSMO – cosmology with a complete sample of galaxy clusters – I. Data analysis, sample selection and luminosity–mass scaling relation

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