Precise clustering and density evolution of redMaPPer galaxy clusters versus MXXL simulation

Jimeno, Pablo; Broadhurst, Tom; Lazkoz, Ruth; Angulo, Raúl E.; Diego, J. M.; Umetsu, Keiichi; Chu, M. C.

doi:10.1093/mnras/stw3253

Cited by 18 publications

(35 citation statements)

References 125 publications

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“…In the velocity unit, the amplitude of the signal is from 5 to 2 km/s depending on the samples. This is consistent with previous results [9,10,12]. The result also shows that the amplitude of the signal decreases from left to right in Table III.…”

Section: Satellite Galaxies Virialised In Halossupporting

confidence: 93%

“…This demonstrates that the gravitational redshift is potentially an interesting test of modified gravity [10]. However, the random velocity of central galaxies could be a systematic error [9,10,12]. When the central galaxy has a random velocity dispersion of 30% of the satellite galaxies, the prediction changes, as shown in Table V.…”

Section: Satellite Galaxies Virialised In Halosmentioning

confidence: 99%

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Gravitational redshifts of clusters and voids

2018

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We investigate gravitational redshifts (signals of gravitational potential) in measurements of the redshifts of cosmological objects, i.e., central and satellite galaxies in clusters of galaxies, intracluster gas, as well as galaxies associated with voids by developing simple theoretical models. In the analysis with satellite galaxies in clusters, we develop a very simple analytic model for satellite galaxies virialised in halos, which enables us to evaluate the signals depending on the properties of the halo occupation distribution of galaxies. We obtain results consistent with recent previous results, though our results are restricted to the satellite galaxies inside the virial radius. In the analysis of intracluster gas, we develop a simple analytic model including the effect of random motions of gases, which are assumed to generate nonthermal pressure. We demonstrate a possible contribution of the random motions of gases to gravitational potential measurements. We also investigate a possible signature of the gravitational potential in measurements of galaxies associated with voids by utilizing a simple analytic model. We show that the second-order Hubble term, which appears in the expansion of the scale factor around the centre of a void, may make a significant contribution depending on the way the galaxy samples are analysed. The studies on the possible signals of gravitational potential for intracluster gases and voids are performed for the first time.

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Section: Satellite Galaxies Virialised In Halossupporting

confidence: 93%

Section: Satellite Galaxies Virialised In Halosmentioning

confidence: 99%

Gravitational redshifts of clusters and voids

2018

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“…Using these observable quantities as mass proxies on the one hand and the connection between cluster masses and their bias on the other, we can make inference on the cosmological model. Most attempts to follow this route have resulted in cosmological parameters that disagree with the constraints obtained using the number counts of the same sample (Schuecker et al 2002), however, or lead to strongly disagreeing scaling relations (Jimeno et al 2017). Remarkably, Allevato et al (2012) obtained a precise agreement between the modeling of the clustering based on the weak-lensing mass calibration and the measured clustering amplitudes of galaxy groups by taking the definition of the object and the effects of sample variance into account.…”

Section: Introductionmentioning

confidence: 99%

Clustering of CODEX clusters

Lindholm

Finoguenov

Comparat

et al. 2021

A&A

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Context. The clustering of galaxy clusters links the spatial nonuniformity of dark matter halos to the growth of the primordial spectrum of perturbations. The amplitude of the clustering signal is widely used to estimate the halo mass of astrophysical objects. The advent of cluster mass calibrations enables using clustering in cosmological studies. Aims. We analyze the autocorrelation function of a large contiguous sample of galaxy clusters, the Constrain Dark Energy with X-ray (CODEX) sample, in which we take particular care of cluster definition. These clusters were X-ray selected using the ROentgen SATellite (ROSAT) All-Sky Survey (RASS) and then identified as galaxy clusters using the code redMaPPer run on the photometry of the Sloan Digital Sky Survey (SDSS). We develop methods for precisely accounting for the sample selection effects on the clustering and demonstrate their robustness using numerical simulations. Methods. Using the clean CODEX sample, which was obtained by applying a redshift-dependent richness selection, we computed the two-point autocorrelation function of galaxy clusters in the 0.1 < z < 0.3 and 0.3 < z < 0.5 redshift bins. We compared the bias in the measured correlation function with values obtained in numerical simulations using a similar cluster mass range. Results. By fitting a power law, we measured a correlation length r 0 = 18.7 ± 1.1 and slope γ = 1.98 ± 0.14 for the correlation function in the full redshift range. By fixing the other cosmological parameters to their nine-year Wilkinson Microwave Anisotropy Probe (WMAP) values, we reproduced the observed shape of the correlation function under the following cosmological conditions: Ω m 0 = 0.22 +0.04 −0.03 and S 8 = σ 8 (Ω m 0 /0.3) 0.5 = 0.85 +0.10 −0.08 with estimated additional systematic errors of σ Ωm 0 = 0.02 and σ S 8 = 0.20. We illustrate the complementarity of clustering constraints by combining them with CODEX cosmological constraints based on the X-ray luminosity function, deriving Ω m 0 = 0.25 ± 0.01 and σ 8 = 0.81 +0.01 −0.02 with an estimated additional systematic error of σ Ωm 0 = 0.07 and σ σ 8 = 0.04. The mass calibration and statistical quality of the mass tracers are the dominant source of uncertainty.

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“…These works are extensions of precise modeling of galaxy distributions to include higher order effects of redshift-space distortions and other effects. The gravitational redshift and the second order Doppler effect (from the second order peculiar velocity) in the galaxy clusters are one of such topics [22][23][24][25][26][27]. Measurements of the gravitational redshift with galaxies associated with clusters have been reported [22][23][24].…”

Section: Introductionmentioning

confidence: 99%

“…The gravitational redshift and the second order Doppler effect (from the second order peculiar velocity) in the galaxy clusters are one of such topics [22][23][24][25][26][27]. Measurements of the gravitational redshift with galaxies associated with clusters have been reported [22][23][24]. It is worth mentioning that recent research indicated that the gravitational redshift caused by the local gravitational potential may become a source of bias in the calibration of cosmological parameters using type Ia supernovae data combined with other cosmological probes, provided that we have no prior knowledge about the local gravitational potential [28].…”

Section: Introductionmentioning

confidence: 99%

Gravitational redshift in the void-galaxy cross-correlation function in redshift space

Nan

Yamamoto

2018

Phys. Rev. D

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We construct an analytic model for the void-galaxy cross-correlation function that enables theoretical predictions of the dipole signal produced dominantly by the gravitational redshift within voids for the first time. By extending a theoretical formulation for the redshift-space distortion of galaxies to include the second order terms of the galaxy peculiar velocity v and the gravitational potential, we formulate the void-galaxy cross-correlation function multipoles in the redshift space, the monopole ξ (s) 0 , dipole ξ (s) 1 and quadrupole ξ (s)2 . We find that the dipole ξ (s) 1 is dominated by the gravitational redshift, which provide a unique opportunity to detect the gravitational potential of voids. Thus, for the dipole ξ (s) 1 (s), the gravitational redshift is crucial. Although the higher order effect is almost negligible on the monopole ξ (s) 0 , it has an influence on the quadrupole ξ (s) 2 .The effects from the random velocity of galaxies and the definition of the void center on the dipole signal are also discussed. Our model offers a new theoretical probe for the detection of gravitational redshift with voids and further tests on cosmology and gravity.

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Precise clustering and density evolution of redMaPPer galaxy clusters versus MXXL simulation

Cited by 18 publications

References 125 publications

Gravitational redshifts of clusters and voids

Gravitational redshifts of clusters and voids

Clustering of CODEX clusters

Gravitational redshift in the void-galaxy cross-correlation function in redshift space

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