Kinetic Sunyaev-Zel’dovich effect in modified gravity

Bianchini, F.; Silvestri, Alessandra

doi:10.1103/physrevd.93.064026

Cited by 28 publications

(30 citation statements)

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“…following the Hu & Sawicki (2007) formalism with n = 1. A comparison of our works is therefore very interesting, in particular to test the possibile differences associated to their analytical approach, using power spectra obtained with MG-CAMB (Zhao et al 2009) and MG-HALOFIT (Zhao 2014), with respect to our numerical method with MG-GADGET. In agreement with our results, Bianchini & Silvestri (2016) observe an increase of the kSZ that does not depend on the angular scale. This confirms that the scale dependence induced in the density and velocity power spectrum by modified gravity is washed away with the projection along the line-of-sight.…”

Section: Comparison With the Literaturesupporting

confidence: 93%

“…The effect of modified gravity on the kSZ power spectrum is a pioneer topic, that has not been much explored in the literature. The only work so far is by Bianchini & Silvestri (2016), who provide a set of analytical estimates of the post-ionization kSZ power spectrum shape with a family of modified gravity models similar to the ones adopted here, i.e. following the Hu & Sawicki (2007) formalism with n = 1.…”

Section: Comparison With the Literaturementioning

confidence: 99%

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The kinematic Sunyaev–Zel’dovich effect of the large-scale structure (II): the effect of modified gravity

Roncarelli

Baldi

Villaescusa-Navarro

2018

Monthly Notices of the Royal Astronomical Society

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The key to understand the nature of dark energy relies in our ability to probe the distant Universe. In this framework, the recent detection of the kinematic Sunyaev-Zel'dovich (kSZ) effect signature in the cosmic microwave background obtained with the South Pole Telescope (SPT) is extremely useful since this observable is sensitive to the high-redshift diffuse plasma. We analyse a set of cosmological hydrodynamical simulation with 4 different realisations of a Hu & Sawicki f (R) gravity model, parametrised by the values of f R,0 = (0, −10 −6 , −10 −5 , −10 −4 ), to compute the properties of the kSZ effect due to the ionized Universe and how they depend on f R,0 and on the redshift of reionization, z re . In the standard General Relativity limit ( f R,0 =0) we obtain an amplitude of the kSZ power spectrum of D kSZ 3000 = 4.1 µK 2 (z re =8.8), close to the +1σ limit of the D kSZ 3000 = (2.9 ± 1.3) µK 2 measurement by SPT. This corresponds to an upper limit on the kSZ contribute from patchy reionization of D kSZ,patchy 3000 < 0.9 µK 2 (95 per cent confidence level). Modified gravity boosts the kSZ signal by about 3, 12 and 50 per cent for f R,0 = (−10 −6 , −10 −5 , −10 −4 ), respectively, with almost no dependence on the angular scale. This means that with modified gravity the limits on patchy reionization shrink significantly: for f R,0 = −10 −5 we obtain D kSZ,patchy 3000 < 0.4 µK 2 . Finally, we provide an analytical formula for the scaling of the kSZ power spectrum with z re and f R,0 at different multipoles: at ℓ = 3000 we obtain D kSZ 3000 ∝ z re 0.24 1 + f R,0 41.

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Section: Comparison With the Literaturesupporting

confidence: 93%

Section: Comparison With the Literaturementioning

confidence: 99%

The kinematic Sunyaev–Zel’dovich effect of the large-scale structure (II): the effect of modified gravity

Roncarelli

Baldi

Villaescusa-Navarro

2018

Monthly Notices of the Royal Astronomical Society

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“…Conversely, peculiar velocities estimated from the kSZ effect, together with external constraints on cluster astrophysics, provide independent measurements of the amplitude and growth rate of density perturbations. The latter in turn can be used to test models of dark energy, modified gravity (Keisler & Schmidt 2013;Ma & Zhao 2014;Mueller et al 2015b;Bianchini & Silvestri 2016) and massive neutrinos (Mueller et al 2015a).…”

Section: Introductionmentioning

confidence: 99%

Detection of the kinematic Sunyaev–Zel'dovich effect with DES Year 1 and SPT

Soergel¹,

Flender²,

Story³

et al. 2016

Mon. Not. R. Astron. Soc.

117

119

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We detect the kinematic Sunyaev-Zel'dovich (kSZ) effect with a statistical significance of 4.2σ by combining a cluster catalogue derived from the first year data of the Dark Energy Survey (DES) with CMB temperature maps from the South Pole Telescope Sunyaev-Zel'dovich (SPT-SZ) Survey. This measurement is performed with a differential statistic that isolates the pairwise kSZ signal, providing the first detection of the large-scale, pairwise motion of clusters using redshifts derived from photometric data. By fitting the pairwise kSZ signal to a theoretical template we measure the average central optical depth of the cluster sample, τ e = (3.75 ± 0.89) · 10 −3 . We compare the extracted signal to realistic simulations and find good agreement with respect to the signal-to-noise, the constraint onτ e , and the corresponding gas fraction. High-precision measurements of the pairwise kSZ signal with future data will be able to place constraints on the baryonic physics of galaxy clusters, and could be used to probe gravity on scales 100 Mpc.

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“…From a cosmological point of view, peculiar velocities of galaxy clusters are found through measurements of the kSZ effect and they allow the amplitude of the growth rate of density fluctuations to be estimated. In coming years, it is expected that kSZ measurements by the advanced Atacama Cosmology Telescope (AdvACT; Henderson et al 2016) and the third-generation South Pole Telescope (SPT-3G; Benson et al 2014) will constrain the growth rate of structures to sub-percentage precision at z < 1 (Alonso et al 2016), which then help to constrain models of dark energy (Bhattacharya & Kosowsky 2008;Ma & Zhao 2014), modified gravity (Mueller et al 2015a;Bianchini & Silvestri 2016), and massive neutrinos (Mueller et al 2015b). From an astrophysical point of view, there is debate over whether a significant fraction of diffuse gas is present around halos as a circumgalactic medium, or whether the gas, once expelled because of feedback processes such as star formation, supernovae, and active galactic nuclei (AGNs), is never accreted onto the halos (e.g., Planck Collaboration XI 2013; Anderson et al 2015;Le Brun et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Direct detection of the kinetic Sunyaev-Zel’dovich effect in galaxy clusters

Tanimura

Zaroubi

Aghanim

2021

A&A

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We report the direct detection of the kinetic Sunyaev-Zel’dovich (kSZ) effect in galaxy clusters with a 3.5σ significance level. The measurement was performed by stacking the Planck map at 217 GHz at the positions of galaxy clusters from the Wen-Han-Liu (WHL) catalog. To avoid the cancelation of positive and negative kSZ signals, we used the large-scale distribution of the Sloan Digital Sky Survey (SDSS) galaxies to estimate the peculiar velocities of the galaxy clusters along the line of sight and incorporated the sign in the velocity-weighted stacking of the kSZ signals. Using this technique, we were able to measure the kSZ signal around galaxy clusters beyond 3 × R500. Assuming a standard β-model, we also found that the gas fraction within R500 is fgas, 500 = 0.12 ± 0.04 for the clusters with the mass of M500 ∼ 1.0 × 1014 h−1 M⊙. We compared this result to predictions from the Magneticum cosmological hydrodynamic simulations as well as other kSZ and X-ray measurements, most of which show a lower gas fraction than the universal baryon fraction for the same mass of clusters. Our value is statistically consistent with results from the measurements and simulations and also with the universal value within our measurement uncertainty.

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Kinetic Sunyaev-Zel’dovich effect in modified gravity

Cited by 28 publications

References 86 publications

The kinematic Sunyaev–Zel’dovich effect of the large-scale structure (II): the effect of modified gravity

The kinematic Sunyaev–Zel’dovich effect of the large-scale structure (II): the effect of modified gravity

Detection of the kinematic Sunyaev–Zel'dovich effect with DES Year 1 and SPT

Direct detection of the kinetic Sunyaev-Zel’dovich effect in galaxy clusters

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