Observations of High‐Redshift X‐Ray Selected Clusters with the Sunyaev‐Zel’dovich Array

Muchovej, Stephen; Mroczkowski, Tony; Carlstrom, J. E.; Cartwright, J. K.; Greer, Christopher H.; Hennessy, Ryan; Loh, Michael; Pryke, C.; Reddall, B.; Runyan, M. C.; Sharp, Matthew; Hawkins, David; Lamb, James W.; Woody, D. P.; Joy, M.; Leitch, E. M.; Miller, Amber

doi:10.1086/511971

Cited by 94 publications

(121 citation statements)

References 35 publications

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“…The SPT team found good agreement between the X-ray predicted signal and their SZ measurement within R 500 . Similarly, in a recent study, Bonamente et al (2012) used a sample of 25 clusters observed with SZA/CARMA (Muchovej et al 2007) and found an excellent agreement when modelling the SZ emission over their sample, either with the universal pressure profile from A10 or with the model from Bulbul et al (2010). Our SZ and X-ray data are in excellent agreement over the radial range (0.1-1) R 500 , providing tighter observational constraints.…”

Section: The Inner Profilesupporting

confidence: 67%

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Planckintermediate results

Ade

Aghanim

Arnaud

et al. 2013

A&A

291

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Taking advantage of the all-sky coverage and broad frequency range of the Planck satellite, we study the Sunyaev-Zeldovich (SZ) and pressure profiles of 62 nearby massive clusters detected at high significance in the 14-month nominal survey. Careful reconstruction of the SZ signal indicates that most clusters are individually detected at least out to R 500 . By stacking the radial profiles, we have statistically detected the radial SZ signal out to 3 × R 500 , i.e., at a density contrast of about 50-100, though the dispersion about the mean profile dominates the statistical errors across the whole radial range. Our measurement is fully consistent with previous Planck results on integrated SZ fluxes, further strengthening the agreement between SZ and X-ray measurements inside R 500 . Correcting for the effects of the Planck beam, we have calculated the corresponding pressure profiles. This new constraint from SZ measurements is consistent with the X-ray constraints from XMM-Newton in the region in which the profiles overlap (i.e., [0.1-1] R 500 ), and is in fairly good agreement with theoretical predictions within the expected dispersion. At larger radii the average pressure profile is slightly flatter than most predictions from numerical simulations. Combining the SZ and X-ray observed profiles into a joint fit to a generalised pressure profile gives best-fit parameters [P 0 , c 500 , γ, α, β] = [6.41, 1.81, 0.31, 1.33, 4.13]. Using a reasonable hypothesis for the gas temperature in the cluster outskirts we reconstruct from our stacked pressure profile the gas mass fraction profile out to 3 R 500 . Within the temperature driven uncertainties, our Planck constraints are compatible with the cosmic baryon fraction and expected gas fraction in halos. Key words. cosmology: observations -galaxies: clusters: general -galaxies: clusters: intracluster medium -submillimeter: general -X-rays: general Appendices are available in electronic form at

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Section: The Inner Profilesupporting

confidence: 67%

“…In parallel, SZ observations with instruments such as the SunyaevZeldovich Array (SZA, Muchovej et al 2007), the South Pole Telescope (SPT, Carlstrom et al 2011), the Atacama Cosmology Telescope (ACT, Swetz et al 2011), and Planck (Tauber et al 2010) 1 have recently started to deliver on the promise of SZ observations for cluster studies.…”

Section: Introductionmentioning

confidence: 99%

Planckintermediate results

Ade

Aghanim

Arnaud

et al. 2013

A&A

291

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“…The SZA data were used to search for radio sources around CL J1226.9+3332 (Muchovej et al 2007). From their observations, no such objects are present within the NIKA field.…”

Section: Point Source Contaminationmentioning

confidence: 99%

Pressure distribution of the high-redshift cluster of galaxies CL J1226.9+3332 with NIKA

Adam

Comis

Macías-Pérez

et al. 2015

A&A

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The thermal Sunyaev-Zel'dovich (tSZ) effect is expected to provide a low scatter mass proxy for galaxy clusters since it is directly proportional to the cluster thermal energy. The tSZ observations have proven to be a powerful tool for detecting and studying them, but high angular resolution observations are now needed to push their investigation to a higher redshift. In this paper, we report high angular (<20 arcsec) resolution tSZ observations of the high-redshift cluster CL J1226.9+3332 (z = 0.89). It was imaged at 150 and 260 GHz using the NIKA camera at the IRAM 30-m telescope. The 150 GHz map shows that CL J1226.9+3332 is morphologically relaxed on large scales with evidence of a disturbed core, while the 260 GHz channel is used mostly to identify point source contamination. NIKA data are combined with those of Planck and X-ray from Chandra to infer the cluster's radial pressure, density, temperature, and entropy distributions. The total mass profile of the cluster is derived, and we find M 500 = 5.96 +1.02 −0.79 × 10 14 M within the radius R 500 = 930 +50 −43 kpc, at a 68% confidence level. (R 500 is the radius within which the average density is 500 times the critical density at the cluster's redshift.) NIKA is the prototype camera of NIKA2, a KIDs (kinetic inductance detectors) based instrument to be installed at the end of 2015. This work is, therefore, part of a pilot study aiming at optimizing tSZ NIKA2 large programs.

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“…As the SZ effect is a measure of the integrated line-of-sight electron density, weighted by temperature, i.e., the integrated pressure (see Section 2.1), it probes different properties than the X-ray emission, which is proportional to the square of the electron density. Cluster surveys exploiting the redshift independence of the SZ effect are now being conducted by a variety of instruments, including the SunyaevZel'dovich Array (SZA; Muchovej et al 2007), the South Pole Telescope (Ruhl et al 2004), the Atacama Cosmology Telescope (Kosowsky 2003) and the Atacama Pathfinder Experiment (APEX) SZ instrument (Dobbs et al 2006).…”

Section: Introductionmentioning

confidence: 99%

Application of a Self-Similar Pressure Profile to Sunyaev-Zel'dovich Effect Data From Galaxy Clusters

Mroczkowski

Bonamente

Carlstrom

et al. 2009

ApJ

Self Cite

132

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We investigate the utility of a new, self-similar pressure profile for fitting Sunyaev-Zel'dovich (SZ) effect observations of galaxy clusters. Current SZ imaging instruments-such as the Sunyaev-Zel'dovich Array (SZA)-are capable of probing clusters over a large range in a physical scale. A model is therefore required that can accurately describe a cluster's pressure profile over a broad range of radii from the core of the cluster out to a significant fraction of the virial radius. In the analysis presented here, we fit a radial pressure profile derived from simulations and detailed X-ray analysis of relaxed clusters to SZA observations of three clusters with exceptionally high-quality X-ray data: A1835, A1914, and CL J1226.9+3332. From the joint analysis of the SZ and X-ray data, we derive physical properties such as gas mass, total mass, gas fraction and the intrinsic, integrated Compton y-parameter. We find that parameters derived from the joint fit to the SZ and X-ray data agree well with a detailed, independent X-ray-only analysis of the same clusters. In particular, we find that, when combined with X-ray imaging data, this new pressure profile yields an independent electron radial temperature profile that is in good agreement with spectroscopic X-ray measurements.

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Observations of High‐Redshift X‐Ray Selected Clusters with the Sunyaev‐Zel’dovich Array

Cited by 94 publications

References 35 publications

Planckintermediate results

Planckintermediate results

Pressure distribution of the high-redshift cluster of galaxies CL J1226.9+3332 with NIKA

Application of a Self-Similar Pressure Profile to Sunyaev-Zel'dovich Effect Data From Galaxy Clusters

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