X-RAY PROPERTIES OF THE FIRST SUNYAEV–ZEL'DOVICH EFFECT SELECTED GALAXY CLUSTER SAMPLE FROM THE SOUTH POLE TELESCOPE

By K. Andersson, B. Benson, P. Ade, K. Aird, B. Armstrong, M. Bautz, L. Bleem, M. Brodwin, J. Carlstrom, C. Chang and 53 more. 2010

147 citations recorded by the source corpus.

We present results of X-ray observations of a sample of 15 clusters selected via their imprint on the cosmic microwave background from the thermal Sunyaev–Zel'dovich (SZ) effect. These clusters are a subset of the first SZ-selected cluster catalog, obtained from observations of 178 deg2 of sky surveyed by the South Pole Telescope (SPT). Using X-ray observations with Chandra and XMM-Newton, we estimate the temperature, TX, and mass, Mg, of the intracluster medium within r500 for each cluster. From these, we calculate YX = MgTX and estimate the total cluster mass using an M500–YX scaling relation measured from previous X-ray studies. The integrated Comptonization, YSZ, is derived from the SZ measurements, using additional information from the X-ray-measured gas density profiles and a universal temperature profile. We calculate scaling relations between the X-ray and SZ observables and find results generally consistent with other measurements and the expectations from simple self-similar behavior. Specifically, we fit a YSZ–YX relation and find a normalization of 0.82 ± 0.07, marginally consistent with the predicted ratio of YSZ/YX = 0.91 ± 0.01 that would be expected from the density and temperature models used in this work. Using the YX-derived mass estimates, we fit a YSZ–M500 relation and find a slope consistent with the self-similar expectation of YSZ∝M5/3 with a normalization consistent with predictions from other X-ray studies. We find that the SZ mass estimates, derived from cosmological simulations of the SPT survey, are lower by a factor of 0.78 ± 0.06 relative to the X-ray mass estimates. This offset is at a level of 1.3σ when considering the ∼15% systematic uncertainty for the simulation-based SZ masses. Overall, the X-ray measurements confirm that the scaling relations of the SZ-selected clusters are consistent with the properties of other X-ray-selected samples of massive clusters, even allowing for the broad redshift range (0.29 < z < 1.08) of the sample.

Subfields: Astronomy and Astrophysics

View Paper: https://www.semanticscholar.org/paper/4f017e7a9c789c9ccaeffeb26e424c2538bef3d4

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Astronomy and Astrophysics

Citations in the corpus

Cosmology and astrophysics from relaxed galaxy clusters - II. Cosmological constraints (2014, methodology): “This test utilized all regions of the detectors at distances > r200 from the cluster center (as estimated from the literature, e.g. A08; Mantz et al. 2010a; Andersson et al. 2011), provided that at least half of the relevant CCD was included.”
Planck intermediate results: V. Pressure profiles of galaxy clusters from the Sunyaev-Zeldovich effect (2012, unknown): “Other dedicated investigations of smaller samples (e.g., Andersson et al. 2011; Sifon et al. 2012) have reached conclusions similar to Planck early results regarding the agreement be-tween the X-ray and SZ view of the ICM.”
JOINT ANALYSIS OF CLUSTER OBSERVATIONS. II. CHANDRA/XMM-NEWTON X-RAY AND WEAK LENSING SCALING RELATIONS FOR A SAMPLE OF 50 RICH CLUSTERS OF GALAXIES (2012, methodology): “…first discussed by Evrard (1990) and continues to be important in grid-based simulations (e.g., Lau et al. 2009; Nelson et al. 2012), SPH simulations (e.g., Rasia et al. 2006; Battaglia et al. 2012; Rasia et al. 2012), and observations of distant clusters (Andersson et al. 2011; Jee et al. 2011).”
Planck2013 results. XXIX. ThePlanckcatalogue of Sunyaev-Zeldovich sources (2013, result): “This confirms at higher precision the strong agreement between the SZ and X-ray measurements (withinR500) of the intra-cluster gas properties found by PEP XI and other studies (Andersson et al. 2011; Sifon et al. 2012; Marrone et al. 2012; Rozo et al. 2012).”
A SUNYAEV–ZEL'DOVICH-SELECTED SAMPLE OF THE MOST MASSIVE GALAXY CLUSTERS IN THE 2500 deg2 SOUTH POLE TELESCOPE SURVEY (2011, methodology): “For two clusters, SPT-CL J2106-5944 and SPT-CL J23375942, we give the flux and luminosity measured by Chandra and reported in Foley et al. (2011) and Andersson et al. (2010), respectively.”
CONSTRAINTS ON COSMOLOGY FROM THE COSMIC MICROWAVE BACKGROUND POWER SPECTRUM OF THE 2500 deg2 SPT-SZ SURVEY (2012, methodology): “X-ray YX measurements of 14 of the clusters are also used in the cosmological constraints; these measurements have been described by Andersson et al. (2011) and Benson et al. (2013).”
COSMOLOGICAL CONSTRAINTS FROM SUNYAEV–ZEL'DOVICH-SELECTED CLUSTERS WITH X-RAY OBSERVATIONS IN THE FIRST 178 deg2 OF THE SOUTH POLE TELESCOPE SURVEY (2011, methodology): “The optical and X-ray properties of this catalog have been described previously in High et al. (2010) and Andersson et al. (2011), hereafter H10 and A11, respectively.”
COSMOLOGICAL CONSTRAINTS FROM GALAXY CLUSTERS IN THE 2500 SQUARE-DEGREE SPT-SZ SURVEY (2016, methodology): “Global cluster properties (e.g., gas mass Mg,500 and X-ray temperature kT500) for each cluster are derived in McDonald et al. (2013b), following closely the procedures described in Andersson et al. (2011).”