COSMOLOGICAL CONSTRAINTS FROM GALAXY CLUSTERS IN THE 2500 SQUARE-DEGREE SPT-SZ SURVEY

By T. Haan, B. Benson, L. Bleem, S. Allen, D. Applegate, M. Ashby, M. Bautz, M. Bayliss, S. Bocquet, M. Brodwin and 67 more. 2016

174 citations recorded by the source corpus.

We present cosmological parameter constraints obtained from galaxy clusters identified by their Sunyaev–Zel’dovich effect signature in the 2500 square-degree South Pole Telescope Sunyaev Zel’dovich (SPT-SZ) survey. We consider the 377 cluster candidates identified at with a detection significance greater than five, corresponding to the 95% purity threshold for the survey. We compute constraints on cosmological models using the measured cluster abundance as a function of mass and redshift. We include additional constraints from multi-wavelength observations, including Chandra X-ray data for 82 clusters and a weak lensing-based prior on the normalization of the mass-observable scaling relations. Assuming a spatially flat ΛCDM cosmology, we combine the cluster data with a prior on H0 and find and , with the parameter combination . These results are in good agreement with constraints from the cosmic microwave background (CMB) from SPT, WMAP, and Planck, as well as with constraints from other cluster data sets. We also consider several extensions to ΛCDM, including models in which the equation of state of dark energy w, the species-summed neutrino mass, and/or the effective number of relativistic species ( ) are free parameters. When combined with constraints from the Planck CMB, H0, baryon acoustic oscillation, and SNe, adding the SPT cluster data improves the w constraint by 14%, to .

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/62ab6cdfd78abaa91bc4e21326b282b895f54a72

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Citations in the corpus

Status of Neutrino Properties and Future Prospects—Cosmological and Astrophysical Constraints (2017, methodology): “For example, the Planck 2013 temperature data, in combination with high-resolution observations from ACT and SPT, were able to constrain Σmν 1.1 eV after marginalizing over the effects of lensing.”
Measurements of the Temperature and E-mode Polarization of the CMB from 500 Square Degrees of SPTpol Data (2017, background): “…by other measurements of large scale structure, including cosmic shear (e.g., Joudaki et al. 2017; Hildebrandt et al. 2017), clusters of galaxies (e.g., de Haan et al. 2016), redshift space distortions (e.g., Gil-Maŕın et al. 2017), and CMB lensing (e.g., Planck Collaboration et al. 2015).”
KiDS-450: cosmological parameter constraints from tomographic weak gravitational lensing (2016, result): “Similarly, de Haan et al. (2016) used 377 cluster candidates from the South Pole Telescope and found σ 8 = 0.772 ± 0.029 (for m = 0.3) in excellent agreement with our results.”
The Simons Observatory: science goals and forecasts (2018, background): “…by uncertainties in the observable-to-mass scaling relation (e.g., Vikhlinin et al. 2009; Vanderlinde et al. 2010; Sehgal et al. 2011; Benson et al. 2013; Hasselfield et al. 2013b; Planck Collaboration 2014c; Mantz et al. 2014; Planck Collaboration 2016j; Mantz et al. 2015; de Haan et al. 2016).”