The Atacama Cosmology Telescope: Sunyaev-Zel'dovich selected galaxy clusters at 148 GHz from three seasons of data

By M. Hasselfield, M. Hilton, T. Marriage, G. Addison, L. Barrientos, Nicholas Battaglia, E. Battistelli, J. Richard Bond, D. Crichton, Sudeep Das and 34 more. 2013

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We present a catalog of 68 galaxy clusters, of which 19 are new discoveries, detected via the Sunyaev-Zel'dovich effect (SZ) at 148 GHz in the Atacama Cosmology Telescope (ACT) survey on the celestial equator. With this addition, the ACT collaboration has reported a total of 91 optically confirmed, SZ detected clusters. The 504 square degree survey region includes 270 square degrees of overlap with SDSS Stripe 82, permitting the confirmation of SZ cluster candidates in deep archival optical data. The subsample of 48 clusters within Stripe 82 is estimated to be 90% complete for M500c > 4.5 × 1014M⊙ and redshifts 0.15 < z < 0.8. While a full suite of matched filters is used to detect the clusters, the sample is studied further through a ''Profile Based Amplitude Analysis'' using a statistic derived from a single filter at a fixed θ500 = 5.′9 angular scale. This new approach incorporates the cluster redshift along with prior information on the cluster pressure profile to fix the relationship between the cluster characteristic size (R500) and the integrated Compton parameter (Y500). We adopt a one-parameter family of ''Universal Pressure Profiles'' (UPP) with associated scaling laws, derived from X-ray measurements of nearby clusters, as a baseline model. Three additional models of cluster physics are used to investigate a range of scaling relations beyond the UPP prescription. Assuming a concordance cosmology, the UPP scalings are found to be nearly identical to an adiabatic model, while a model incorporating non-thermal pressure better matches dynamical mass measurements and masses from the South Pole Telescope. A high signal to noise ratio subsample of 15 ACT clusters with complete optical follow-up is used to obtain cosmological constraints. We demonstrate, using fixed scaling relations, how the constraints depend on the assumed gas model if only SZ measurements are used, and show that constraints from SZ data are limited by uncertainty in the scaling relation parameters rather than sample size or measurement uncertainty. We next add in seven clusters from the ACT Southern survey, including their dynamical mass measurements, which are based on galaxy velocity dispersions and thus are independent of the gas physics. In combination with WMAP7 these data simultaneously constrain the scaling relation and cosmological parameters, yielding 68% confidence ranges described by σ8 = 0.829 ± 0.024 and Ωm = 0.292 ± 0.025.. We consider these results in the context of constraints from CMB and other cluster studies. The constraints arise mainly due to the inclusion of the dynamical mass information and do not require strong priors on the SZ scaling relation parameters. The results include marginalization over a 15% bias in dynamical masses relative to the true halo mass. In an extension to ΛCDM that incorporates non-zero neutrino mass density, we combine our data with WMAP7, Baryon Acoustic Oscillation data, and Hubble constant measurements to constrain the sum of the neutrino mass species to be ∑νmν < 0.29 eV (95% confidence limit).

Subfields: Astronomy and Astrophysics, Instrumentation

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Citations in the corpus

The Canadian Cluster Comparison Project: detailed study of systematics and updated weak lensing masses (2015, methodology): “In fact, the lack of calibrated scaling relations is currently the dominant limitation of blind searches that exploit this effect, such as those carried out using the South Pole Telescope (Reichardt et al. 2013) or the Atacama Cosmology Telescope (Hasselfield et al. 2013).”
redMaPPer. I. ALGORITHM AND SDSS DR8 CATALOG (2013, background): “Over the past several years, galaxy clusters have been recognized as powerful cosmological probes (e.g., Henry et al. 2009; Vikhlinin et al. 2009; Mantz et al. 2010; Rozo et al. 2010; Clerc et al. 2012; Benson et al. 2013; Hasselfield et al. 2013).”
COSMOLOGICAL CONSTRAINTS FROM GALAXY CLUSTERS IN THE 2500 SQUARE-DEGREE SPT-SZ SURVEY (2016, methodology): “…cluster samples selected at X-ray (e.g., Vikhlinin et al. 2009b; Mantz et al. 2010, 2015), optical (e.g., Rozo et al. 2010), and millimeter (e.g., Reichardt et al. 2013; Planck Collaboration et al. 2014b; Hasselfield et al. 2013; Bocquet et al. 2015; Planck Collaboration et al. 2015) wavelengths.”
The NIKA2 large-field-of-view millimetre continuum camera for the 30 m IRAM telescope (2017, background): “…side, existing CMB experiments have proven to be very efficient in detecting clusters of galaxies via the Sunyaev-Zel’dovich (SZ) effect (Planck I, 2016, Hasselfield et al, 2013, Reichardt, et al, 2013) and have provided best cluster cosmological results to date (Planck II, 2016, Planck III, 2016).”
Early dark energy does not restore cosmological concordance (2020, methodology): “Furthermore, we have not utilized all possible data sets that constrain LSS in this paper; in particular, galaxy cluster number counts (e.g., Hasselfield et al. (2013); Mantz et al. (2015); Planck Collaboration et al. (2016b); Bocquet et al. (2019)) and thermal Sunyaev-Zel’dovich power spectrum…”
Planck 2013 results. XX. Cosmology from Sunyaev-Zeldovich cluster counts (2013, methodology): “…is complementary to those from observations using the South Pole Telescope (SPT, Carlstrom et al. 2011) and the Atacama Cosmology Telescope (ACT, Swetz et al. 2011), whose teams recently published the first large samples of SZ-selected clusters (Reichardt et al. 2013; Hasselfield et al. 2013).”
THE SLOAN DIGITAL SKY SURVEY COADD: 275 deg2 OF DEEP SLOAN DIGITAL SKY SURVEY IMAGING ON STRIPE 82 (2011, background): “…sky that has been heavily studied, there are also many opportunities for multi-wavelength studies, from the x-ray (XMM: Mehrtens et al. 2012) to the microwave (SZ: Menanteau et al. 2010; Hand et al. 2011; Reese et al. 2012; Sehgal et al. 2011; Hasselfield et al. 2013) to radio (Hodge et al. 2013).”
THE REDMAPPER GALAXY CLUSTER CATALOG FROM DES SCIENCE VERIFICATION DATA (2016, background): “…and are uniquely powerful cosmological probes (e.g., Henry et al. 2009; Vikhlinin et al. 2009; Mantz et al. 2010; Rozo et al. 2010; Clerc et al. 2012; Benson et al. 2013; Hasselfield et al. 2013; Planck Collaboration et al. 2014) (see also reviews in Allen et al. (2011); Weinberg et al. (2013)).”
The Atacama Cosmology Telescope: A Catalog of >4000 Sunyaev–Zel’dovich Galaxy Clusters (2020, methodology): “As in previous ACT cluster searches (Hasselfield et al. 2013; Hilton et al. 2018), throughout this work we model the cluster signal using the universal pressure profile (UPP; Arnaud et al. 2010, A10 hereafter), which is convolved with the appropriate ACT beam for each frequency to form the signal…”
KiDS-450: cosmological parameter constraints from tomographic weak gravitational lensing (2016, background): “…that detect large numbers of galaxy clusters with relatively well-defined selection functions through the thermal Sunyaev–Zel’dovich effect (e.g. Hasselfield et al. 2013; Bleem et al. 2015; Planck Collaboration et al. 2016c), and improvements in the calibration of cluster masses (Applegate et…”
Baryon impact on the halo mass function: Fitting formulae and implications for cluster cosmology (2015, background): “Catalogues from different cluster surveys have proven to be useful cosmological probes (e.g. Vikhlinin et al. 2009; Mantz et al. 2010; Rozo et al. 2010; Benson et al. 2013; Hasselfield et al. 2013; Planck Collaboration et al. 2015b; Bocquet et al. 2015; Mantz et al. 2015).”
Planck2015 results (2015, neutral): “…et al. 2011; Rest et al. 2014), and estimates of the amplitude of the fluctuation spectrum from weak gravitational lensing (Heymans et al. 2013; Mandelbaum et al. 2013) and the abundance of rich clusters of galaxies (Planck Collaboration XX 2014; Benson et al. 2013; Hasselfield et al. 2013b).”