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We use multi-frequency information in first year WMAP data to search for the Sunyaev-Zeldovich (SZ) effect. WMAP has sufficiently broad frequency coverage to constrain SZ without the addition of higher frequency data: the SZ power spectrum…

天体物理学 · 物理学 2009-11-10 Kevin M. Huffenberger , Uros Seljak , Alexey Makarov

Interferometric observations of the Sunyaev-Zel'dovich Effect (SZE) toward clusters of galaxies provide sensitive cosmological probes. We present results from 1 cm observations (at BIMA and OVRO) of a large, intermediate redshift cluster…

天体物理学 · 物理学 2009-10-31 J. J. Mohr , J. E. Carlstrom , G. P. Holder , W. L. Holzapfel , M. K. Joy , E. M. Leitch , E. D. Reese

One of the key elements needed to perform the cosmological exploitation of a cluster survey is the relation between the survey observable and the cluster masses. Among these observables, the integrated Compton parameter $Y$ is a measurable…

In cluster cosmology, cluster masses are the main parameter of interest. They are needed to constrain cosmological parameters through the cluster number count. As the mass is not an observable, a scaling relation is needed to link cluster…

The PLANCK mission is the most sensitive all-sky CMB experiment currently planned. The High Frequency Instrument (HFI) will be especially suited for observing clusters of galaxies by their thermal Sunyaev-Zel'dovich (SZ) effect. In order to…

天体物理学 · 物理学 2013-03-07 Bjoern Malte Schaefer , Christoph Pfrommer , Reinhard Hell , Matthias Bartelmann

The thermal Sunyaev$-$Zel'dovich (SZ) effect offers a unique probe of the hot and diffuse universe that could help close the missing baryon problem. Traditional extractions of the SZ effect, however, exhibit systematic noise that may lead…

天体物理仪器与方法 · 物理学 2025-09-09 Cameron T. Pratt , Zhijie Qu , Joel N. Bregman

Since its original formulation the Sunyaev-Zeldovich (SZ) effect has been recognized as a ``powerful laboratory'' for our comprehension of physical processes in cosmic structures and to derive crucial information on some general properties…

天体物理学 · 物理学 2009-06-23 Carlo Burigana

The pairwise Kinematic Sunyaev-Zel'dovich (kSZ) measures both the pairwise motion between massive groups and the amount of gas within them, providing a tracer for the cosmic growth. To interpret the cosmological information in kSZ, it is…

宇宙学与河外天体物理 · 物理学 2025-05-22 Y. -H. Hsu , D. Gruen , P. A. Gallardo , K. Dolag , C. -H. To , H. -Y. Wu , I. Marini , E. Rozo

We present and study a new cross-pairwise estimator to extract the kinetic Sunyaev Zeldovich (kSZ) signal from galaxy clusters. The existing pairwise kSZ method involves pairing clusters with other clusters and stacking them. In the…

宇宙学与河外天体物理 · 物理学 2025-05-05 Aritra Kumar Gon , Rishi Khatri

The Sunyaev-Zel'dovich (SZ) effect is a powerful probe of the evolution of structures in the universe, and is thus highly sensitive to cosmological parameters $\sigma_8$ and $\Omega_m$, though its power is hampered by the current…

宇宙学与河外天体物理 · 物理学 2017-08-16 G. Hurier , F. Lacasa

All-sky thermal and kinetic Sunyaev-Zel'dovich (SZ) maps are presented for assessing how well the PLANCK-mission can find and characterise clusters of galaxies, especially in the presence of primary anisotropies of the cosmic microwave…

The Sunyaev-Zeldovich (SZ) effect is a promising tool to study physical properties of the hot X-ray emitting intracluster medium (ICM) in galaxy clusters. To date, most SZ observations have been interpreted in combination with X-ray…

宇宙学与河外天体物理 · 物理学 2015-06-12 Andrea Morandi , Daisuke Nagai , Wei Cui

Weak gravitational lensing and the Sunyaev-Zel'dovich effect provide complementary information on the composition of clusters of galaxies. Preliminary results from cluster SZ observations with the Very Small Array are presented. A Bayesian…

天体物理学 · 物理学 2007-05-23 P. J. Marshall , K. Lancaster , M. P. Hobson , K. J. B. Grainge

We present the first lensing mass measurements of Sunyaev-Zel'dovich (SZ) selected clusters. Using optical imaging from the Southern Cosmology Survey (SCS), we present weak lensing masses for three clusters selected by their SZ emission in…

宇宙学与河外天体物理 · 物理学 2015-05-13 Rachel N. McInnes , Felipe Menanteau , Alan F. Heavens , John P. Hughes , Raul Jimenez , Richard Massey , Patrick Simon , Andy N. Taylor

In galaxy clusters the thermal Sunyaev-Zel'dovich (SZ) effect from the hot intracluster medium (ICM) provides a direct, self-contained measure of the pressure integrated over crossing lines of sight, that is intrinsically independent of…

宇宙学与河外天体物理 · 物理学 2015-06-23 A. Cavaliere , A. Lapi

The cross-correlation of Sunyaev-Zel'dovich effect (SZ) and weak-lensing imaging surveys can be used to test how well hot baryons trace dark matter in clusters of galaxies. We examine this concept using mock SZ and weak-lensing surveys…

天体物理学 · 物理学 2009-09-29 Keiichi Umetsu , Jun-Mein Wu , Tzihong Chiueh , Mark Birkinshaw

We explore the scaling relation between the flux of the Sunyaev-Zel'dovich (SZ) effect and the total mass of galaxy clusters using already reduced Chandra X-ray data present in the ACCEPT (Archive of Chandra Cluster Entropy Profile Tables)…

宇宙学与河外天体物理 · 物理学 2015-05-30 B. Comis , M. De Petris , A. Conte , L. Lamagna , S. De Gregori

The peculiar motions of massive halos probe the distribution of matter in the universe, the gravitational potential, and the history of cosmic structure growth. The kinematic Sunyaev-Zeldovich (kSZ) effect offers a robust observational…

宇宙学与河外天体物理 · 物理学 2025-10-24 Patricio A. Gallardo , Yulin Gong , Boryana Hadzhiyska , Yun-Hsin Hsu

We propose a method of searching for radio sources exhibiting the Sunyaev-Zeldovich effect in the multi-frequency emission maps from the Planck mission data using a convolutional neural network. A catalog for recognizing radio sources is…

宇宙学与河外天体物理 · 物理学 2021-04-22 O. V. Verkhodanov , A. P. Topchieva , A. D. Oronovskaya , S. A. Bazrov , D. A. Shorin