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The interaction of the cosmic microwave background (CMB) with the hot gas in clusters of galaxies, the so-called Sunyaev--Zel'dovich (SZ) effect, is a very useful tool that allows us to determine the physical conditions in such clusters and…

宇宙学与河外天体物理 · 物理学 2017-05-24 M. Lopez-Corredoira , C. M. Gutierrez , R. T. Genova-Santos

We test the impact of some systematic errors in weak lensing magnification measurements with the COSMOS 30-band photo-$z$ Survey flux limited to $I_{auto}<25.0$ using correlations of both source galaxy counts and magnitudes. Systematic…

宇宙学与河外天体物理 · 物理学 2021-03-03 E. Gaztanaga , S. J. Schmidt , M. D. Schneider , J. A. Tyson

We present measurements of the radial profiles of the mass and galaxy number density around Sunyaev-Zel'dovich-selected clusters using both weak lensing and galaxy counts. The clusters are selected from the Atacama Cosmology Telescope Data…

宇宙学与河外天体物理 · 物理学 2021-09-15 T. Shin , B. Jain , S. Adhikari , E. J. Baxter , C. Chang , S. Pandey , A. Salcedo , D. H. Weinberg , A. Amsellem , N. Battaglia , M. Belyakov , T. Dacunha , S. Goldstein , A. V. Kravtsov , T. N. Varga , T. M. C. Abbott , M. Aguena , A. Alarcon , S. Allam , A. Amon , F. Andrade-Oliveira , J. Annis , D. Bacon , K. Bechtol , M. R. Becker , G. M. Bernstein , E. Bertin , S. Bocquet , J. R. Bond , D. Brooks , E. Buckley-Geer , D. L. Burke , A. Campos , A. Carnero Rosell , M. Carrasco Kind , J. Carretero , R. Chen , A. Choi , M. Costanzi , L. N. da Costa , J. DeRose , S. Desai , J. De Vicente , M. J. Devlin , H. T. Diehl , J. P. Dietrich , S. Dodelson , P. Doel , C. Doux , A. Drlica-Wagner , K. Eckert , J. Elvin-Poole , S. Everett , S. Ferraro , I. Ferrero , A. Ferté , B. Flaugher , J. Frieman , P. A. Gallardo , M. Gatti , E. Gaztanaga , D. W. Gerdes , D. Gruen , R. A. Gruendl , G. Gutierrez , I. Harrison , W. G. Hartley , J. C. Hill , M. Hilton , S. R. Hinton , D. L. Hollowood , J. P. Hughes , D. J. James , M. Jarvis , T. Jeltema , B. J. Koopman , E. Krause , K. Kuehn , N. Kuropatkin , O. Lahav , M. Lima , M. Lokken , N. MacCrann , M. S. Madhavacheril , M. A. G. Maia , J. McCullough , J. McMahon , P. Melchior , F. Menanteau , R. Miquel , J. J. Mohr , K. Moodley , R. Morgan , J. Myles , F. Nati , A. Navarro-Alsina , M. D. Niemack , R. L. C. Ogando , L. A. Page , A. Palmese , B. Partridge , F. Paz-Chinchón , M. E. S. Pereira , A. Pieres , A. A. Plazas Malagón , J. Prat , M. Raveri , M. Rodriguez-Monroy , R. P. Rollins , A. K. Romer , E. S. Rykoff , M. Salatino , C. Sánchez , E. Sanchez , B. Santiago , V. Scarpine , A. Schillaci , L. F. Secco , S. Serrano , I. Sevilla-Noarbe , E. Sheldon , B. D. Sherwin , C. Sifón , M. Smith , M. Soares-Santos , S. T. Staggs , E. Suchyta , M. E. C. Swanson , G. Tarle , D. Thomas , C. To , M. A. Troxel , I. Tutusaus , E. M. Vavagiakis , J. Weller , E. J. Wollack , B. Yanny , B. Yin , Y. Zhang

We have carried out an extensive spectroscopic survey with the Keck and VLT telescopes, targeting lensed galaxies in the background of the massive cluster Abell 68. Spectroscopic measurements are obtained for 26 lensed images, including a…

We present 16-GHz Sunyaev-Zel'dovich observations using the Arcminute Microkelvin Imager (AMI) and subsequent Bayesian analysis of six galaxy clusters at redshift ($z \approx 1$) chosen from an X-ray and Infrared selected sample from…

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

Cold dark matter (CDM) hierarchical structure formation models predict the existence of large-scale accretion shocks between the virial and turnaround radii of clusters of galaxies. Kocsis et al. (2005) suggest that the Sunyaev-Zel'dovich…

宇宙学与河外天体物理 · 物理学 2014-11-18 Sandor M. Molnar , Nathan Hearn , Zoltán Haiman , Greg Bryan , August E. Evrard , Georg Lake

We report millimeter-wavelength observations of the Sunyaev-Zel'dovich (S-Z) effect in two distant galaxy clusters. A relativistically correct analysis of the S-Z data is combined with the results of X-ray observations to determine the…

天体物理学 · 物理学 2016-08-30 W. L. Holzapfel , P. A. R. Ade , S. E. Church , P. D. Mauskopf , Y. Rephaeli , T. M. Wilbanks , A. E. Lange

Recently, Jones et al. (1997) used the Ryle telescope, operating at a frequency of 15 GHz, to detect a flux decrement in the direction of the quasar pair PC1643+461A,B. They interpreted this signal as the Sunyaev-Zel'dovich effect (SZE)…

天体物理学 · 物理学 2015-06-24 W. L. Holzapfel , J. E. Carlstrom , L. Grego , M. Joy , E. D. Reese

The Sunyaev-Zel'dovich (SZ) effect of a cluster of galaxies is usually measured after background radio sources are removed from the cluster field. Gravitational lensing by the cluster potential leads to a systematic deficit in the residual…

天体物理学 · 物理学 2009-10-28 Abraham Loeb , Alexandre Refregier

Thanks to advances in detector technology and observing techniques, true Sunyaev-Zel'dovich (SZ) surveys will soon become a reality. This opens up a new window into the Universe, in many ways analogous to the X-ray band and inherently…

天体物理学 · 物理学 2007-05-23 James G. Bartlett

The intensity of the cosmic microwave background radiation in the fields of clusters of galaxies is modified by inverse Compton scattering in the hot intracluster gas - the Sunyaev-Zel'dovich (SZ) effect. The effect is expected to be most…

天体物理学 · 物理学 2009-10-30 Andrew W. Blain

The lensing of background QSOs by foreground galaxies is a powerful probe of the mass density of the Universe and the power spectrum of mass clustering. However, the 2dF QSO survey suggested that a strong anticorrelation effect at g<21 was…

天体物理学 · 物理学 2009-11-13 G. Mountrichas , T. Shanks

Using large numbers of simulations of the microwave sky, incorporating the Cosmic Microwave Background (CMB) and the Sunyaev-Zel'dovich (SZ) effect due to clusters, we investigate the statistics of the power spectrum at microwave…

宇宙学与河外天体物理 · 物理学 2010-11-02 Michael W. Peel , Richard A. Battye , Scott T. Kay

We use weak gravitational lensing measurements from Year 3 Dark Energy Survey data to calibrate the masses of 443 galaxy clusters selected via the Sunyaev-Zel'dovich effect from Atacama Cosmology Telescope Data Release 5 maps of the cosmic…

In a recent posting of a submitted paper Weatherley et al. re-analyse the spectroscopic data from our observations of Abell 1835 IR 1916, a galaxy we claimed to be at redshift z=10.0 (Pello et al., 2004, A&A, 416, L35). They conclude that…

天体物理学 · 物理学 2007-05-23 R. Pello , J. Richard , J. -F. Le Borgne , D. Schaerer

We present a new (2+1)D galaxy cluster finder based on photometric redshifts called Wavelet Z Photometric (WaZP) applied to DES first year (Y1A1) data. The results are compared to clusters detected by the South Pole Telescope (SPT) survey…

We present measurements of the stellar mass fractions ($f_\star$) for a sample of high-redshift ($0.93 \le z \le 1.32$) infrared-selected galaxy clusters from the Massive and Distant Clusters of WISE Survey (MaDCoWS) and compare them to the…