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We present results for the cross-correlation between the WMAP 1st-year cosmic microwave background (CMB) anisotropy data and optical galaxy surveys: the APM and SDSS DR1 catalogs. Our measurement of a positive CMB-galaxy correlation on…

天体物理学 · 物理学 2007-05-23 Pablo Fosalba , Enrique Gaztanaga , Francisco J. Castander

We present a 2.5 sigma detection of the Integrated Sachs-Wolfe (ISW) effect and discuss the constraints it places on cosmological parameters. We cross-correlate microwave temperature maps from the WMAP satellite with a 4000 deg^2 luminous…

Models with late time cosmic acceleration, such as the Lambda-dominated CDM model, predict a freeze out for the growth of linear gravitational potential at moderate redshift z<1, what can be observed as temperature anisotropies in the CMB:…

天体物理学 · 物理学 2009-11-07 Pablo Fosalba , Enrique Gaztanaga

We cross-correlate large scale structure (LSS) observations from a number of surveys with CMB anisotropies from WMAP to investigate the Integrated Sachs-Wolfe (ISW) effect as a function of redshift, covering z~0.1-2.5. Our main goal is to…

天体物理学 · 物理学 2008-11-26 Shirley Ho , Christopher M. Hirata , Nikhil Padmanabhan , Uros Seljak , Neta Bahcall

We perform a cross-correlation of the Cosmic Microwave Background (CMB) using the third year Wilkinson Microwave Anisotropy Probe (WMAP) data with the 2 Micron All Sky Survey (2MASS) galaxy map (about 828 000 galaxies with median redshift z…

天体物理学 · 物理学 2008-11-26 Anais Rassat , Kate Land , Ofer Lahav , Filipe B. Abdalla

Evidences for late-time acceleration of the Universe are provided by multiple probes, such as Type Ia supernovae, the cosmic microwave background (CMB) and large-scale structure (LSS). In this work, we focus on the integrated Sachs--Wolfe…

宇宙学与河外天体物理 · 物理学 2016-07-27 E. Moura Santos , F. C. Carvalho , M. Penna-Lima , C. P. Novaes , C. A. Wuensche

We estimated the cross-power spectra of a galaxy sample from the Wide-field Infrared Survey Explorer (WISE) survey with the 7-year Wilkinson Microwave Anisotropy Probe (WMAP) temperature anisotropy maps. A conservatively-selected galaxy…

宇宙学与河外天体物理 · 物理学 2015-06-04 Tomotsugu Goto , Istvan Szapudi , Benjamin R. Granett

The cross-correlation between cosmic microwave background (CMB) temperature anisotropies and the large scale structure (LSS) traced by the galaxy distribution, or sources at different wavelengths, is now well known. This correlation results…

天体物理学 · 物理学 2009-11-13 Asantha Cooray , Alessandro Melchiorri

We cross-correlate the Cosmic Microwave Background (CMB) temperature anisotropies observed by the Wilkinson Microwave Anisotropy Probe (WMAP) with the projected distribution of extended sources in the Two Micron All Sky Survey (2MASS). By…

天体物理学 · 物理学 2009-08-29 Niayesh Afshordi , Yeong-Shang Loh , Michael A. Strauss

We discuss the correlation between late-time integrated Sachs-Wolfe (ISW) effect in the cosmic microwave background (CMB) temperature anisotropies and the large scale structure of the local universe. This correlation has been proposed and…

天体物理学 · 物理学 2009-11-07 Asantha Cooray

We investigate the cross-correlation between the cosmic infrared and microwave backgrounds (CIB & CMB) anisotropies through the integrated Sachs-Wolfe effect. We first describe the CIB anisotropies using a linearly biased power spectrum,…

宇宙学与河外天体物理 · 物理学 2015-06-05 Stéphane Ilic

We predict the level of small-scale anisotropy in the cosmic microwave background (CMB) due to the Sunyaev--Zel'dovich (SZ) effect for the ensemble of cosmological models that are consistent with current measurements of large-scale CMB…

天体物理学 · 物理学 2009-11-07 Gilbert P. Holder

While most of the microwave background fluctuations on angular scales greater than a few arcminutes were generated at z > 800, the low redshift universe does distort the microwave background. Since the Sloan Digital Sky Survey (SDSS) traces…

天体物理学 · 物理学 2009-10-31 Hiranya V. Peiris , David N. Spergel

We investigate the cross-correlation between the cosmic infrared background (CIB) and cosmic microwave background (CMB) anisotropies due to the integrated Sachs-Wolfe (ISW) effect. We first describe the CIB anisotropies using a linearly…

宇宙学与河外天体物理 · 物理学 2011-09-06 S. Ilic , M. Douspis , M. Langer , A. Pénin , G. Lagache

The integrated Sachs-Wolfe (ISW) effect in the cosmic microwave background (CMB) as measured through its correlation with galaxies provides a unique opportunity to study the dynamics of the dark energy through its large scale clustering…

天体物理学 · 物理学 2011-05-12 Wayne Hu , Ryan Scranton

It is by now well established that the magnitude of the two-point angular-correlation function of the cosmic microwave background temperature anisotropies is anomalously low for angular separations greater than about 60 degrees. Physics…

宇宙学与河外天体物理 · 物理学 2016-09-07 Craig J. Copi , Márcio O'Dwyer , Glenn D. Starkman

We estimate the local density field in redshift shells to a maximum redshift of z=0.3, using photometric redshifts for the 2MASS galaxy catalogue, matched to optical data from the SuperCOSMOS galaxy catalogue. This density-field map is used…

宇宙学与河外天体物理 · 物理学 2015-05-14 C. L. Francis , J. A. Peacock

Recent measurements of hot and cold spots on the cosmic microwave background (CMB) sky suggest a presence of super-structures on (>100 h^{-1}Mpc) scales. We develop a new formalism to estimate the expected amplitude of temperature…

宇宙学与河外天体物理 · 物理学 2012-08-20 Kaiki Taro Inoue , Nobuyuki Sakai , Kenji Tomita

Integrated Sachs-Wolfe (ISW) effect can be estimated by cross-correlating Cosmic Microwave Background (CMB) sky with tracers of the local matter distribution. At late cosmic time, the dark energy induced decay of gravitation potential…

宇宙学与河外天体物理 · 物理学 2011-03-21 Guo-Chin Liu , Kin-Wang Ng , Ue-Li Pen

Models with dark energy decaying into dark matter have been proposed in Cosmology to solve the coincidence problem. We study the effect of such coupling on the cosmic microwave background temperature anisotropies. The interaction changes…

天体物理学 · 物理学 2008-11-26 German Olivares , Fernando Atrio-Brandela , Diego Pavon
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