中文
相关论文

相关论文: Sunyaev-Zeldovich effect in WMAP and its effect on…

200 篇论文

The improving sensitivity of measurements of the kinetic Sunyaev-Zel'dovich (SZ) effect opens a new window into the thermodynamic properties of the baryons in halos. We propose a methodology to constrain these thermodynamic properties by…

宇宙学与河外天体物理 · 物理学 2017-12-13 Nicholas Battaglia , Simone Ferraro , Emmanuel Schaan , David Spergel

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…

We introduce a new statistic to measure more accurately the cosmic sound speed of clusters of galaxies at different redshifts. This statistic is evaluated by cross-correlating cosmic microwave background (CMB) fluctuations caused by the…

天体物理学 · 物理学 2009-11-10 F. Atrio--Barandela , A. Kashlinsky , J. P. Mücket

The key to understand the nature of dark energy relies in our ability to probe the distant Universe. In this framework, the recent detection of the kinematic Sunyaev-Zel'dovich (kSZ) effect signature in the cosmic microwave background…

宇宙学与河外天体物理 · 物理学 2018-09-05 M. Roncarelli , M. Baldi , F. Villaescusa-Navarro

The thermal Sunyaev-Zel'dovich (tSZ) effect is a spectral distortion of the cosmic microwave background (CMB) resulting from inverse Compton scattering of CMB photons with electrons in the medium of galaxy clusters. The spectrum of the tSZ…

宇宙学与河外天体物理 · 物理学 2023-05-18 David Zegeye , Thomas Crawford , Wayne Hu

We study the SZ-effect-induced non-Gaussianity in the cosmic microwave background (CMB) fluctuation maps. If a CMB map is contaminated by the SZ effect of galaxies or galaxy clusters, the CMB maps should have similar non-Gaussian features…

天体物理学 · 物理学 2009-11-11 Liang Cao , Yao-Quan Chu , Li-Zhi Fang

We develop an optimization-based maximum likelihood approach to analyze the cross-correlation of the Cosmic Microwave Background (CMB) and large-scale structure induced by the kinetic Sunyaev-Zeldovich (kSZ) effect. Our main goal is to…

宇宙学与河外天体物理 · 物理学 2024-03-01 Yurii Kvasiuk , Moritz Münchmeyer

The hot electrons in the intra-cluster medium produce a spectral distorsion of the cosmic microwave background (CMB) black body emission, the thermal Sunyaev-Zel'dovich effect (tSZ). This characteristic spectral distorsion is now commonly…

宇宙学与河外天体物理 · 物理学 2017-08-23 G. Hurier , C. Tchernin

We investigate the impact of $1/f$ noise on cosmology for an intensity mapping survey with SKA1-MID Band\,1 and Band\,2. We use a Fisher matrix approach to forecast constraints on cosmological parameters under the influence of $1/f$ noise,…

宇宙学与河外天体物理 · 物理学 2020-01-08 T. Chen , R. A. Battye , A. A. Costa , C. Dickinson , S. E. Harper

We use a new approach based on self-supervised deep learning networks originally applied to transparency separation in order to simultaneously extract the components of the extragalactic submillimeter sky, namely the cosmic microwave…

宇宙学与河外天体物理 · 物理学 2024-06-05 V. Bonjean , H. Tanimura , N. Aghanim , T. Bonnaire , M. Douspis

We consider the distortion in the cosmic microwave background (CMB) due to galactic winds at high redshift. Winds outflowing from galaxies have been hypothesized to be possible sources of metals in the intergalactic medium, which is known…

天体物理学 · 物理学 2009-10-31 Subhabrata Majumdar , Biman Nath , Masashi Chiba

Cosmic microwave background radiation can supply us some most significant parts of the information on the universe. Some researchers believe that The gravitational system cannot be decribed by the standard statistical mechanics. In this…

宇宙学与河外天体物理 · 物理学 2023-01-03 Yang Liu

We present the first calculation of the kinetic Sunyaev-Zel'dovich (kSZ) effect due to the inhomogeneous reionization of the universe based on detailed large-scale radiative transfer simulations of reionization. The resulting sky power…

天体物理学 · 物理学 2011-02-11 Ilian T. Iliev , Ue-Li Pen , J. Richard Bond , Garrelt Mellema , Paul R. Shapiro

Taking advantage of the reduced levels of noise and systematics in the data of the latest Planck release (PR4, also known as NPIPE), we construct a new all-sky Compton-$y$ parameter map (hereafter, $y$-map) of the thermal Sunyaev-Zeldovich…

宇宙学与河外天体物理 · 物理学 2023-12-15 Jyothis Chandran , Mathieu Remazeilles , R. B. Barreiro

In the present work, we propose a new method aiming at extracting the kinetic Sunyaev-Zel'dovich (KSZ) temperature fluctuations embedded in the primary anisotropies of the cosmic microwave background (CMB). We base our study on simulated…

天体物理学 · 物理学 2009-11-10 O. Forni , N. Aghanim

We demonstrate the Sunyaev-Zel'dovich (SZ) effect imaging capabilities of the Combined Array for Research in Millimeter-wave Astronomy (CARMA) by presenting an SZ map of the galaxy cluster RXJ1347.5-1145. By combining data from multiple…

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 calculate the one-point probability density distribution functions (PDF) and the power spectra of the thermal and kinetic Sunyaev-Zeldovich (tSZ and kSZ) effects and the mean Compton Y parameter using the Magneticum Pathfinder…

宇宙学与河外天体物理 · 物理学 2016-08-24 Klaus Dolag , Eiichiro Komatsu , Rashid Sunyaev

We use high-resolution hydrodynamical simulations of large-scale structure formation to study the imprints of the local superclusters onto the full-sky Sunyaev-Zel'dovich (SZ) signals. Following (Mathis et al. 2002), the initial conditions…

天体物理学 · 物理学 2009-11-11 K. Dolag , F. K. Hansen , M. Roncarelli , L. Moscardini

The first-year WMAP data, in combination with any one of a number of other cosmic probes, show that we live in a flat \Lambda-dominated CDM universe with \Omega_m ~ 0.27 and \Omega_\Lambda ~ 0.73. In this model the late-time action of the…

‹ 上一页 1 8 9 10 下一页 ›