Testing cosmological models with the Integrated Sachs-Wolfe effect
نویسندگان
چکیده
منابع مشابه
Nonlinear integrated Sachs-Wolfe effect
We discuss the nonlinear extension to the integrated Sachs-Wolfe effect ~ISW! resulting from the divergence of the large scale structure momentum density field. The nonlinear ISW effect leads to an increase in the total ISW contribution by roughly two orders of magnitude at l;1000. This increase, however, is still below the cosmic variance limit of the primary anisotropies; at further small ang...
متن کاملADetection of the Integrated Sachs-Wolfe Effect
We have detected statistically significant correlations between the cosmic microwave background and two tracers of large-scale structure, the HEAO1 A2 full sky hard X-ray map (Boldt, 1987) and the NVSS 1.4 GHz, nearly full sky radio galaxy survey (Condon et al., 1998). The level of correlations in these maps is consistent with that predicted for the integrated Sachs-Wolfe (ISW) effect in the co...
متن کاملMeasuring dark energy with the integrated Sachs-Wolfe effect
I present to this conference our latest measurements of the integrated Sachs-Wolfe (ISW) effect. After a brief review of the reasons for which this effect arises and of the technique to detect it by cross-correlating the cosmic microwave background (CMB) with the large scale structure of the Universe (LSS), I describe the current state of the art measurement. This is obtained from a combined an...
متن کاملThe Sachs-Wolfe effect
We present a pedagogical derivation of the SachsWolfe effect, specifically the factor 3 relating the temperature fluctuations to gravitational potentials. The result arises from a cancellation between gravitational redshifts and intrinsic temperature fluctuations which can be derived from a coordinate transformation of the background.
متن کاملSachs-Wolfe effect in some anisotropic models
In this work it is shown that there are some spatially homogeneous but anisotropic models (Kantowski-Sachs and Bianchi type-III), with a positive cosmological constant, for which the inhomogeneities in the distribution of matter on the surface of the last scattering produce anisotropies (in large angular scales θ ∼ > 10 ◦) that do not differ from the ones produced in Friedmann-Lemâıtre-Robertso...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Physics: Conference Series
سال: 2011
ISSN: 1742-6596
DOI: 10.1088/1742-6596/280/1/012009