Position-space description of the cosmic microwave background and its temperature correlation function

被引:30
作者
Bashinsky, S [1 ]
Bertschinger, E
机构
[1] MIT, Ctr Theoret Phys, Cambridge, MA 02139 USA
[2] MIT, Ctr Space Res, Cambridge, MA 02139 USA
[3] MIT, Dept Phys, Cambridge, MA 02139 USA
关键词
D O I
10.1103/PhysRevLett.87.081301
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We suggest that the cosmic microwave background (CMB) temperature correlation function C(theta) as a function of angle provides a direct connection between experimental data and the fundamental cosmological quantities. The evolution of inhomogeneities in the prerecombination universe is studied using Green's functions in position space. We find that a primordial adiabatic point perturbation propagates as a sharp-edged spherical acoustic wave. Density singularities at its wave fronts create a feature in the CMB correlation function distinguished by a dip at theta approximate to 1.2 degrees. Characteristics of the feature are sensitive to the values of cosmological parameters, in particular to the total and the baryon densities.
引用
收藏
页码:813011 / 813014
页数:4
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