Analyzing the cosmic variance limit of remote dipole measurements of the cosmic microwave background using the large-scale kinetic Sunyaev Zel'dovich effect
作者： Alexandra Terrana , Alexandra Terrana , Mary-Jean Harris , Matthew C. Johnson , Matthew C. Johnson
DOI: 10.1088/1475-7516/2017/02/040
关键词:
摘要: Due to cosmic variance we cannot learn any more about large-scale inhomogeneities from the primary microwave background (CMB) alone. More information on large scales is essential for resolving angular scale anomalies in CMB. Here consider cross correlating kinetic Sunyaev Zel'dovich (kSZ) effect and probes of structure, a technique known as kSZ tomography. The statistically anisotropic component correlation encodes CMB dipole seen by free electrons throughout observable Universe, providing long wavelength inhomogeneities. We compute power asymmetry, constructing appropriate transfer functions, estimate limited signal noise variety redshift bin configurations. significant over range multipoles numbers bins. present simple mode counting argument indicating that tomography can be used modes than comparable scales. A basic forecast indicates first detection could made with next-generation experiments galaxy surveys. This paper motivates systematic investigation how close limit it will possible get future observations.
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