Imperial College London
Alternate

Professor Andrew H Jaffe

Faculty of Natural Sciences, Department of Physics

Professor of Astrophysics and Cosmology
 
 
 
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Contact

 

+44 (0)20 7594 7526a.jaffe Website

 
 
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Assistant

 

Miss Louise Hayward +44 (0)20 7594 7679

 
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Location

 

1018BBlackett LaboratorySouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Jaffe:1998:10.1103/PhysRevD.58.043001,
author = {Jaffe, AH and Kamionkowski, M},
doi = {10.1103/PhysRevD.58.043001},
journal = {Physical Review D - Particles, Fields, Gravitation and Cosmology},
pages = {10--4300110},
title = {Calculation of the Ostriker-Vishniac effect in cold dark matter models},
url = {http://dx.doi.org/10.1103/PhysRevD.58.043001},
volume = {58},
year = {1998}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - We present a new derivation of the cosmic microwave background anisotropy spectrum from the Ostriker-Vishniac effect for an open, flat, or closed universe, and calculate the anisotropy expected in cold dark matter (CDM) models. We provide simple semi-analytic fitting formulas for the Vishniac power spectrum that can be used to evaluate the expected anisotropy in CDM models for any arbitrary ionization history. In a flat universe, CDM models normalized to cluster abundances produce rms temperature anisotropies of 0.8–2.4 μK on arcminute angular scales for a constant ionization fraction of unity, whereas an ionization fraction of 0.2 yields rms anisotropies of 0.3–0.8 μK. In an open and/or high-baryon-density universe, the level of anisotropy is somewhat higher. The signal in some of these models may be detectable with planned interferometry experiments. The damping of the acoustic peaks in the primary-anisotropy spectrum at degree angular scales depends primarily on the optical depth and only secondarily on the epoch of reionization. On the other hand, the amplitude of Ostriker-Vishniac anisotropies depends sensitively on the epoch of reionization. Therefore, when combined with the estimate of the reionization optical depth provided by maps of degree-scale anisotropies, the Ostriker-Vishniac effect can provide a unique probe of the epoch of reionization. © 1998 The American Physical Society.
AU  - Jaffe,AH
AU  - Kamionkowski,M
DO  - 10.1103/PhysRevD.58.043001
EP  - 4300110
PY  - 1998///
SN  - 1550-7998
SP  - 10
TI  - Calculation of the Ostriker-Vishniac effect in cold dark matter models
T2  - Physical Review D - Particles, Fields, Gravitation and Cosmology
UR  - http://dx.doi.org/10.1103/PhysRevD.58.043001
VL  - 58
ER  -
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