The amplitude and spectral index of the large angular scale anisotropy in the cosmic microwave background radiation
نویسندگان
چکیده
منابع مشابه
The Amplitude and Spectral Index of the Large Angular Scale Anisotropy in the Cosmic Microwave Background Radiation
In many cosmological models, the large angular scale anisotropy in the cosmic microwave background is parameterized by a spectral index, n, and a quadrupolar amplitude, Q. For a Peebles-Harrison-Zel’dovich spectrum, n = 1. Using data from the Far Infra-Red Survey (FIRS) and a new statistical measure, a contour plot of the likelihood for cosmological models for which −1 < n < 3 and 0 ≤ Q ≤ 50 μK...
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In addition to its spectrum and temperature anisotropy, the 2.7 K Cosmic Microwave Background (CMB) is also expected to exhibit a low level of polarization. The spatial power spectrum of the polarization can provide details about the formation of structure in the universe as well as its ionization history. Here we calculate the magnitude of the CMB polarization in various cosmological scenarios...
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B. Allen,1 R. R. Caldwell,2 E. P. S. Shellard,2 A. Stebbins,3 and S. Veeraraghavan4 1Department of Physics, University of Wisconsin—Milwaukee, P.O. Box 413, Milwaukee, Wisconsin 53201 2University of Cambridge, Department of Applied Mathematics and Theoretical Physics, Silver Street, Cambridge CB3 9EW, United Kingdom 3NASAyFermilab Astrophysics Center, P.O. Box 500, Batavia, Illinois 60510 4Univ...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 1994
ISSN: 0004-637X,1538-4357
DOI: 10.1086/187500