Reconstructing the inflationary power spectrum from cosmic microwave background radiation data

2001 ◽  
Vol 63 (4) ◽  
Author(s):  
Steen Hannestad
Keyword(s):  
Power Spectrum ◽  
Cosmic Microwave Background ◽  
Background Radiation ◽  
Cosmic Microwave Background Radiation ◽  
Microwave Background ◽  
Radiation Data ◽  
Microwave Background Radiation

scholarly journals Microwave Background Anisotropies in a Baryon-Dominated Universe

1988 ◽  
Vol 130 ◽  
pp. 513-513
Author(s):  
Yasushi Suto ◽  
Naoteru Gouda ◽  
Misao Sasaki
Keyword(s):  
Power Spectrum ◽  
Cosmic Microwave Background ◽  
Background Radiation ◽  
Cosmic Microwave Background Radiation ◽  
Microwave Background ◽  
Gauge Invariant ◽  
Invariant Method ◽  
Angular Scale ◽  
Microwave Background Radiation ◽  
Image Position

We have calculated the anisotropies of the cosmic microwave background radiation in a baryon-dominated model (BDM), using a gauge invariant method. The results on a 4.5′ angular scale are as follows (h = 0.5 and initially Zel'dovich power spectrum assumed):

scholarly journals Current Status of the Cosmic Microwave Background Radiation

1999 ◽  
Vol 183 ◽  
pp. 74-87
Author(s):  
R. B. Partridge
Keyword(s):  
Power Spectrum ◽  
Cosmic Microwave Background ◽  
Background Radiation ◽  
Cosmological Parameters ◽  
Theoretical Description ◽  
Cosmic Microwave Background Radiation ◽  
Current Status ◽  
Next Generation ◽  
Microwave Background ◽  
Microwave Background Radiation

My goal is to summarize our understanding of the cosmic microwave background radiation (CMBR) at this interesting moment after the detection of fluctuations in the background and before the next generation of satellite experiments. I begin by listing recent reviews and papers on the spectrum of the CMBR. I then sketch the current theoretical description of the power spectrum of fluctuations in the CMBR. Astronomical foregrounds and the nature of secondary fluctuations are treated next. Then I turn to observations, with special emphasis on the final results of the COBE–DMR experiment, on the growing evidence for ΔT/T = 2–3 × 10−5 fluctuations at degree scales, and on what they tell us about cosmological parameters.

Statistics of Cosmic Microwave Background Radiation with the Cosmic String Model

1997 ◽  
Vol 06 (05) ◽  
pp. 535-544
Author(s):  
Petri Mähönen ◽  
Tetsuya Hara ◽  
Toivo Voll ◽  
Shigeru Miyoshi
Keyword(s):  
Cosmic Microwave Background ◽  
Cosmic String ◽  
Large Scale ◽  
Background Radiation ◽  
Unit Length ◽  
Angular Size ◽  
Cosmic Microwave Background Radiation ◽  
Density Parameter ◽  
Microwave Background ◽  
Microwave Background Radiation

We have studied the cosmic microwave background radiation by simulating the cosmic string network induced anisotropies on the sky. The large-angular size simulations are based on the Kaiser–Stebbins effect calculated from full cosmic-string network simulation. The small-angular size simulations are done by Monte-Carlo simulation of perturbations from a time-discretized toy model. We use these results to find the normalization of μ, the string mass per unit length, and compare this result with one needed for large-scale structure formation. We show that the cosmic string scenario is in good agreement with COBE, SK94, and MSAM94 microwave background radiation experiments with reasonable string network parameters. The predicted rms-temperature fluctuations for SK94 and MSAM94 experiments are Δ T/T=1.57×10-5 and Δ T/T=1.62×10-5, respectively, when the string mass density parameter is chosen to be Gμ=1.4×10-6. The possibility of detecting non-Gaussian signals using the present day experiments is also discussed.

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