The dependence of cosmological parameters estimated from the microwave background on non-gaussianity
The estimation of cosmological parameters from cosmic microwave experiments has almost always been performed assuming Gaussian data. In this paper, the sensitivity of the parameter estimation to different assumptions on the probability distribution of the fluctuations is tested. Specifically, adopti...
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| Main Author: | |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
2002
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| In: |
The astrophysical journal
Year: 2002, Volume: 569, Issue: 2, Pages: 595-599 |
| ISSN: | 1538-4357 |
| DOI: | 10.1086/339421 |
| Online Access: | Verlag, kostenfrei, Volltext: http://dx.doi.org/10.1086/339421 Verlag, kostenfrei, Volltext: http://stacks.iop.org/0004-637X/569/i=2/a=595 
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| Author Notes: | Luca Amendola, Osservatorio Astronomico di Roma, Via Frascati, 00040 Monteporzio Catone, Italy |
| Summary: | The estimation of cosmological parameters from cosmic microwave experiments has almost always been performed assuming Gaussian data. In this paper, the sensitivity of the parameter estimation to different assumptions on the probability distribution of the fluctuations is tested. Specifically, adopting the Edgeworth expansion, I show how the cosmological parameters depend on the skewness of the C ℓ spectrum. In the particular case of skewness independent of ℓ, I find that the primordial slope, the baryon density, and the cosmological constant increase with the skewness. |
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| Item Description: | Gesehen am 17.11.2017 |
| Physical Description: | Online Resource |
| ISSN: | 1538-4357 |
| DOI: | 10.1086/339421 |