Files and links (2)
SubmittedOpen Access (License Unspecified), Open
Preprint
Binned Cosmic Microwave Background Anisotropy Power Spectra: Peak Location
arXiv.org, v 559(1)
15 Feb 2001
Abstract
We use weighted mean and median statistics techniques to combine individual cosmic microwave background (CMB) anisotropy detections and determine binned, multipole-space, CMB anisotropy power spectra. The resultant power spectra are peaked. The derived weighted-mean CMB anisotropy power spectrum is not a good representation of the individual measurements in a number of multipole-space bins, if the CMB anisotropy is Gaussian and correlations between individual measurements are small. This could mean that some observational error bars are underestimated, possibly as a consequence of undetected systematic effects. Discarding the most discrepant 5% of the measurements alleviates but does not completely resolve this problem. The median-statistics power spectrum of this culled data set is not as constraining as the weighted-mean power spectrum. Nevertheless it indicates that there is more power at multipoles \(\ell \sim 150-250\) than is expected in an open cold dark matter (CDM) model, and it is more consistent with a flat CDM model. Unlike the weighted-mean power spectrum, the median-statistics power spectrum at \(\ell \sim 400-500\) does not exclude a second peak in the flat CDM model.
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Details
- Title
- Binned Cosmic Microwave Background Anisotropy Power Spectra: Peak Location
- Creators
- Silviu Podariu - Kansas State UniversityTarun Souradeep - Kansas State UniversityJ GottBharat Ratra - Kansas State UniversityMichael Vogeley - Drexel University
- Publication Details
- arXiv.org, v 559(1)
- Publisher
- Cornell University Library, arXiv.org; Ithaca
- Resource Type
- Preprint
- Language
- English
- Academic Unit
- Physics
- Web of Science ID
- WOS:000171371300002
- Scopus ID
- 2-s2.0-0035922250
- Other Identifier
- 991019168816104721
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- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Astronomy & Astrophysics