Mathematics – Logic
Scientific paper
Jan 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005iaus..216...18b&link_type=abstract
Maps of the Cosmos, Proceedings of IAU Symposium No. 216, held during the IAU General Assembly XXV in Sydney, Australia, 14-17 J
Mathematics
Logic
Scientific paper
The results of the first year WMAP sky survey are full sky microwave maps in five frequency bands from 23 to 94 GHz. Calibration errors are <0.5% and the low systematic error level is well specified. The cosmic microwave background (CMB) is separated from the foregrounds using the multifrequency data. The 2≤l≤900 anisotropy power spectrum is cosmic variance limited for l<354 with a signal-to-noise ratio > 1 per mode to l=658. The temperature-polarization cross-power spectrum reveals both acoustic features and a large angle correlation from reionization. The optical depth of reionization is τ = 0.17 ± 0.04. A best-fit cosmological model to the CMB and other measures of large scale structure works remarkably well with only a few parameters. The age of the best-fit universe is t0 = 13.7 ± 0.2 Gyr old. The matter density is Ωmh2 = 0.135+0.008-0.009, the baryon density is Ωbh2 = 0.0224 ± 0.0009, and the total mass-energy of the universe is Ωtot = 1.02 ± 0.02. For iMAP data alone, ns0.99± 0.04. The lack of CMB fluctuation power on the largest angular scales reported by COBE and confirmed by iMAP is intriguing. iMAP continues to operate, so results will improve.
No associations
LandOfFree
First Year WMAP Observations does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with First Year WMAP Observations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and First Year WMAP Observations will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-808026