2007ApJ...664..687K


C.D.S. - SIMBAD4 rel 1.7 - 2019.11.12CET03:12:34

2007ApJ...664..687K - Astrophys. J., 664, 687-701 (2007/August-1)

Improved measurements of the CMB power spectrum with ACBAR.

KUO C.L., ADE P.A.R., BOCK J.J., BOND J.R., CONTALDI C.R., DAUB M.D., GOLDSTEIN J.H., HOLZAPFEL W.L., LANGE A.E., LUEKER M., NEWCOMB M., PETERSON J.B., REICHARDT C., RUHL J., RUNYAN M.C. and STANISZEWSKI Z.

Abstract (from CDS):

We report improved measurements of temperature anisotropies in the cosmic microwave background (CMB) radiation made with the Arcminute Cosmology Bolometer Array Receiver (ACBAR). In this paper, we use a new analysis technique and include 30% more data from the 2001 and 2002 observing seasons than the first release to derive a new set of band-power measurements with significantly smaller uncertainties. The planet-based calibration used previously has been replaced by comparing the flux of RCW 38 as measured by ACBAR and BOOMERANG to transfer the WMAP-based BOOMERANG calibration to ACBAR. The resulting power spectrum is consistent with the theoretical predictions for a spatially flat, dark energy-dominated ΛCDM cosmology, including the effects of gravitational lensing. Despite the exponential damping on small angular scales, the primary CMB fluctuations are detected with a signal-to-noise ratio of greater than 4, up to multipoles of ℓ=2000. This increase in the precision of the fine-scale CMB power spectrum leads to only a modest decrease in the uncertainties on the parameters of the standard cosmological model. At high angular resolution, secondary anisotropies are predicted to be a significant contribution to the measured anisotropy. A joint analysis of the ACBAR results at 150 GHz and the CBI results at 30 GHz in the multipole range 2000<ℓ<3000 shows that the power, reported by CBI in excess of the predicted primary anisotropy, has a frequency spectrum consistent with the thermal Sunyaev-Zel'dovich effect and inconsistent with primary CMB. The results reported here are derived from a subset of the total ACBAR data set; the final ACBAR power spectrum at 150 GHz will include 3.7 times more effective integration time and 6.5 times more sky coverage than is used here.

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Journal keyword(s): Cosmology: Cosmic Microwave Background - Cosmology: Observations

Simbad objects: 10

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Number of rows : 10

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 QSO B0208-512 BLL 02 10 46.2000629834 -51 01 01.893312084   17.10 16.93 14.82   ~ 374 1
2 PKS 0212-511 Rad 02 14 27.20 -50 53 53.0           ~ 2 1
3 QSO B0252-549 QSO 02 53 29.1801951289 -54 41 51.434480198   17.65 19.3 16.79   ~ 96 1
4 PMN J0439-4522 Rad 04 39 02.0 -45 22 19           ~ 5 0
5 QSO B0450-469 Bla 04 51 53.3490998299 -46 53 19.903710423   19.0 19.0     ~ 25 1
6 QSO B0454-463 QSO 04 55 50.7729726039 -46 15 58.684031092   17.89 17.4 16.87   ~ 178 1
7 2MASS J05144394-4554358 Bz? 05 14 43.9603150934 -45 54 35.551521477       19.14   ~ 7 0
8 6dFGS gJ051545.2-455643 Sy1 05 15 45.2500502966 -45 56 43.201382295   18.18 17.5 17.31   ~ 79 1
9 RCW 38 SFR 08 59 05.50 -47 30 39.4           ~ 260 2
10 QSO B2232-488 QSO 22 35 13.23657712 -48 35 58.7945006   17.61 17.2     ~ 106 1

    Equat.    Gal    SGal    Ecl

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2019.11.12-03:12:34

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