The cosmic microwave background power spectrum out to l=1400 measured by the Very Small Array

被引：99
作者：
Grainge, K
Carreira, P
Cleary, K
Davies, RD
Davis, RJ
Dickinson, C
Genova-Santos, R
Gutiérrez, CM
Hafez, YA
Hobson, MP
Jones, ME
Kneissl, R
Lancaster, K
Lasenby, A
Leahy, JP
Maisinger, K
Pooley, GG
Rebolo, R
Rubiño-Martin, JA
Molina, PJS
Ödman, C
Rusholme, B
Saunders, RDE
Savage, R
Scott, PF
Slosar, A
Taylor, AC
Titterington, D
Waldram, E
Watson, RA
Wilkinson, A
机构：
[1] Univ Cambridge, Cavendish Lab, Astrophys Grp, Cambridge CB3 0HE, England
[2] Univ Manchester, Jodrell Bank Observ, Macclesfield SK11 9DL, Cheshire, England
[3] Inst Astrofis Canarias, Tenerife 38200, Spain
[4] CSIC, Madrid, Spain
来源：
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2003年 / 341卷 / 04期
关键词：
cosmic microwave background; cosmology : observations;
D O I：
10.1046/j.1365-8711.2003.06563.x
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We have observed the cosmic microwave background (CMB) in three regions of sky using the Very Small Array (VSA) in an extended configuration with antennas of beamwidth 2degrees at 34 GHz. Combined with data from previous VSA observations using a more compact array with larger beamwidth, we measure the power spectrum of the primordial CMB anisotropies between angular multipoles l = 160 and 1400. Such measurements at high l are vital for breaking degeneracies in parameter estimation from the CMB power spectrum and other cosmological data. The power spectrum clearly resolves the first three acoustic peaks, shows the expected fall-off in power at high l and starts to constrain the position and height of a fourth peak.
引用
收藏
页码：L23 / L28
页数：6
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