Bibcode
Harrison, D. L.; Watson, R. A.; Rubiño-Martin, J. A.; Macias-Perez, J. F.; Davies, R. D.; Rebolo, R.; Gutiérrez, C. M.; Davis, R. J.
Referencia bibliográfica
New Cosmological Data and the Values of the Fundamental Parameters, Proceedings of IAU Symposium #201, held 7-11 August 2000 at Manchester, United Kingdom. Edited by A. Lasenby and A. Wilkinson. San Francisco, CA: Astronomical Society of the Pacific (ASP), 2005., p.43
Fecha de publicación:
0
2005
Número de citas
0
Número de citas referidas
0
Descripción
The latest results from the Jodrell Bank -- IAC two-element 33 GHz
interferometer will be presented. Measurements are made of the amplitude
of Cosmic Microwave Background (CMB) fluctuations on angular scales of
1o (l =208 ± 18) and 2o (l = 106 ±
19). The first results on a deep scan at 2o resolution showed
a clear detection at all RAs with Δ T =
43+13-12μ K; the error was mainly due to sample
variance. This work has been extended to 5 Declination strips thereby
reducing the errors by a factor of 2-3. A deep scan at 1o
resolution gives Δ T = 63+7-6μ K. The
published results of high accuracy experiments (BOOMERanG, MAXIMA) for
the amplitude of the peak, around l ˜200, are converging to around
this level. Foregrounds are shown to contribute insignificantly at 33
GHz at intermediate and high galactic latitudes. The amplitude of
foreground signals is less than 3-5 μ K resulting in only a 1
percent reduction in the observed CMB signal when subtracted
quadratrically.