Subdegree Sunyaev-Zel'dovich Signal from Multifrequency BOOMERanG observations
Abstract
The Sunyaev-Zel'dovich (SZ) effect is the inverse Compton-scattering of cosmic microwave background (CMB) photons by hot electrons in the intervening gas throughout the universe. The effect has a distinct spectral signature that allows its separation from other signals in multifrequency CMB datasets. Using CMB anisotropies measured at three frequencies by the BOOMERanG 2003 flight we constrain SZ fluctuations in the 10 arcmin to 1 deg angular range. Propagating errors and potential systematic effects through simulations, we obtain an overall upper limit of 15.3 uK (2 sigma) for rms SZ fluctuations in a broad bin between multipoles of of 250 and 1200 at the Rayleigh-Jeans (RJ) end of the spectrum. When combined with other CMB anisotropy and SZ measurements, we find that the local universe normalization of the density perturbations is sigma-8(SZ) < 0.96 at the 95% confidence level, consistent with sigma-8 determined from primordial perturbations.
Keywords
Cite
@article{arxiv.0904.4313,
title = {Subdegree Sunyaev-Zel'dovich Signal from Multifrequency BOOMERanG observations},
author = {M. Veneziani and A. Amblard and A. Cooray and F. Piacentini and D. Pietrobon and P. Serra and P. A. R. Ade and J. J. Bock and J. R. Bond and J. Borrill and A. Boscaleri and P. Cabella and C. R. Contaldi and B. P. Crill and P. de Bernardis and G. De Gasperis and A. de Oliveira-Costa and G. De Troia and G. Di Stefano and K. M. Ganga and E. Hivon and W. C. Jones and T. S. Kisner and A. E. Lange and C. J. MacTavish and S. Masi and P. D. Mauskopf and A. Melchiorri and T. E. Montroy and P. Natoli and C. B. Netterfield and E. Pascale and G. Polenta and S. Ricciardi and G. Romeo and J. E. Ruhl and P. Santini and M. Tegmark and N. Vittorio},
journal= {arXiv preprint arXiv:0904.4313},
year = {2009}
}
Comments
accepted for publication in ApJ. Letters