CONSTRAINTS ON THE HIGH-l POWER SPECTRUM OF MILLIMETER-WAVE ANISOTROPIES FROM APEX-SZ
CL Reichardt, O Zahn, PAR Ade, K Basu, AN Bender, F Bertoldi, H-M Cho, G Chon, M Dobbs, D Ferrusca, NW Halverson, WL Holzapfel, C Horellou, D Johansson, BR Johnson, J Kennedy, R Kneissl, T Lanting, AT Lee, M Lueker Show all
ASTROPHYSICAL JOURNAL | IOP PUBLISHING LTD | Published : 2009
We present measurements of the angular power spectrum of millimeter wave anisotropies with the APEX-SZ instrument. APEX-SZ has mapped 0.8deg2 of sky at a frequency of 150GHz with an angular resolution of 1′. These new measurements significantly improve the constraints on anisotropy power at 150GHz over the range of angular multipoles 3000 < ℓ < 10, 000, limiting the total astronomical signal in a flat band power to be less than 105 μK2 at 95% CL. We expect both submillimeter-bright, dusty galaxies and to a lesser extent secondary cosmic microwave background anisotropies from the Sunyaev-Zel'dovich effect (SZE) to significantly contribute to the observed power. Subtracting the SZE power spect..View full abstract
Awarded by National Science Foundation
Awarded by US Department of Energy
We thank the staff at the APEX telescope site, led by David Rabanus and previously by Lars-Ake Nyman, for their dedicated and exceptional support. We also thank LBNL engineers John Joseph and Chinh Vu for their work on the readout electronics. APEX-SZ is funded by the National Science Foundation under Grant No. AST-0138348. Work at LBNL is supported by the Director, Office of Science, Office of High Energy and Nuclear Physics, of the US Department of Energy under Contract No. DE-AC02-05CH11231. Work at McGill is supported by the Natural Sciences and Engineering Research Council of Canada and the Canadian Institute for Advanced Research. This research used resources of the National Energy Research Scientific Computing Center, which is supported by the Office of Science of the US Department of Energy under Contract No. DE-AC02-05CH11231. N.H. acknowledges support from an Alfred P. Sloan Research Fellowship.