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Published August 1, 2009 | Published
Journal Article Open

Small Angular Scale Measurements of the Cosmic Microwave Background Temperature Power Spectrum From QUaD


We present measurements of the cosmic microwave background (CMB) radiation temperature anisotropy in the multipole range 2000 < ℓ < 3000 from the QUaD telescope's second and third observing seasons. After masking the brightest point sources our results are consistent with the primary ΛCDM expectation alone. We estimate the contribution of residual (un-masked) radio point sources using a model calibrated to our own bright source observations, and a full simulation of the source finding and masking procedure. Including this contribution slightly improves the χ^2. We also fit a standard Sunyaev-Zel'dovich (SZ) template to the bandpowers and see no strong evidence of an SZ contribution, which is as expected for σ_8 ≈ 0.8.

Additional Information

© 2009 American Astronomical Society. Print publication: Issue 2 (2009 August 1); received 2009 January 27, accepted for publication 2009 June 26; published 2009 July 20. We thank Gianfranco De Zotti for providing us with his radio source counts at 100 and 150 GHz. QUaD is funded by the National Science Foundation in the USA, through grants AST- 0096778, ANT-0338138, ANT-0338335, and ANT-0338238, by the UK Science and Technology Facilities Council (STFC) and its predecessor the Particle Physics and Astronomy Research Council (PPARC), and by the Science Foundation Ireland. J.R.H. acknowledges the support of an NSF Graduate Research Fellowship, a Stanford Graduate Fellowship and a NASA Postdoctoral Fellowship. C.P. acknowledges partial support from the Kavli Institute for Cosmological Physics through the grant NSF PHY-0114422. E.Y.W. acknowledges receipt of an NDSEG fellowship. Y.M. acknowledges support from a SUPA Prize studentship. P.G.C. acknowledges funding from the Fundação para a Ciência e a Tecnologia. M.Z. acknowledges support from a NASA Postdoctoral Fellowship.

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