Measuring the small angular scale cosmic microwave background temperature anisotropy with the QUaD telescope.

摘要

I present measurements of the cosmic microwave background (CMB) radiation temperature anisotropy using the QUaD telescope, a several arcminute resolution bolometric polarimeter operating at 100 and 150 GHz, located at the South Pole. The results presented here are targeted to the multipole range 2000 ℓ 3000 using data from QUaD's second and third observing seasons. After masking the brightest point sources in the maps the results are consistent with the primary ΛCDM expectation alone. I further 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 chi 2. I then fit a standard SZ template to the bandpowers and see no strong evidence of an SZ contribution, which is as expected for sigma 8 ≈ 0:8; the best-fit value for the template amplitude is ASZ = 1.2+1.2-1.1 .