Title：Cosmology from the CMB power spectrum of the 2500 sq. deg South Pole Telescope Survey

Abstract：We explore extensions to the standard ΛCDM cosmological model using new measurements of the cosmic microwave background (CMB) from the South Pole Telescope (SPT). Adding SPT measurements to WMAP 7 significantly improves constraints on possible extensions to the ΛCDM model; the addition of low-redshift measurements of the Hubble constant (H0 ) and baryon acoustic oscillation feature (BAO) leads to further improvements. Before combining these datasets, we check for consistency in the LCDM model between measurements of the CMB (SPT+WMAP 7), H0 and BAO, and find evidence for some tension between the datasets. Within the CMB data alone, we find only weak support for physics beyond the ΛCDM model due to a slight trend of decreasing power at smaller angular scales, relative to the prediction of the ΛCDM model.  We discuss the physical story of how the constraints on the extensions to the LCDM model could be improved by adding the SPT data and other measurements.

Title：The Universe According to Planck

Abstract：Planck is the third-generation satellite aimed at measuring the cosmic microwave background, a relic of the hot big bang. Launched in May 2009 Planck has surveyed the full sky at high sensitivity, high angular resolution and with a broad range of frequencies from 30 to 857 GHz.  This broad frequency coverage gives Planck a unique view of the history of the universe from the epoch of recombination to the present. In this talk about our first cosmology results we will present our sky maps and their statistical properties and explain how we use them to reach conclusions about the standard cosmological model and extensions to this model.  We will consider consistency with other cosmological measurements, and what we can conclude by combining them with Planck.

报 告 人：侯臻

报告时间：6月26日15:30（周三）

地　  点：南京大学苏富特一楼会议室