CCAPP Seminar: "The Universe According to Planck" Douglas Scott (UBC)

March 10, 2016
Tuesday, April 19, 2016 - 11:30am to 12:30pm
PRB 4138
Oval

The Planck satellite has completed its mission to map the entire microwave sky at nine separate frequencies. A new data release was made in February 2015, based on the full mission, and including some polarization data for the first time. The team is now working towards the final (2016) data release. More than 100 papers have already been produced, covering many different aspects of the sky at these wavelengths. We have learned in detail about the physics of the interstellar medium in our Galaxy, and to remove this foreground emission in order to extract the cosmological information from the cosmic microwave background (CMB). Planck's measurements lead to an improved determination of the basic model that describes the Universe on the very largest scales. In particular, a 6-parameter model fits the CMB data very well, with no strong evidence for extensions to that scenario. There are constraints on inflationary models, neutrino physics, dark energy and many other theoretical ideas. New cosmological probes include CMB lensing, CMB-extracted clusters of galaxies, the Cosmic Infrared Background and constraints on large-scale velocities. This talk will highlight some of the newest results, including the improvements coming from the addition of the polarization dimension.

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