Schuster Colloquium 7th May - Professor Subir Sarkar, University of Oxford
All staff and students are invited to attend the Schuster Colloquium on Wednesday 7th May 2014 at 14.30 in the Rutherford Lecture Theatre, Schuster Building, when Professor Subir Sarkar, University of Oxford, will be speaking on the following topic: "Has BICEP2 proved cosmological inflation?"
The recent detection by the BICEP2 telescope at the South Pole of a "B-mode polarisation" signal in the cosmic microwave background has been widely hailed as the first direct evidence of inflation in the early universe. The signal has been attributed to gravitational waves generated during inflation with an amplitude about 20% of the scalar density fluctuations. However the signal has been seen at only one frequency and the Planck satellite has not confirmed it yet. Such a signal may plausibly be due to foreground emission from our Galaxy, in particular by magnetised dust grains in an old supernova remnant shell which crosses the field of view of BICEP2.