High Energy Physics Seminar: Francesca Day, University of Oxford  Add To Calendar

  • Date(s): Wednesday, 10/12 11:00 AM to Wednesday, 10/12 12:00 PM
  • Speaker: Francesca Day
  • Host: James Unwin
  • Campus Address: 2214 SES (Science and Engineering South)

Title: New Physics in X-ray Data.

Abstract: I will discuss searches for new physics using ultra-deep X-ray observations of the central Active Galactic Nucleus of the Perseus galaxy cluster. We find two anomalies at high significance that we are unable to account for through conventional instrumental or astrophysical processes. In particular, we find a dip at 3.5 keV in the spectrum of the AGN. This is at the same energy as the long-standing 3.5 keV line observed in galaxy clusters. Taken together, these unexplained features are compelling hints of new physics. I will present a model of Fluorescent Dark Matter, which explains both the line and the dip at 3.5 keV. In this model, the recent non-observation of the 3.5 keV line by Hitomi is fully consistent.

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