Speaker
Chris Gordon
(University of Canterbury)
Description
An anomalous excess emission has been found in Fermi-LAT data covering the centre of the Galaxy. We report on an analysis that exploits hydrodynamical modelling to register the position of interstellar gas associated with diffuse Galactic gamma-ray emission. Our analysis reveals that the excess gamma rays’ morphology is statistically well described by the X-shaped stellar over-density in the Galactic bulge and the nuclear stellar bulge. Given the non-spherical nature of these over-densities, we argue that the GCE is not a dark matter phenomenon but may rather be associated with the stellar population of the bulge and the nuclear bulge.
Primary author
Chris Gordon
(University of Canterbury)
