Speaker
Dr
Tracy Slatyer
(Institute for Advanced Study)
Description
Observations of the gamma-ray sky by the Fermi Gamma-ray Space
Telescope have revealed a striking sharp-edged, double-lobed structure
in 1-100 GeV gamma rays, centered on the Galactic Center and extending
50 degrees north and south of the Galactic plane. The gamma-rays
associated with these "Fermi bubbles" have a significantly harder
spectrum than emission spatially correlated with maps of the SFD dust
and radio synchrotron, or with the diffuse model provided by the Fermi
collaboration. Possibly associated signals can be seen in microwaves
(associated with the WMAP Haze) and 1.5-2 keV X-rays. I will describe
the methods used to identify and analyze the bubbles, characterize
their spectrum and morphology, discuss their relation to the Fermi and
WMAP "Hazes" and the implications for dark matter searches, and
outline some possible interpretations and the challenges involved in
explaining all aspects of the signal.
Primary author
Dr
Tracy Slatyer
(Institute for Advanced Study)
