|What is creating the gamma rays at the center of our Galaxy?
Excitement is building that one answer is elusive
Over the past few years the orbiting
Gamma-ray Space Telescope
has been imaging our Galaxy's center in
indicate that the region surrounding the
Galactic center seems too bright to be accounted by
known gamma-ray sources.
A raw image of the
Galactic Center region in gamma-rays is shown above on the left,
while the image on the right has all known sources subtracted -- leaving an unexpected excess.
hypothetical model that seems to fit the excess involves a type of
dark matter known as
WIMPs, which may be colliding with themselves to create the detected gamma-rays.
This hypothesis is controversial, however, and debate and
more detailed investigations are ongoing.
Finding the nature of dark matter is one of the great quests of
modern science, as previously this unusual type of
cosmologically pervasive matter has shown itself only through
T. Daylan et al.,
Fermi Space Telescope,