Dobler, Finkbeiner et al.

   These physicists show indications that something is in the center of the Galaxy.

"This settles a long-standing question about the origin of the WMAP haze. Until recently, it has been argued that the WMAP haze had alternative explanations, such as free–free emission from hot gas or spinning dipole emission from rapidly rotating dust grains. However, the existence of this ICS signal proves that the microwave haze is indeed synchrotron emission from a hard electron spectrum."

You can read their paper here.

The electrons may come from unknown forms of matter.

No man is an island:

Acknowledgments: We acknowledge helpful conversations with Carlos Frenk, Igor Moskalenko, Simona Murgia, and Kent Wood. This work was partially supported by the Director, Office of Science, of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231. NW is supported by NSF CAREER grant PHY-0449818, and IC and NW are supported by DOE OJI grant # DE-FG02-06ER41417. TS is partially supported by a Sir Keith Murdoch Fellowship from the American Australian Association. This research made use of the NASA Astrophysics Data System (ADS) and the IDL Astronomy User’s Library at Goddard.13