Unveiling the Origin of the Fermi/eRosita Bubbles
H.Y.K. Yang*, M. Ruszkowski and E. Zweibel
February 15, 2023
The newly launched eRosita X-ray satellite revealed two gigantic bubbles extending to ~80 degrees above and below the Galactic center (GC) in the Milky Way Galaxy. The morphology of these eRosita bubbles bears a remarkable resemblance to the Fermi bubbles discovered in the gamma-ray band by the Fermi Gamma-ray Space Telescope in 2010, suggesting that they may share the same origin. The symmetry about the GC of the Fermi/eRosita bubbles suggests that they likely originate from powerful energy injections from theGCsometime in the past, such as a nuclear starburst, or activity from the central supermassive black hole (SMBH). In this proceedings, I will briefly review the progress made in terms of our understanding of the physical origin of the bubbles. In particular, I will highlight the importance of the new observational constraints brought by the eRosita mission, and discuss recent simulation results that support a scenario where the Fermi/eRosita bubbles are simultaneously generated by past jet activity of the SMBH a few million years ago.
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