Gamma-ray image of Fermi bubbles (IMAGE)
Caption
Gamma-ray image of the Fermi bubbles (blue) overlaid on a map of RR Lyrae stars (red) observed by the GAIA telescope. The shape and orientation of the Sagittarius dwarf (Sgr) match those of the Fermi cocoon perfectly well – a bright substructure of gamma-ray radiation in the southern part of the Fermi bubbles. This is strong evidence that the Fermi cocoon is due to energetic processes occurring in the Sagittarius dwarf galaxy, which from our perspective, is located behind the Fermi bubbles.
Credit
Image: Crocker, Macias, Mackey, Krumholz, Ando, Horiuchi et al. (2022)
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