The central SMBH’s accretion disk has injected a huge amount of X-ray energy into the ISM, the inter-stellar medium, the gas & dust that you make new stars from. This appears to be causing the ISM to blow out of the galaxy in all directions. In the words of the scientific paper, it’s "… an unprecedented, homogeneous, large-scale turbulent outflow…" with some parts traveling at 2 million kilometers per hour!
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