The 135 classical novae discovered in M87 appear to be strongly concentrated along the galaxy's jet

 Conclusion according to the Q-FFF Theory: the GABH (Galaxy Anchor Black Hole- and the resulting jet-Sructure) of M87, is more simple  (more linear) than most Galaxies have.

The Milky Way and Andromeda seem to show a more complex jet structure and resulting Fermi bubble structure.

A 9-Month Hubble Space Telescope Near-UV Survey of M87. II. A Strongly Enhanced Nova Rate near the Jet of M87 https://arxiv.org/abs/2309.16856

https://arxiv.org/pdf/2309.16856.pdf

Q-FFF says: The more simple vacuum structure around the central jets of a galaxy, could be related to the increase of Super Nova explosions and most star formation at te end of the jet..

See the Herbig Haro structure effects, for the solar system. Micro Fermi Bubbles (red) are expected between the SABHs and the sun.

Below:  the Milky Way and Andromeda seem to show a more complex jet structure and resulting  Fermi bubble structure.

Below:  the nicely aligned Galaxy Jet of M87.

More complex jets expected in Centaurus A.