Jet interactions with a giant molecular cloud in the Galactic centre and
  ejection of hypervelocity stars
  The hypervelocity OB stars in the Milky Way Galaxy were ejected from the
central regions some 10-100 million years ago. We argue that these stars, {as
well as many more abundant bound OB stars in the innermost few parsecs,} were
generated by the interactions of an AGN jet from the central black hole with a
dense molecular cloud. Considerations of the associated energy and momentum
injection have broader implications for the possible origin of the Fermi
bubbles and for the enrichment of the intergalactic medium.
