The enormous velocities of the so called hypervelocity stars (HVSs) derive,
likely, from close interactions with massive black holes, binary stars
encounters or supernova explosions. In this paper, we investigate the origin of
hypervelocity stars as consequence of the close interaction between the Milky
Way central massive black hole and a passing-by young stellar cluster. We found
that both single and binary HVSs may be generated in a burst-like event, as the
cluster passes near the orbital pericentre. High velocity stars will move close
to the initial cluster orbital plane and in the direction of the cluster
orbital motion at the pericentre. The binary fraction of these HVS jets depends
on the primordial binary fraction in the young cluster. The level of initial
mass segregation determines the value of the average mass of the ejected stars.
Some binary stars will merge, continuing their travel across and out of the
Galaxy as blue stragglers.Comment: 11 pages, 10 figures, 1 Table, accepted for publication in MNRA
