In general, the atypical high velocity of some stars in the Galaxy can only
be explained by invoking acceleration mechanisms related to extreme
astrophysical events in the Milky Way. Using astrometric data from Gaia and the
photometric information in 12 filters of the S-PLUS, we performed a kinematic,
dynamical, and chemical analysis of 64 stars with galactocentric velocities
higher than 400 kms−1. All the stars are gravitationally bound
to the Galaxy and exhibit halo kinematics. Some of the stars could be remnants
of structures such as the Sequoia and the Gaia-Sausage/Enceladus. Supported by
orbital and chemical analysis, we identified Gaia DR3 5401875170994688896 as a
star likely to be originated at the centre of the Galaxy. Application of a
machine learning technique to the S-PLUS photometric data allows us to obtain
very good estimates of magnesium abundances for this sample of high velocity
stars