Dynamical Evidence of a Solitonic Core of $10^{9}M_\odot$ in the Milky
  Way
  A wavelike solution for the non-relativistic universal dark matter (wave-DM)
is rapidly gaining interest, following distinctive predictions of pioneering
simulations of cosmic structure as an interference pattern of coherently
oscillating bosons. A prominent solitonic standing wave is predicted at the
center of every galaxy, representing the ground state, that has been identified
with the wide, kpc scale dark cores of common dwarf-spheroidal galaxies,
providing a boson mass of, $\simeq 10^{-22}$ eV. A denser soliton is predicted
for Milky Way sized galaxies where momentum is higher, so the de Broglie scale
of the soliton is smaller, $\simeq 100$ pc, of mass $\simeq 10^9 M_\odot$. Here
we show the central motion of bulge stars in the Milky Way implies the presence
of such a dark core, where the velocity dispersion rises inversely with radius
to a maximum of $\simeq 130$ km/s, corresponding to an excess central mass of
$\simeq 1.5\times 10^9 M_\odot$ within $\simeq 100$ pc, favouring a boson mass
of $\simeq 10^{-22}$ eV. This quantitative agreement with such a unique and
distinctive prediction is therefore strong evidence for a light bosonic
solution to the long standing Dark Matter puzzle, such as the axions generic in
String Theory.
