Evidence for an accreting massive black hole in He 2-10 from adaptive
  optics integral field spectroscopy
  Henize 2-10 is a blue dwarf galaxy with intense star formation and one the
most intriguing question about it is whether or not it hosts an
accretingmassive black hole. We use H and K-band integral field spectra of the
inner 130 pc$\times$130 pc of He 2-10 to investigate the emission and
kinematics of the gas at unprecedented spatial resolution. The observations
were done using the Gemini Near-Infrared Integral Field Spectrograph (NIFS)
operating with the ALTAIR adaptive optics module and the resulting spatial
resolutions are 6.5 pc and 8.6 pc in the K and H bands, respectively. Most of
the line emission is due to excitation of the gas by photo-ionization and
shocks produced by the star forming regions. In addition, our data provide
evidence of emission of gas excited by an active galactic nucleus located at
the position of the radio and X-ray sources, as revealed by the analysis of the
emission-line ratios. The emission lines from the ionized gas in the field
present two kinematic components: one narrow with a velocity field suggesting a
disk rotation and a broad component due to winds from the star forming regions.
The molecular gas shows only the narrow component. The stellar velocity
dispersion map presents an enhancement of about 7 km s$^{-1}$ at the position
of the black hole, consistent with a mass of $1.5^{+1.3}_{-1.3}\times10^6$
M$_\odot$.
