  We investigate heliosheath energetic neutral atom (ENA) fluxes at keV
energies, by assuming that the heliosheath proton distribution can be
approximated by a kappa-distribution. The choice of the kappa parameter derives
from observational data of the solar wind (SW). This has direct applications to
the upcoming IBEX mission. We will look at all-sky ENA maps within the IBEX
energy range (10 eV to 6 keV), as well as ENA energy spectra in several
directions. We find that the use of kappa, as opposed to a Maxwellian, gives
rise to greatly increased ENA fluxes above 1 keV, while medium energy fluxes
are somewhat reduced. We show how IBEX data can be used to estimate the
spectral slope in the heliosheath, and that the use of kappa reduces the
differences between ENA maps at different energies. We also investigate the
effect introducing a kappa-distribution has on the global interaction between
the SW and the local interstellar medium (LISM), and find that there is
generally an increase in energy transport from the heliosphere into the LISM,
due to the modified profile of ENA's energies. This results in a termination
shock that moves out by 4 AU, a heliopause that moves in by 9 AU and a bow
shock 25 AU farther out, in the nose direction.
