The properties of 0.11 keV–344 MeV ion spectra in the inner heliosheath using regularized<i>κ</i>-distributions

Context. The shape of the ion energy spectra plays a critical role in determining energetics, acceleration mechanisms, and possible sources different plasma suprathermal populations. determination exact total particle spectrum provides necessary means to address inner heliosheath dynamics. Apart from various modelling efforts, direct fit measured for an extended range ∼0.11–344 MeV has not been performed date. Aims. We use set combined 0.11–55 keV remotely sensed energetic neutral atoms (ENA) measurements Interstellar Boundary Explorer (IBEX-Lo IBEX-Hi) Cassini/Ion Neutral Camera (INCA), converted protons, together with ∼28 keV–344 situ low-energy charged (LECP) cosmic ray subsystem (CRS) experiments on Voyager 2, over declining phase solar cycle 23 (SC23) ascending 24 (SC24) study characteristics spectrum. Methods. fitted 0.11 composite regularized isotropic κ -distribution functions (RKDs), which allowed us determine macroscopic physical properties. Results. demonstrate that 2009–2012 corresponds SC23 is well by three RKDs, while 2013–2016 spectrum, associated rise SC24, can only be approximated six functions. Conclusions. Our results are generally consistent shock accelerated particles undergo additional inside heliosheath. identify transmitted population particles, reflected very-high-energy component modulated galactic rays. time period most likely mixture need employ RDKs.