Abstract
Estimates of the fluxes of energetic neutral atoms (ENA) in the distant heliosphere are calculated taking into account all important interactions between solar wind plasmas and neutral gases in the heliosphere. Effects of charge-exchange, double charge-exchange (for helium component), electron impact ionization, photoionization, recombination in thermal and non-thermal plasmas are calculated for various conditions over the solar cycle. The resulting neutral beams of energetic atoms emerging from the heliosphere may carry into the local interstellar medium (LISM) up to % 0.1-0.3 of the total solar wind energy, depending mainly on the location of the termination shock (“small” or “large” heliosphere), spatial direction and rather weakly on adopted plasma and gas parameters (densities, temperatures). The free energy thus transferred to LISM may significantly affect the state of the interstellar plasma in the immediate vicinity of the heliosphere.
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