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We present new kinetic-gasdynamic model of the solar wind interaction withthe local interstellar medium. The model incorporates several processessuggested by McComas et al. (2009) for the origin of the heliospheric ENAribbon -- the most prominent feature seen in the all sky maps of heliosphericENAs discovered by the Interstellar Boundary Explorer (IBEX). The ribbon is aregion of enhanced fluxes of ENAs crossing almost the entire sky. Soon afterthe ribbon's discovery it was realized (McComas et al., 2009) that theenhancement of the fluxes could be in the directions where the radial componentof the interstellar magnetic field around the heliopause is close to zero(Schwadron et al., 2009). Our model includes secondary charge exchange of theinterstellar H atoms with the interstellar pickup protons outside theheliopause and is a further advancement of the kinetic-gasdynamic model byMalama et al. (2006) where pickup protons were treated as a separate kineticcomponent. Izmodenov et al. (2009) have shown in the frame of Malama's modelthat the interstellar pickup protons outside the heliopause maybe a significantsource of ENAs at energies above 1 keV. The difference between the current workand that of Izmodenov et al. (2009) is in the assumption of no-scattering fornewly created pickup protons outside the heliopause. In this limit the modelproduces a feature qualitatively similar to the ribbon observed by IBEX.

Scatter-free pickup ions beyond the heliopause as a model for the Interstellar Boundary Explorer (IBEX) ribbon