The interaction between the solar wind (SW) and the local interstellar medium (LISM) creates energetic neutral atoms (ENAs), mainly Hydrogen (H), at energies similar to ions in the SW. H ENAs are born from charge exchanges between SW protons and LISM H atoms. A large portion of measurable primary ENAs are born in the inner heliosheath (IHS), where the heated and condensed SW plasma has a large thermal component to direct ENAs back toward 1 AU. Secondary ENAs, however, require secondary charge exchanges before being detected at 1 AU. Primary ENAs born in the supersonic and subsonic SW may exit the HP, charge exchange into pick-up ions (PUIs), and charge exchange again to become secondary ENAs. Recent IBEX observations show a ribbon of flux dominating the entire sky. It is possible that the IBEX ribbon is created through secondary charge exchange processes. In this paper we present a numerical code that calculates primary and secondary H ENA fluxes by integrating along ENA trajectories. We will provide descriptions of the code and preliminary results.
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20 November 2012
SPACE WEATHER: THE SPACE RADIATION ENVIRONMENT: 11th Annual International Astrophysics Conference
19–23 March 2012
Palm Springs, CA, USA
Research Article|
November 20 2012
Numerical simulations of primary and secondary hydrogen ENA fluxes at 1 AU
Eric Zirnstein;
Eric Zirnstein
Center for Space Plasma and Aeronomic Research (CSPAR), The University of Alabama in Huntsville, Huntsville, AL 35899 and Department of Physics, The University of Alabama in Huntsville, Huntsville, AL 35899,
USA
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Jacob Heerikhuisen;
Jacob Heerikhuisen
Center for Space Plasma and Aeronomic Research (CSPAR), The University of Alabama in Huntsville, Huntsville, AL 35899 and Department of Physics, The University of Alabama in Huntsville, Huntsville, AL 35899,
USA
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Nikolai Pogorelov
Nikolai Pogorelov
Center for Space Plasma and Aeronomic Research (CSPAR), The University of Alabama in Huntsville, Huntsville, AL 35899 and Department of Physics, The University of Alabama in Huntsville, Huntsville, AL 35899,
USA
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AIP Conf. Proc. 1500, 262–267 (2012)
Citation
Eric Zirnstein, Jacob Heerikhuisen, Nikolai Pogorelov; Numerical simulations of primary and secondary hydrogen ENA fluxes at 1 AU. AIP Conf. Proc. 20 November 2012; 1500 (1): 262–267. https://doi.org/10.1063/1.4768776
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