Temporal and Spatial Variations of Heliospheric X-Ray Emissions Associated with Charge Transfer of the Solar Wind with Interstellar Neutrals

Details Temporal and Spatial Variations of Heliospheric X-Ray Emissions Associated with Charge Transfer of the Solar Wind with Interstellar Neutrals Temporal and Spatial Variations of Heliospheric X-Ray Emissions Associated with Charge Transfer of the Solar Wind with Interstellar Neutrals

Sep 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aipc..679..815r&link_type=abstract

SOLAR WIND TEN: Proceedings of the Tenth International Solar Wind Conference. AIP Conference Proceedings, Volume 679, pp. 815-8

Computer Science

Particle Emission, Solar Wind, Solar Wind Plasma, Sources Of Solar Wind

Scientific paper

X-rays should be generated throughout the heliosphere as a consequence of charge transfer collisions between heavy solar wind ions and interstellar neutrals. The high charge state solar wind ions resulting from these collisions are left in highly excited states and emit extreme ultraviolet or soft X-ray photons. X-rays should also be generated because of charge transfer collisions with neutral hydrogen in the Earth's geocorona. Originally a simple model was developed in which both the solar wind and the interstellar neutrals were assumed to be spherically symmetric and time independent. In our updated results, the hot model of Fahr [1] was used to model spatial variations of interstellar helium and hydrogen. At the same time a simple model was created to simulate X-ray radiation due to the Earth's geocorona. With the updated information, time independent maps of the heliospheric X-ray emission across the sky were created. Measured time histories of the solar wind proton flux were used in this updated model and the results were compared with ``long term enhancements'' in the soft X-ray background measured by the Röentgen satellite (ROSAT) for the same time period.

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