Proton irradiation environment of solar system objects in the heliospheric boundary regions

Details Proton irradiation environment of solar system objects in the heliospheric boundary regions Proton irradiation environment of solar system objects in the heliospheric boundary regions

Sep 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aipc..858..372c&link_type=abstract

PHYSICS OF THE INNER HELIOSHEATH: Voyager Observations, Theory, and Future Prospects; 5th Annual IGPP International Astrophysics

Astronomy and Astrophysics

Astrophysics

4

Interstellar Material, Heliosphere/Interstellar Medium Interactions, Heliopause And Solar Wind Termination, Composition, Energy Spectra And Interactions

Scientific paper

Two classes of outer solar system objects, Scattered Disk Objects and comets, include many known members that are natural counterparts of the Voyager 1 spacecraft now traversing the heliosheath enroute to the heliopause. Thirty-two Scattered Disk Objects and about ten times more comets, as cataloged by the Smithsonian Astrophysical Observatory's Minor Planets Center, have orbits passing partly or wholly through the heliosheath. Objects passing from the supersonic heliosphere, upstream of the solar wind termination shock, through the heliosheath and out into the local interstellar medium may undergo increasing surface irradiation intensities as suggested by Voyager 1 measurements and limits on interstellar proton flux spectra. Correspondingly, volume dosage rates for chemically significant surface irradiation at micron to meter depths could also increase with potential cumulative effects on surface composition, albedo, and atmospheric evolution of these objects.

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