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High-energy galactic cosmic rays in the magnetospheres of terrestrial exoplanets

hal.structure.identifierLaboratoire de Physique et Chimie de l'Environnement et de l'Espace [LPC2E]
dc.contributor.authorGRIESSMEIER, Jean-Mathias
hal.structure.identifierSchool of Engineering and Science [Bremen] [JU-SES]
dc.contributor.authorSTADELMANN, A.
hal.structure.identifierZentrum für Astronomie und Astrophysik [Berlin] [ZAA]
dc.contributor.authorGRENFELL, J. L.
dc.contributor.authorPATZER, A. B. C.
hal.structure.identifierSSE 2012
dc.contributor.authorVON PARIS, P.
hal.structure.identifierSpace Research Institute of Austrian Academy of Sciences [IWF]
dc.contributor.authorLAMMER, H.
dc.date.issued2012-09
dc.date.conference2012
dc.description.abstractEnTheoretical arguments indicate that close-in terrestial exoplanets may have weak magnetic fields, especially in the case of planets more massive than Earth ("super- Earths"). Planetary magnetic fields, however, constitute one of the shielding layers which protect the planet against cosmic ray particles. In particular, a weak magnetic field results in a high particle flux to the top of the planetary atmosphere. For the case of cosmic ray protons, we numerically analyze the propagation of the particles through planetary magnetospheres. We evaluate the efficiency of magnetospheric shielding as a function of the particle energy (in the range 64 MeV ≤ E ≤ 500 GeV) and of the planetary magnetic field strength (in the range 0.05ME ≤M≤ 3ME). In order to illustrate possible effects of weak magnetic fields, we show the dependency of the penetration energy on the planetary magnetic field strength. We discuss implications of increased particle fluxes, including the modification of atmospheric chemistry, destruction of atmospheric biomarker molecules, and potential biological implications.
dc.language.isoen
dc.title.enHigh-energy galactic cosmic rays in the magnetospheres of terrestrial exoplanets
dc.typeCommunication dans un congrès
dc.subject.halPlanète et Univers [physics]/Astrophysique [astro-ph]/Planétologie et astrophysique de la terre [astro-ph.EP]
dc.subject.halPhysique [physics]/Astrophysique [astro-ph]/Planétologie et astrophysique de la terre [astro-ph.EP]
bordeaux.page628
bordeaux.conference.title-
bordeaux.countryES
bordeaux.conference.cityMadrid
bordeaux.peerReviewedoui
hal.identifierhal-00832669
hal.version1
hal.invitednon
hal.proceedingsoui
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00832669v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.date=2012-09&rft.spage=628&rft.epage=628&rft.au=GRIESSMEIER,%20Jean-Mathias&STADELMANN,%20A.&GRENFELL,%20J.%20L.&PATZER,%20A.%20B.%20C.&VON%20PARIS,%20P.&rft.genre=unknown


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