Oxygen and hydrogen ion abundance in the near-Earth magnetosphere: Statistical results on the response to the geomagnetic and solar wind activity conditions

التفاصيل البيبلوغرافية
العنوان: Oxygen and hydrogen ion abundance in the near-Earth magnetosphere: Statistical results on the response to the geomagnetic and solar wind activity conditions
المؤلفون: Kronberg, Elena A., Haaland, Stein E., Daly, Patrick W., Grigorenko, Elena E., Kistler, Lynn, Fränz, Markus, Dandouras, Iannis
سنة النشر: 2012
المجموعة: Astrophysics
Physics (Other)
مصطلحات موضوعية: Astrophysics - Earth and Planetary Astrophysics, Physics - Plasma Physics, Physics - Space Physics
الوصف: The composition of ions plays a crucial role for the fundamental plasma properties in the terrestrial magnetosphere. We investigate the oxygen-to-hydrogen ratio in the near-Earth magnetosphere from -10 RE274 keV O+ ion intensities, relative to the corresponding hydrogen intensities; (3) In contrast to ~10 keV ions, the >274 keV O+ ions show the strongest acceleration during growth phase and not during the expansion phase itself. This suggests a connection between the energy input to the magnetosphere and the effective energization of energetic ions during growth phase; (4) The ratio between quiet and disturbed times for the intensities of ion ionospheric outflow is similar to those observed in the near-Earth magnetosphere at >274 keV. Therefore, the increase of the energetic ion intensity during disturbed time is more likely due to the intensification than to the more effective acceleration of the ionospheric source. In conclusion, the energization process in the near-Earth magnetosphere is mass dependent and it is more effective for the heavier ions.
نوع الوثيقة: Working Paper
DOI: 10.1029/2012JA018071
URL الوصول: http://arxiv.org/abs/1210.4365
رقم الأكسشن: edsarx.1210.4365
قاعدة البيانات: arXiv