| Resonant Heating of Ions by Parallel Propagating Alfvén Waves in Solar Coronal Holes |
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| 作者姓名： | Tian-Xi Zhang Jing-Xiu Wang and Chi-Jie Xiao National Astronomical Observatories Chinese Academy of Sciences Beijing Center for Space Plasma and Aeronomic Research The University of Alabama in Huntsville Huntsville AL USA |
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| 作者单位： | Tian-Xi Zhang，Jing-Xiu Wang and Chi-Jie Xiao National Astronomical Observatories，Chinese Academy of Sciences，Beijing 100012; Center for Space Plasma and Aeronomic Research，The University of Alabama in Huntsville，Huntsville，AL 35899，USA; |
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| 基金项目： | Supported by the National Natural Science Foundation of China. |
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| 摘 要： | Resonant heating of H, O+5, and Mg+9 by parallel propagating ion cyclotron Alfven waves in solar coronal holes at a heliocentric distance is studied using the heating rate derived from the quasilinear theory. It is shown that the particle-AlfVen-wave interaction is a significant microscopic process. The temperatures of the ions are rapidly increased up to the observed order in only microseconds, which implies that simply inserting the quasilinear heating rate into the fluid/MHD energy equation to calculate the radial dependence of ion temperatures may cause errors as the time scales do not match. Different species ions are heated by Alfven waves with a power law spectrum in approximately a mass order. To heat O+5 over Mg+9 as measured by the Ultraviolet Coronagraph Spectrometer (UVCS) in the solar coronal hole at a region ≥1.9.R, the energy density of Alfven waves with a frequency close to the O+5-cyclotron frequency must be at least double of that at the Mg+9-cyclotron frequency. With an appropriate wa
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Resonant Heating of Ions by Parallel Propagating Alfven Waves in Solar Coronal Holes |
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| Tian-Xi Zhang,Jing-Xiu Wang and Chi-Jie Xiao National Astronomical Observatories,Chinese Academy of Sciences,Beijing , Center for Space Plasma and Aeronomic Research,The University of Alabama in Huntsville,Huntsville,AL ,USA,.Resonant Heating of Ions by Parallel Propagating Alfven Waves in Solar Coronal Holes[J].Chinese Journal of Astronomy and Astrophysics,2005(3). |
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| Authors: | Tian-Xi Zhang Jing-Xiu Wang and Chi-Jie Xiao National Astronomical Observatories Chinese Academy of Sciences Beijing Center for Space Plasma and Aeronomic Research The University of Alabama in Huntsville Huntsville AL USA |
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| Institution: | Tian-Xi Zhang,Jing-Xiu Wang and Chi-Jie Xiao National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100012, Center for Space Plasma and Aeronomic Research,The University of Alabama in Huntsville,Huntsville,AL 35899,USA, |
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| Abstract: | |
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| Keywords: | acceleration of particles - plasmas - waves - solar wind - Sun: corona |
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