Zhang Tianxi; Wang Jingxiu; Xiaol Chijie
Source Publicationchinesejournalofastronomyandastrophysics
AbstractResonant heating of H, O^+5, and Mg^+9 by parallel propagating ioncyclotron Alfvén 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-Allyén-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 Alfvén 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 ≥ 1.9R⊙, the energy density of Alfvén 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 wave-energy spectrum, the heating of H, O^+5 and Mg^+9 can be consistent with the UVCS measurements in solar coronal holes at a heliocentric distance.
Document Type期刊论文
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Zhang Tianxi,Wang Jingxiu,Xiaol Chijie. resonantheatingofionsbyparallelpropagatingalfvnwavesinsolarcoronalholes[J]. chinesejournalofastronomyandastrophysics,2005,005(003):285.
APA Zhang Tianxi,Wang Jingxiu,&Xiaol Chijie.(2005).resonantheatingofionsbyparallelpropagatingalfvnwavesinsolarcoronalholes.chinesejournalofastronomyandastrophysics,005(003),285.
MLA Zhang Tianxi,et al."resonantheatingofionsbyparallelpropagatingalfvnwavesinsolarcoronalholes".chinesejournalofastronomyandastrophysics 005.003(2005):285.
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