scholarly journals Alfvén wave propagation and ion cyclotron interactions in the expanding solar wind: One-dimensional hybrid simulations

2001 ◽  
Vol 106 (A12) ◽  
pp. 29261-29281 ◽  
Author(s):  
Paulett C. Liewer ◽  
Marco Velli ◽  
Bruce E. Goldstein
Keyword(s):  
Solar Wind ◽  
Wave Propagation ◽  
Alfven Wave ◽  
One Dimensional ◽  
Ion Cyclotron ◽  
Hybrid Simulations

scholarly journals One-dimensional hybrid simulations of obliquely propagating ion cyclotron waves: Application to ion pickup at Io

2007 ◽  
Vol 112 (A6) ◽  
pp. n/a-n/a ◽  
Author(s):  
M. M. Cowee ◽  
C. T. Russell ◽  
R. J. Strangeway ◽  
X. Blanco-Cano
Keyword(s):  
One Dimensional ◽  
Ion Cyclotron Waves ◽  
Ion Cyclotron ◽  
Hybrid Simulations

Nonlinear Alfven Wave Propagation in the Solar Wind

1996 ◽  
Vol 465 ◽  
pp. 451 ◽  
Author(s):  
Y.-T. Lau ◽  
E. Siregar
Keyword(s):  
Solar Wind ◽  
Wave Propagation ◽  
Alfven Wave

scholarly journals Solar off-limb line widths with SUMER: revised value of the non-thermal velocity and new results

2009 ◽  
Vol 27 (9) ◽  
pp. 3551-3558 ◽  
Author(s):  
L. Dolla ◽  
J. Solomon
Keyword(s):  
Solar Wind ◽  
Cyclotron Resonance ◽  
Alfven Waves ◽  
Stray Light ◽  
Alfven Wave ◽  
Alfvén Waves ◽  
Thermal Velocity ◽  
Line Profiles ◽  
Lower Corona ◽  
Ion Cyclotron

Abstract. Alfvén waves and ion-cyclotron absorption of high-frequency waves are frequently brought into models devoted to coronal heating and fast solar-wind acceleration. Signatures of ion-cyclotron resonance have already been observed in situ in the solar wind and in the upper corona. In the lower corona, one can use the line profiles to infer the ion temperatures. But the value of the so-called "non-thermal" (or "unresolved") velocity, potentially related to the amplitude of Alfvén waves propagating in the corona, is critical in firmly identifying ion-cyclotron preferential heating. In a previous paper, we proposed a method to constrain both the Alfvén wave amplitude and the preferential heating, above a polar coronal hole observed with the SUMER/SOHO spectrometer. Taking into account the effect of instrumental stray light before analysing the line profiles, we ruled out any direct evidence of damping of the Alfvén waves and showed that ions with the lowest charge-to-mass ratios were preferentially heated. We re-analyse these data here to correct the derived non-thermal velocity, and we discuss the consequences on the main results. We also include a measure of the Fe VIII 1442.56 Å line width (second order), thus extending the charge-to-mass ratio domain towards ions more likely to experience cyclotron resonance.

scholarly journals Compressional Alfvén Wave Propagation Below Ion Cyclotron Frequency

1968 ◽  
Vol 21 (2) ◽  
pp. 129 ◽  
Author(s):  
RC Cross ◽  
JA Lehane
Keyword(s):  
Wave Propagation ◽  
Cyclotron Resonance ◽  
Cyclotron Frequency ◽  
Cutoff Frequency ◽  
Compressional Wave ◽  
Alfven Wave ◽  
Alfvén Waves ◽  
Ion Cyclotron Resonance ◽  
Wave Measurements ◽  
Ion Cyclotron

When the compressional wave cutoff frequency is below ion cyclotron frequency both compressional and torsional Alfven waves may be present simultaneously. Oompressional wave measurements in this regime are particularly important because of their relevance to certain ion cyclotron resonance heating experiments. This paper extends the work of others in this important regime.

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