Physics – Plasma Physics
Scientific paper
Jun 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004jgra..10906202d&link_type=abstract
Journal of Geophysical Research, Volume 109, Issue A6, CiteID A06202
Physics
Plasma Physics
8
Magnetospheric Physics: Plasmasphere, Magnetospheric Physics: Magnetosphere-Inner, Magnetospheric Physics: Mhd Waves And Instabilities, Magnetospheric Physics: Numerical Modeling, Space Plasma Physics: Experimental And Mathematical Techniques
Scientific paper
Measurements of electric and magnetic field taken by instruments on the Combined Release and Radiation Effects Satellite (CRRES) spacecraft on 29 July 1991 reveal seven or eight toroidal Alfvén wave frequency bands. By using observations of the waves near the magnetic equator and the symmetry of the theoretical modes as a function of magnetic latitude, we can identify which theoretical Alfvén wave harmonic corresponds to a particular frequency band. This, along with the L shell frequency dependence, gives convincing evidence that we are in fact observing the toroidal Alfvén mode. Because the harmonics of the toroidal Alfvén wave have a different response to mass density at different points along a magnetic field line, the frequencies of these harmonics can be used to infer the distribution of mass density along the field line. While there is a significant uncertainty in the results due to the uncertainty in the observed frequencies, it is nevertheless true that both the solution based on the peak (mean) frequencies and the majority of solutions using a Monte Carlo simulation of the effects of uncertainty in frequency show the same result, that there is a local maximum in ρ within about 30° of the magnetic equator. A similar result is found for the wave event observed on 28 August 1990, a local maximum in ρ within about 15° of the magnetic equator. These results imply that heavy ions are preferentially concentrated at the magnetic equator.
Anderson Roger R.
Denton Richard E.
Takahashi Kazue
Wuest Martin P.
No associations
LandOfFree
Magnetospheric toroidal Alfvén wave harmonics and the field line distribution of mass density does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Magnetospheric toroidal Alfvén wave harmonics and the field line distribution of mass density, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetospheric toroidal Alfvén wave harmonics and the field line distribution of mass density will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-854514