Coronal proton transport in the presence of Alfven waves and implications for impact line linear polarization

Details Coronal proton transport in the presence of Alfven waves and implications for impact line linear polarization Coronal proton transport in the presence of Alfven waves and implications for impact line linear polarization

Aug 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...358..674s&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 358, Aug. 1, 1990, p. 674-679. Research supported by the Observatoire de Pa

Astronomy and Astrophysics

Astrophysics

9

Coronal Loops, H Alpha Line, Magnetohydrodynamic Waves, Particle Emission, Proton Scattering, Solar Protons, Linear Polarization, Proton Beams, Proton Density (Concentration), Solar Corona, Transport Properties, Wave Propagation

Scientific paper

The transport of fast (about 1 MeV) protons in the corona is considered when their density and ansiotropy are sufficiently large to excite Alfven waves. The Alfven waves scatter the protons and make them almost isotropic. The Alfven wave instability remains in a marginally stable state in which the proton anisotropy is just large enough to excite Alfven waves to a level which would eliminate any greater anisotropy. The protons propagate diffusively down a coronal loop and have a path length of order 100 times their length in the absence of Alfven waves. This increases their Coulomb losses, and much higher energy protons (2-20 MeV) are required initially to produce H-alpha impact line linear polarization in the chromosphere as compared to the case in the absence of Alfven waves (about 200 keV) for loop lengths about 10 to the 9th cm. The interpretation of the observed polarization becomes less direct because it depends on more poorly known parameters than in the case of the absence of Alfven waves.

Affiliated with

Also associated with

No associations

Rating

Coronal proton transport in the presence of Alfven waves and implications for impact line linear polarization 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 Coronal proton transport in the presence of Alfven waves and implications for impact line linear polarization, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Coronal proton transport in the presence of Alfven waves and implications for impact line linear polarization will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1125094