Coulomb collisions and coronal heating by velocity filtration

Details Coulomb collisions and coronal heating by velocity filtration Coulomb collisions and coronal heating by velocity filtration

Dec 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apj...437..860a&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 437, no. 2, p. 860-866

Astronomy and Astrophysics

Astrophysics

17

Astronomical Models, Collision Parameters, Coulomb Collisions, Electric Potential, Electron Distribution, Solar Corona, Thermodynamics, Velocity Distribution, Boltzmann-Vlasov Equation, Boundary Value Problems, Particle Size Distribution, Solar Atmosphere, Space Plasmas, Thermodynamic Properties, Velocity

Scientific paper

We introduce the effects of Coulomb collisions to the velocity filtration model of coronal heating, which has so far been done collisionlessly. Non-Maxwellian particle distributions are at the heart of this model, so collisions, which force such distributions to relax, can play a critical role. We consider a column of plasma extending upwards from the bottom of the corona and use typical transition zone densities and temperatures as well as the non-Maxwellian kappa distribution previously used in this model. We demonstrate the collisions are an important factor by comparing electron density and energy profiles predicted by the collisionless Vlasov equation to ones made using the assumption that collisions are a small, first-order perturbation. For the heights considered (below 0.5 solar radius), these collisional corrections are of order unity or larger. We conclude that the velocity filtration model needs to be redone including collisions self-consistently.

Affiliated with

Also associated with

No associations

Rating

Coulomb collisions and coronal heating by velocity filtration 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 Coulomb collisions and coronal heating by velocity filtration, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Coulomb collisions and coronal heating by velocity filtration will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1326927