Velocity filtration and temperature inversion in a system with long-range interactions
arXiv:1312.1614 · doi:10.1140/epjb/e2014-50136-y
Abstract
Temperature inversion due to velocity filtration, a mechanism originally proposed to explain the heating of the solar corona, is demonstrated to occur also in a simple paradigmatic model with long-range interactions, the Hamiltonian mean-field model. Using molecular dynamics simulations, we show that when the system settles into an inhomogeneous quasi-stationary state in which the velocity distribution has suprathermal tails, the temperature and density profiles are anticorrelated: denser parts of the system are colder than dilute ones. We argue that this may be a generic property of long-range interacting systems.
6 pages, 9 figures, epj macros
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- Coarse-grained collisionless dynamics with long-range interactions
- Temperature inversion in a confined plasma atmosphere: coarse-grained effect of temperature fluctuations at its base
- Anticorrelated temperature-density profiles in the quiet solar corona and coronal mass ejections: Approach based on the spin-type Hamiltonians