Electron heat flow in the solar corona: Implications of non-Maxwellian velocity distributions, the solar gravitational field, and Coulomb collisions

Journal of Geophysical Research: Space Physics

Volumn 108, Issue A7, 2003, Pages

  Dorelli, John C ^a   Scudder, Jack D ^b  

^a LOS ALAMOS NATIONAL LABORATORY   (United States)

^b UNIVERSITY OF IOWA   (United States)

Author keywords

Electron heat flux; Fokker Planck equation; Kappa distribution; Nonequilibrium thermodynamics; Nonlocal heat flow; Solar corona

Indexed keywords

EID: 41749119410     PISSN: None     EISSN: 21699402     Source Type: Journal    
DOI: 10.1029/2002JA009484     Document Type: Article

References (16)

1. Albritton, J. R., E. A. Williams, I. B. Bernstein, and K. P. Swartz, Nonlocal electron heat. transport by not quite maxwell-boltzmann distributions, Phys. Rev. Lett., 57, 1887-1890, 1986.
2. Ames, W. F., Numerical Methods for Partial Differential Equations, Academic, San Diego, Calif., 1992.
3. Anderson, S. W., Coulomb collisions and coronal heating by velocity filtration, Astrophys. J., 437, 860-866, 1994.
4. Bell, A. R., R. G. Evans, and D. J. Nichols, Electron energy transport in steep temperature gradients in laser-produced plasmas, Phys. Rev. Lett., 46, 243-246, 1981.
5. Dorelli, J. C., and J. D. Scudder, Electron heat flow carried by kappa distributions in the solar corona, Geophys. Res. Lett., 26, 3547-3550, 1999.
6. Epperlein, E. M., Fokker-Planck modelling of electron transport in laser-produced plasmas, Laser Particle Beams, 12, 257-272, 1994.
7. Gray, D. R., and J. D. Kilkenny, The measurement of ion acoustic turbulence and reduced thermal conductivity caused by a large temperature gradient in a laser heated plasma, Plasma Phys., 22, 81-110, 1980.
8. Ko, Y.-K., L. A. Fisk, G. Gloeckler, and J. Geiss, Limitations on suprathermal tails of electrons in the lower corona, Geophys. Res. Lett., 23, 2785-2788, 1996.
9. Kupfer, K., R. W. Harvey, O. Sauter, M. J. Schaffer, and G. M. Staebler, Kinetic modeling of scrape-off layer plasmas, Phys. Plasmas, 3, 3644-3652, 1996.
10. Landi, S., and F. G. E. Pantellini, On the temperature profile and heat flux in the solar corona: Kinetic simulations, Astron. Astrophys., 372, 686-701, 2001.
11. Rosenbluth, M. N., W. M. MacDonald, and D. L. Judd, Fokker-Planck equation for an inverse-square force, Phys. Rev., 107, 1-6, 1957.
12. Scudder, J. D., Why all stars should possess circumstellar temperature inversions, Astrophys. J., 398, 319-349, 1992a.
13. Scudder, J. D., On the causes of temperature change in inhomogeneous low-density astrophysical plasmas, Astrophys. J., 398, 299-318, 1992b.
14. Scudder, J. D., and S. Olbert, A theory of local and global processes which affect solar wind electrons, 1, The origin of typical 1 AU velocity distribution functions: Steady state theory, J. Geophys. Res., 84, 2755-2772, 1979.
15. Scudder, J. D., and S. Olbert, The collapse of the local spitzer-härm formulation and a global-local generalization for heat flow in an inhomogeneous, fully-ionized plasma, in Solar Wind Five, edited by M. Neugebauer, NASA Conf. Publ., 2280, 163-181, 1983.
16. Spitzer, L., and R. Härm, Transport phenomena in a completely ionized gas, Phys. Rev., 89, 977-981, 1953.