Abstract
Coronal plumes are believed to be essentially magnetic features: they are rooted in magnetic flux concentrations at the photosphere and are observed to extend nearly radially above coronal holes out to at least 15 solar radii, probably tracing the open field lines. The formation of plumes itself seems to be due to the presence of reconnecting magnetic field lines and this is probably the cause of the observed extremely low values of the Ne/Mg abundance ratio.
In the inner corona, where the magnetic force is dominant, steady MHD models of coronal plumes deal essentially with quasi-potential magnetic fields but further out, where the gas pressure starts to be important, total pressure balance across the boundary of these dense structures must be considered.
In this paper, the expansion of plumes into the fast polar wind is studied by using a thin flux tube model with two interacting components, plume and interplume. Preliminary results are compared with both remote sensing and solar wind in situ observations and the possible connection between coronal plumes with pressure-balance structures (PBS) and microstreams is discussed.
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References
Ahmad, I.A. and Withbroe, G.L.: 1977, Sol. Phys. 53, 397.
Antiochos, S.K.: 1994, Adv. Space Res. 14,(4) 139.
Arge, C.N. and Mullan, D.J.: 1997, BAAS, SPD meeting 29, 2.40.
Casalbuoni, S., Del Zanna, L., Habbal, S.R., and Velli, M.: 1998, ApJ, in preparation.
Corti, G., Poletto, G., Kohl, J.L., and Noci, G.: 1997, in Proc. Fifth SoHO Workshop, ESA SP-404.
DeForest, C.E., et al.: 1997, Sol. Phys. 175, 393.
Del Zanna, L., Hood, A.W., and Longbottom, A.W.: 1997, A&A 318, 963.
Del Zanna, L., Hood, A.W., Velli, M., and von Steiger, R.: 1998, in Proc. Solar Jets and Coronal Plumes, Guadeloupe, ESA SP-421, in press.
Esser, R., Habbal, S.R., Coles, W.A., and Hollweg, J.V.: 1997, JGR 102, 7063.
Fisher, R. and Guhathakurta, M.: 1995, ApJ 447, L139.
Grall, R.R., et al.: 1996, Nature 379, 429.
Habbal, S.R., Esser, R., Guhathakurta, M., and Fisher R.: 1995, GRL 22, 1465.
Hu, Y.Q., Esser, R., and Habbal, S.R.: 1997, JGR 102, 14,661.
Kohl, J.L., Strachan, L., and Gardner, L.D.: 1996, ApJ 465, L141.
Kohl, J.L., et al.: 1997, Sol. Phys. 175, 613.
McComas, D.J., et al.: 1996, A&A 316, 368.
McKenzie, J.F., Banaszkiewicz, M., and Axford, W.I.: 1995, A&A 303, L45.
McKenzie, J.F., Axford, W.I., and Banaszkiewicz, M.: 1997, GRL 24, 2877.
Meyer, J.-P.: 1993, in Origin and Evolution of the Elements, Cambridge Univ. Press, p. 26.
Neugebauer, M., et al.: 1995, JGR 100, 23,389.
Parker, E.: 1964, ApJ 139, 690.
Poletto, G., et al.: 1996, A&A 316, 374.
Sheeley, N.R., Jr.: 1996, ApJ 469, 423.
von Steiger, R. and Geiss, J.: 1989, A&A 225, 222.
von Steiger, R.: 1996, in Solar Wind Eight, AIP 382, Woodbury, NY, p. 193.
von Steiger, R., Geiss, J., and Gloeckler, G.: 1997, in Cosmic Winds and the Heliosphere, J.R. Jokipii, C.P. Sonett, A.S. Giampapa (eds.), Tucson: University of Arizona Press, p. 581.
Strachan, L., Kohl, J.L., Weiser, H., and Withbroe, G.L.: 1993, ApJ 412, 410.
Thieme, K.M., Marsch, E., and Schwenn, R.: 1990, Ann. Geophys. 8, 713.
Velli, M., Habbal, S.R., and Esser, R.: 1994, Space Sci. Rev. 70, 391.
Wang, Y.-M.: 1994, ApJ 435, L153.
Wang, Y.-M. and Sheeley, N.R.: 1995, ApJ 452, 457.
Wang, Y.-M., et al.: 1997, ApJ 484, L75.
Widing, K.G. and Feldman, U.: 1992, ApJ 392, 715.
Wilhelm, K., et al.: 1998, ApJ, in press.
Woo, R. and Habbal, S.R.: 1997, GRL 24, 1159.
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Del Zanna, L., Von Steiger, R. & Velli, M. The Expansion of Coronal Plumes in the Fast Solar Wind. Space Science Reviews 85, 349–356 (1998). https://doi.org/10.1023/A:1005127206950
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DOI: https://doi.org/10.1023/A:1005127206950