Hostname: page-component-8448b6f56d-sxzjt Total loading time: 0 Render date: 2024-04-23T08:22:11.104Z Has data issue: false hasContentIssue false
  • English
  • Français

Stellar X-ray and Radio Activities and Coronal Magnetic Field

Published online by Cambridge University Press:  30 March 2016

Yutaka Uchida
Yutaka Uchida*
Affiliation:
Tokyo Astronomical Observatory, University of Tokyo

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Activities due to the magnetic effects in the stellar atmospheres are discussed with a special emphasis on the enhanced X-rays and radio activities in RS CVn binaries. Enhanced activities in these close binary systems are proposed to be due to an enhanced production of the twist of the subphotospheric magnetic flux tubes by the large differential rotation in radius, created between the inertially rotating core and more or less synchronously rotating envelope. The magnetic twist of the emerged flux tubes in the “active-longitude-belt” will be dynamically released into inter-star flux tubes together with the driven-out mass heated in the events of magnetic reconnections which are mediated by the magnetic fields of the companion star.

Type
Joint Discussions
Information
Highlights of Astronomy , Volume 7: Highlights of Astronomy. As presented at the XIXth General Assembly of the IAU, 1985 , 1986 , pp. 461 - 465
Copyright
Copyright © Reidel 1986

References

Altschuler, M.D., and Newkirk, G., 1969, Solar Phys., 4, 131.Google Scholar
Feldman, P.A., 1985, private communications.Google Scholar
Priest, E.R., 1981, Solar Flare Magnetohydrodynamics (Gordon and Breach), p 139.CrossRefGoogle Scholar
Sakurai, T., 1982, Solar Phys., 76, 301.Google Scholar
Sakurai, T., and Uchida, Y., 1977, Solar Phys., 52, 397.Google Scholar
Schatten, K.H., Wilcox, J.M., and Ness, N.F., 1969, Solar Phys., 6, 442.Google Scholar
Schmidt, H.U., 1964, in Physics of Solar Flare, ed. Hess, W.N., (NASA), p 107.Google Scholar
Sheeley, N.R., Bohlin, J.D., Brueckner, G.E., Purcell, J.D., Scherrer, V. and Tousey, R., 1974, Solar Phys., 40, 103.Google Scholar
Uchida, Y., 1985, presented at Joint Commission 10 + 11 Meeting, IAU General Assembly, New Delhi.Google Scholar
Uchida, Y. and Sakurai, T., 1984, in Activity of Red Dwarf Stars, eds. Byrne, P.B. and Rodono, M. (Reidel, D.), p629.Google Scholar
Uchida, Y. and Sakurai, T., 1985, in Unstable Current Systems and Plasma Instabilities in Astrophysics, eds. Kundu, M.R. and Holman, G. (Reidel, D.) p287.Google Scholar
Uchida, Y. Sakurai, T., and Shibata, K., 1986, in preparation.Google Scholar
Vaiana, G.S., Krieger, A.S., and Timothy, A.F., 1973, Solar Phys., 32, 81.Google Scholar
Yoshimura, H.,1976, Solar Phys., 50, 3.Google Scholar