Chromospheres, Activity and Magnetic Fields

  • Yu. N. Gnedin
Conference paper
Part of the International Astronomical Union / Union Astronomique Internationale book series (IAUS, volume 189)


This brief review presents the current state of observations of stellar activity effects including the fluxes of chromospheric emission lines: CaII H+K, MgII h+k, SiII 1812 Å multiplet, CIV, as well as radio and X-ray fluxes versus B-V colours and luminosity classes, rotation periods, Rossby number and especially versus the mean magnetic flux density 〈f B〉. Results of stellar magnetic field measurements are presented.


Rotation Period Stellar System Stellar Atmosphere Rossby Number Cool Star 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. Ayres T.R. et al. 1993, ApJSGoogle Scholar
  2. Basri G.S. 1987, ApJ, 316, 377ADSCrossRefGoogle Scholar
  3. Bouvier J. 1990, AJ, 99, 946ADSCrossRefGoogle Scholar
  4. Giampapa M.S. 1987,in Cool Stars, Stellar Systems and the Sun, eds. J.L. Linsky & R.E. Stencel (Berlin: Springer -Verlag), p.236CrossRefGoogle Scholar
  5. Gnedin Yu.N., Red’kina N.P. 1984, Sov.Astron. Lett., 10, 255ADSGoogle Scholar
  6. Gnedin Yu.N., Silant’ev N.A. 1984, Ap&SS, 102, 375ADSCrossRefGoogle Scholar
  7. Haish B., Bowyer S. & Malina R., 1994, 8th Cambridge Workshop on Cool Stars, Stellar Systems and the Sun, ed. by Caillault, ASP Conf. Ser., p.3.Google Scholar
  8. Johns-Krull Ch.M. & Valenti J.A. 1996, ApJ, 450, L95ADSGoogle Scholar
  9. Kemp J.C., Henson G.D., Krauss D.J., Dunaway M.K. 1985, Bull. Am. Astron. Soc., 19, 752Google Scholar
  10. Kim Y-C & Demarque P. 1996, ApJ, 457, 340ADSCrossRefGoogle Scholar
  11. Linsky J.L. & Saar S.H. 1987, in Cool Stars, Stellar Systems and the Sun, eds. J.L. Linsky and R.E. Stencel (Berlin: Springer -Verlag), p.44CrossRefGoogle Scholar
  12. Maheswarand M. & Cassinelli J.P. 1988, ApJ, 335, 931ADSCrossRefGoogle Scholar
  13. Marcy G.M. 1984, ApJ, 276, 286ADSCrossRefGoogle Scholar
  14. Michaud G. f Proffitt C.R. 1993,in Proc. IAU Colloq. 137, Inside the Stars, eds. A. Baglin and W.W. Weiss (San Francisco: ASP), 246Google Scholar
  15. Nadeau R., Bastien P. 1986, ApJ, 305, L5ADSCrossRefGoogle Scholar
  16. Saar S.H. 1987,in Cool Stars, Stellar Systems and the Sun, eds. J.L. Linsky and R.E. Stencel (Berlin: Springer -Verlag), p.10CrossRefGoogle Scholar
  17. Saar S.H. 1988, ApJ, 276, 286Google Scholar
  18. Schrijver C.J., Cote J., Zwaan C., Saar S.H. 1988, ApJ., 337, 964ADSCrossRefGoogle Scholar
  19. Seaquist E.R. 1995, Rep.Progr.Phys., 3 Google Scholar
  20. Skumanich A., Smythe G., Frazier E.W. 1975, ApJ., 200, 747ADSCrossRefGoogle Scholar
  21. Underhill A.B. 1984, ApJ, 276, 583ADSCrossRefGoogle Scholar
  22. Vilhu O. & Moss D. 1986, AJ, 92, 1178ADSCrossRefGoogle Scholar
  23. Vilhu O. & Walter F.M. 1987, ApJ, 321, 958ADSCrossRefGoogle Scholar
  24. White R.L. 1985, ApJ, 289, 698ADSCrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media Dordrecht 1997

Authors and Affiliations

  • Yu. N. Gnedin
    • 1
  1. 1.The Central Astronomical Observatory at PulkovoSt.PetersburgRussia

Personalised recommendations