Hostname: page-component-cc8bf7c57-fxdwj Total loading time: 0 Render date: 2024-12-12T05:47:40.009Z Has data issue: false hasContentIssue false
  • English
  • Français

The spatial association of spots and plages

Published online by Cambridge University Press:  25 May 2016

C. J. Butler
C. J. Butler*
Affiliation:
Armagh Observatory College Hill, Armagh, BT61 9DG, N. Ireland

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.

We review the evidence, from rotational modulation, for association of plages and spots on active binaries. We find reasonably convincing support for such an association from IUE SWP observations of RS CVn stars, but little or no evidence from MgII line fluxes. There is a similar lack of evidence for BY Dra systems. The results can be interpreted as evidence for: (a) the presence of active longitudes which persist on some RS CVn stars for several years, (b) high filling factors in MgII emission and (c) lower filling factors, and therefore greater contrast, in SWP emission. There is a suggestion that the association between plages and spots is more clearly seen in longer period RS CVn stars than the very active, short period, systems favoured by IUE observers.

Type
Session IV: “Outer Atmospheric Structure”
Information
Symposium - International Astronomical Union , Volume 176: Stellar Surface Structure , 1996 , pp. 423 - 432
Copyright
Copyright © Kluwer 1996 

References

Andrews, A.D., Rodono, M., Linsky, J.L., Brown, A., Butler, C.J., Catalano, S., Scaltriti, F., Busso, M., Nha, Il-Seong, Oh, J.Y., Henry, M.C.D., Hopkins, J.L., Landis, H.J. and Engelbrekston, S. 1988, A&A 204, 177.Google Scholar
Baliunas, S.L. and Dupree, A.K. 1982, ApJ 252, 668.Google Scholar
Butler, C.J., Doyle, J.G., Andrews, A.D., Byrne, P.B., Linsky, J.L., Bornmann, P.L., Rodonó, M., Pazzani, V. and Simon, T. 1987, A&A 174, 139.Google Scholar
Butler, C.J., Doyle, J.G., Budding, E. and Foing, B. 1995, Proc. 4th MUSICOS Workshop , Huang, L., Zhai, D., Catala, C. and Foing, B. (eds), Beijing, June 1994, ESA, p 207.Google Scholar
Dorren, J.D. and Guinan, E.F. 1990, ApJ 348, 703.Google Scholar
Doyle, J.G. 1988, A&A 192, 281.Google Scholar
Doyle, J.G., Butler, C.J., Byrne, P.B., Rodonó, M., Swank, J. and Fowles, W. 1989, A&A 223, 219.Google Scholar
Kiepenhauer, K.O. 1953, The Solar System 1, The Sun , Kuiper, G.P. (ed), Chicago, p. 322.Google Scholar
Linsky, J.L., Bornmann, P.L., Carpenter, K.G., Wing, R.F., Giampapa, M.S., Worden, S.P. and Hege, E.K. 1982, ApJ 260, 670.Google Scholar
Losh, H.M. 1939, Pub. Zürich Obs. 2.Google Scholar
Neff, J.E., Pagano, I. and Rodonó, M. 1995, Proc. 4th MUSICOS Workshop , Huang, L., Zhai, D., Catala, C. and Foing, B. (eds), Beijing, June 1994, ESA, p. 157.Google Scholar
Olah, K. Hall, D.S. and Henry, G.W. 1991, A&A 251, 531.Google Scholar
Olah, K., Budding, E., Butler, C.J., Houdebine, E.R., Giminez, A. and Zeilik, M. 1992, MNRAS 259, 302.Google Scholar
Quin, D.A., Doyle, J.G., Butler, C.J., Byrne, P.B. and Swank, J.H. 1993, A&A 272, 477.Google Scholar
Rodono, M., Byrne, P.B., Neff, J.E., Linsky, J.L., Simon, T., Butler, C.J., Catalano, S. Cutispoto, G., Doyle, J.G. and Gibson, D.M. 1987, A&A 176, 267.Google Scholar
Wolfer, A. 1899, Pub. Obs. Univ. Michigan 7, 127.Google Scholar