Hostname: page-component-586b7cd67f-tf8b9 Total loading time: 0 Render date: 2024-11-29T09:39:34.590Z Has data issue: false hasContentIssue false
  • English
  • Français

Stellar plages

Published online by Cambridge University Press:  25 May 2016

F. M. Walter
F. M. Walter*
Affiliation:
State University of New York Stony Brook NY 11794-2100 USA

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.

The solar surface contains of bright regions (plages) and dark regions (sunspots) superposed on the photosphere. If the solar analogy is valid, then active late-type stars should also exhibit bright, spatially distinct plages. These plages can be detected by rotational modulation of chromospheric flux, or by Doppler imaging in chromospheric/transition region lines. I review the evidence for the existence of plages, with particular emphasis on two very active systems: AR Lacertae, for which we have sequences of Doppler imaging observations since 1984, and AB Doradus, which we observed extensively in 1994. I conclude that we need to be cautious when relying on the solar analogy to interpret observations of the most active late-type stars.

Type
Session IV: “Outer Atmospheric Structure”
Information
Symposium - International Astronomical Union , Volume 176: Stellar Surface Structure , 1996 , pp. 355 - 369
Copyright
Copyright © Kluwer 1996 

References

Acton, L.W. (1995) in Cool Stars, Stellar Systems, and the Sun , ed. Pallavicini, R., ASP Conf. series, in press.Google Scholar
Baliunas, S.L. & Vaughan, A.H. (1985) ARA&A , 23, 379.Google Scholar
Baliunas, S.L. et al. (1983) ApJ , 275, 752.Google Scholar
Baliunas, S.L. et al. (1995) ApJ , 438, 269.Google Scholar
Caillault, J.-P. & Helfand, D. J. (1985) ApJ , 289, 279.Google Scholar
Collier-Cameron, A. (1982) MNRAS , 200, 489.Google Scholar
Collier-Cameron, A., Duncan, D.K., Ehrenfreund, P., Foing, B.H., Kuntz, K.D., Penston, M.V., Robinson, R.D., & Soderblom, D.R. (1990) MNRAS , 247, 415.Google Scholar
Collier-Cameron, A. & Robinson, R.D. (1989) MNRAS , 238, 657.Google Scholar
Collier-Cameron, A. & Unruh, Y.C. (1994) MNRAS , 269, 814.Google Scholar
Dempsey, R.C., Linsky, J.L., Schmitt, J.H.M.M., & Fleming, T.A. (1992) ApJ , 413, 333.Google Scholar
Donahue, R.A., Baliunas, S.L., Soon, W.H., & McMillan, F.M. (1995) in Poster Proceedings: Stellar Surface Structure , ed. Strassmeier, K.G., p. 72.Google Scholar
Guirado, (1995), presented at Radio Emission from the Sun and Stars. .Google Scholar
Guinan, E.F., & Carroll, S.M. (1990) in Active Close Binaries , ed Ibanoglu, C., p 7.Google Scholar
Gurman, J.B. (1992) in The Sun, A Laboratory for Astrophysics , eds. Schmelz, J.T. & Brown, J.C. (Kluwer:Dorderecht) p. 245.CrossRefGoogle Scholar
Hall, J.C. & Ramsey, L.W. (1994) AJ , 107, 1149.CrossRefGoogle Scholar
Hubl, B.J. & Strassmeier, K.G. (1995) in Poster Proceedings: Stellar Surface Structure , ed. Strassmeier, K.G., p. 96.Google Scholar
Heuenemoerder, D.P., Buzasi, D.L., & Ramsey, L.W. (1989) AJ , 98, 1398.CrossRefGoogle Scholar
Heuenemoerder, D.P., Ramsey, L.W., & Buzasi, D.L. (1990) ApJ , 350, 763.Google Scholar
Innis, J.L., Thompson, K., & Coates, D.W. (1986) MNRAS , 223, 183.Google Scholar
Joncour, I., Bertout, C., & Bouvier, J. (1994) A&A , 291, L19.Google Scholar
Lanza, A.F., Pagano, I., Rodono, M., & Catalano, S. (1995) in Poster Proceedings: Stellar Surface Structure , ed. Strassmeier, K.G., p. 75.Google Scholar
Lim, J., Nelson, G.J., Castro, C., Kilkenny, D., & vanWyk, F. (1992) ApJ , 388, L27.Google Scholar
Linsky, J.L. (1980) ARAA , 18, 439.Google Scholar
Linsky, J.L., Wood, B., Brown, A., Giampapa, M., & Ambruster, C. (1995) ApJ , in press.Google Scholar
Maggio, A., Sciortino, S., Vaiana, G.S., Majer, P., Golub, L., Bookbinder, J., Harnden, R.F. Jr., & Rosner, R. 1987 ApJ , 315, 687.Google Scholar
Majer, P., et al. (1986) ApJ , 300, 360.Google Scholar
Neff, J.E. (1991) Memorie Della Società Astronomica Italiana , 62, 291.Google Scholar
Neff, J.E., Walter, F.M., Rodono, M., & Linsky, J.L. (1989) A&A , 215, 79.Google Scholar
Oranje, B.J. (1983) A&A , 124, 43.Google Scholar
Pallavicini, R., Golub, L., Rosner, R., Vaiana, G.S., Ayres, T., & Linsky, J.L. (1981) ApJ , 248, 279.Google Scholar
Pakull, M.W. (1981) A&A , 104, 33.Google Scholar
Pagano, I., Rodonò, M., & Neff, J.E. (1992a) in Surface Inhomogeneities in Late-Type Stars , eds. Byrne, P.B. & Mullan, D.J., (Springer-Verlag:Berlin), p. 315.Google Scholar
Pagano, I., Rodonò, M., & Neff, J.E. (1992b) in Cool Stars, Stellar Systems, and the Sun , ASP Conf. Series 26, eds. Giampapa, M.S. & Bookbinder, J.A. (ASP:San Francisco), p. 352.Google Scholar
Pagano, I., Rodonò, M., Neff, J.E., & Walter, F.M. (1994) in Cool Stars, Stellar Systems, and the Sun , ASP Conf. Series 64, ed. Caillault, J.-P. (ASP:San Francisco), p. 450.Google Scholar
Pagano, I., Rodonò, M., Neff, J.E., & Walter, F.M. (1995) in IAU Colloquium 153, Magnetodynamic Phenomena in the Solar Atmosphere – Prototypes of Stellar Activity , eds. Uchida, Y., Kosugi, T., & Hudson, H.S. (Kluwer:Dordrecht), in press.Google Scholar
Robinson, R.D. & Collier-Cameron, A. (1986) PASA , 6, 308.Google Scholar
Rucinski, S.M. (1983) A&AS , 52, 281.Google Scholar
Rucinski, S.M., Garrison, R.F., & Duffey, B. (1995) IBVS , 4156, 1.Google Scholar
Rutten, R.G.M. (1986) A&A , 159, 291.Google Scholar
Schrijver, C.J. (1988) A&A , 189, 163.Google Scholar
Schrijver, C.J. (1995) A&A Rev , 6, 181.Google Scholar
Schüssler, M. & Solanki, S.K. 1992, A&A , 264, L13.Google Scholar
Shcherbakov, A.G., Fernandez-Figueroa, M.J., Martin-Parra, F., de Castro, E., Cornide, M., Tuominen, I., & Ilyin, I.V. (1995) in Poster Proceedings: Stellar Surface Structure , ed. Strassmeier, K.G., p. 181.Google Scholar
Slee, O.B., Nelson, G.J., Innis, J.L., Stewart, R.T., Vaughan, A., & Wright, A.E. (1986) PASA , 6, 312.Google Scholar
Skumanich, A., Lean, J.L., White, O.R., & Livingston, W.C. (1984) ApJ , 282, 776.CrossRefGoogle Scholar
Skumanich, A., Smythe, C., & Frazier, E.N. (1975) ApJ , 200, 747.Google Scholar
Stauffer, J.R., Caillault, J.-P., Gagne, M., Prosser, C.F., & Hartmann, L.W. (1994) ApJS , 91, 625.Google Scholar
Strassmeier, K.G., Welty, A.D., & Rice, J.B. (1994) A&A , 285, L17.Google Scholar
Title, A.M., Topka, K.P., Tarbell, T.D., Schmidt, W., Balke, C., & Scharmer, G. (1992) ApJ , 393, 782.Google Scholar
Vaughan, A.H., Baliunas, S.L., Middlekoop, F., Hartmann, L.W., Mihalas, D., Noyes, R.W., & Preston, G.W. (1981) ApJ , 250, 276.Google Scholar
Vaughan, A.H. & Preston, G.W. (1980) PASP , 92, 385.CrossRefGoogle Scholar
Vilhu, O., Gustafsson, B., & Walter, F.M. (1991) A&A , 241, 167.Google Scholar
Vogt, S.S., Penrod, G.D., & Hatzes, A.P. (1987) ApJ , 321, 496.Google Scholar
Vogt, S.S. & Penrod, G.D. (1983) PASP , 95, 565.Google Scholar
Walter, F.M. (1995) in Astrophysics in the EUV , IAU Colloquium 152, eds. Malina, R. & Bowyer, S., in press.Google Scholar
Walter, F.M. & Bowyer, S. (1981) ApJ , 245, 671.Google Scholar
Walter, F.M., Matthews, L.D., & Linsky, J.L. (1995) ApJ , 447, 353.Google Scholar
Walter, F.M., Neff, J.E., Gibson, D.M., Linsky, J.L., Rodonò, M. Gary, D.E., & Butler, C.J. (1987) A&A , 186, 241.Google Scholar
Walter, F.M., Neff, J.E., Pagano, I., & Rodonò, M. (1993) in UV and X-Ray Spectroscopy of Laboratory and Astrophysical Plasmas , eds, Silver, E. & Kahn, S. M. (Cambridge: Cambridge), p. 403.Google Scholar
White, N.E., Shafer, R.A., Horne, K., Parmar, A.N., & Culhane, J.L. (1990) ApJ , 350, 776.Google Scholar
White, N.E., et al. (1994) PASJ , 46, L97.Google Scholar
White, O.R. & Livingston, W.C. (1981) ApJ , 249, 798.Google Scholar
Wilson, O.C. (1972) in Stellar Chromospheres , NASA SP-317, eds. Jordan, S.D. & Avrett, E.H., p. 305.Google Scholar
Wilson, O.C. (1978) ApJ , 226, 379.Google Scholar
Zirin, H. (1988) Astrophysics of the Sun (Cambridge:Cambridge).Google Scholar