Hostname: page-component-cd9895bd7-8ctnn Total loading time: 0 Render date: 2024-12-26T03:54:08.706Z Has data issue: false hasContentIssue false
  • English
  • Français

Infrared Measurements of Stellar Magnetic Fields

Published online by Cambridge University Press:  03 August 2017

Steven H. Saar
Steven H. Saar*
Affiliation:
Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, U.S.A.

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.

I review the advantages, techniques, and results of measurement of magnetic fields on cool stars in the infrared (IR). These measurements have generated several important results, including the following: the first data on the magnetic parameters of dMe and RS CVn variables; evidence for field strength confinement by photospheric gas pressure; support for the correlation between magnetic flux and rotation, with possible saturation at high rotation rates; indications of horizontal and/or vertical magnetic field structure; and evidence of spatial variations in B over a stellar surface. I discuss these results in detail, and suggest future directions for IR magnetic field research.

Keywords

infrared: starsline: formationstars: activitystars: magnetic fields
Type
Part 5: Magnetic Fields and Infrared Magnetometry
Information
Symposium - International Astronomical Union , Volume 154: Infrared Solar Physics , 1994 , pp. 437 - 447
Copyright
Copyright © Kluwer 1994 

References

Basri, G.S., Marcy, G.W., Valenti, J.: 1992, Astrophys. J. 390, 622.CrossRefGoogle Scholar
Basri, G.S., Marcy, G.W., Valenti, J.: 1990, Astrophys. J. 360, 650.Google Scholar
Basri, G.S., Marcy, G.W.: 1988, Astrophys. J. 330, 274.CrossRefGoogle Scholar
Bookbinder, J.A., Walter, F.W., Brown, A.: 1992, in Giampapa, M. and Bookbinder, J. (eds.), Cool Stars, Stellar Systems, and the Sun, ASP Conf. Ser. 26, p. 27.Google Scholar
Deming, D., Boyle, R.J., Jennings, D.E., Wiedemann, G.: 1988, Astrophys. J. 333, 978.Google Scholar
Doyle, J.G., Byrne, P.B., Butler, C.J.: 1986, Astron. Astrophys. 156, 283.Google Scholar
Giampapa, M.S. 1985, Astrophys. J. 299, 781.CrossRefGoogle Scholar
Giampapa, M.S., Worden, S.P.: 1982, in Stenflo, J.O. (ed.), Solar and Stellar Magnetic Fields: Origins and Coronal Effects, Reidel, Dordrecht, p. 29.Google Scholar
Giampapa, M.S., Golub, L., Worden, S.P.: 1983, Astrophys. J. (Letters) 268, 121.Google Scholar
Gondoin, Ph., Giampapa, M.S., Bookbinder, J.A.: 1985, Astrophys. J. 297, 710.CrossRefGoogle Scholar
Gray, D.F.: 1984, Astrophys. J. 277, 640.CrossRefGoogle Scholar
Grossmann-Doerth, U., Solanki, S.K.: 1990, Astron. Astrophys. 238, 279.Google Scholar
Hall, D.: 1973, An Atlas of IR Spectra of the Solar Photosphere and Umbrae, Kitt Peak National Observatory, Tucson, Arizona.Google Scholar
Hall, D.N.B., Ridgway, S., Bell, E.A., Yarborough, J.M. 1979, S.P.I.E., 172, 121.Google Scholar
Jordan, C.J.: 1991, in Ulmschneider, P., Priest, E.R. and Rosner, R. (eds.), Mechanisms of Chromospheric and Coronal Heating, Springer, Berlin, p. 300.Google Scholar
Jennings, D.E., Deming, D., Wiedemann, G., Keady, J.J.: 1986, Astrophys. J. (Letters) 310, L39.Google Scholar
Leroy, J.L.: 1962, Ann. d' Ap., 25, 127.Google Scholar
MacGregor, K.B., Brenner, M.: 1991, Astrophys. J. 376, 204.Google Scholar
Marcy, G.W., Basri, G.S.: 1989, Astrophys. J. 345, 480.CrossRefGoogle Scholar
Marcy, G.W., Bruning, D.H.: 1984, Astrophys. J. 281, 286.Google Scholar
Mullan, D.J.: 1974, Astrophys. J. 279, 746.Google Scholar
Mullan, D.J.: 1975, Astron. Astrophys. 40, 41.Google Scholar
Pettersen, B.R.: 1990, in Miroyan, L.V., Pettersen, B. R., and Tsvetkov, M. K. (eds.), Flare Stars in Star Clusters, Associations, and the Solar Vicinity, Kluwer, Dordrecht, p. 49.Google Scholar
Robinson, R.D.: 1980, Astrophys. J. 239, 961.Google Scholar
Robinson, R.D., Worden, S.P., Harvey, J.W.: 1980, Astrophys. J. (Letters) 236, L155.CrossRefGoogle Scholar
Saar, S.H.: 1992a, in Giampapa, M. and Bookbinder, J. (eds.), Cool Stars, Stellar Systems, and the Sun, ASP Conf. Ser. 26, p. 252.Google Scholar
Saar, S.H.: 1993, these proceedings.Google Scholar
Saar, S.H.: 1991, in Tuominen, I., Moss, D., and Rüdiger, G. (eds.), The Sun and Cool Stars: Activity, Magnetism, Dynamos, Springer, Berlin, p. 389.Google Scholar
Saar, S.H.: 1990, in Stenflo, J.O. (ed.), The Solar Photosphere: Structure, Convection, and Magnetic Fields, Kluwer, Dordrecht, p. 427.Google Scholar
Saar, S.H.: 1988a, Astrophys. J. 324, 441.Google Scholar
Saar, S.H.: 1988b, in Pallavicini, R. (ed.), Hot Thin Plasmas in Astrophysics, Kluwer, Dordrecht, p. 139.Google Scholar
Saar, S.H., Bookbinder, J.A., Neff, J., Bromage, G., Bastian, T.: 1991, Bull. Amer. Astron. Soc. 23, 1383.Google Scholar
Saar, S.H., Golub, L., Bopp, B.W., Herbst, W., Huovelin, J.: 1990, in Rolfe, E. (ed.), Evolution in Astrophysics, ESA SP-130, p. 431.Google Scholar
Saar, S.H., Linsky, J.L., Giampapa, M.S.: 1987, in Delbouille, L. and Monfils, A. (eds.), 27th Liège Astrophys. Colloq., U. de Liège, Liège, p. 103.Google Scholar
Saar, S.H., Linsky, J.L.: 1985, Astrophys. J. (Letters) 299, L47.Google Scholar
Saar, S.H., Linsky, J.L.: 1986, Advances in Space Physics, 6, No. 8, 235.Google Scholar
Saar, S.H., Schrijver, C.J.: 1987, in Linsky, J. and Stencel, R.E. (eds.), Cool Stars, Stellar Systems, and the Sun, Springer, New York, p. 38.Google Scholar
Saar, S.H., Solanki, S.K.: 1992, in Giampapa, M. and Bookbinder, J. (eds.), Cool Stars, Stellar Systems, and the Sun, ASP Conf. Ser. 26, p. 259.Google Scholar
Schrijver, C.J.: 1990, Astron. Astrophys. 234, 315.Google Scholar
Schrijver, C.J.: 1991, in Ulmschneider, P., Priest, E. R. and Rosner, R. (eds.), Mechanisms of Chromospheric and Coronal Heating, Springer, Berlin, p. 257.Google Scholar
Schrijver, C.J., Coté, J., Zwaan, C., Saar, S.H.: 1989, Astrophys. J. 337, 964.Google Scholar
Shakhovskaya, N.I.: 1989, Solar Phys. 121, 375.Google Scholar
Solanki, S.K.: 1993, these proceedings.Google Scholar
Solanki, S.K., Biémont, E., Mürset, U.: 1990, Astron. Astrophys. Suppl. 83, 307.Google Scholar
Solanki, S.K., Steiner, O.: 1990, Astron. Astrophys. 234, 519.Google Scholar
Strassmeier, K.G., Hall, D. S., Zeilik, M., Nelson, E., Eker, Z., and Fekel, F. C.: 1988, Astron. Astrophys. Suppl. 72, 291.Google Scholar
Sun, W.-H., Giampapa, M.S., Worden, S.P.: 1987 Astrophys. J. 312, 930.CrossRefGoogle Scholar
Unno, W.: 1956, Pub. Astron. Soc. Japan 8, 108.Google Scholar