Hostname: page-component-586b7cd67f-t8hqh Total loading time: 0 Render date: 2024-11-28T22:32:21.905Z Has data issue: false hasContentIssue false
  • English
  • Français

New Infrared Measurements of Magnetic Fields on Cool Stars

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 present a preliminary analysis of IR spectra of five K and M dwarfs and two RS CVn variables. Evidence for significant magnetic flux is found on several stars, a number of which are detected for the first time. Field strengths (B) on the RS CVn variables are lower than in the active dwarfs, consistent with the concept of pressure balance limiting B in stellar photospheres. I compare the results with previous measurements.

Keywords

infrared: starsstars: activitystars: late-typestars: magnetic fields
Type
Part 5: Magnetic Fields and Infrared Magnetometry
Information
Symposium - International Astronomical Union , Volume 154: Infrared Solar Physics , 1994 , pp. 493 - 497
Copyright
Copyright © Kluwer 1994 

References

Basri, G.S., Marcy, G.W., Valenti, J.: 1992, Astrophys. J. 390, 622.Google Scholar
Basri, G.S., Marcy, G.W., Valenti, J.: 1990, Astrophys. J. 360, 650.Google Scholar
Basri, G.S.: 1987, Astrophys. J. 316, 377.Google Scholar
Bopp, B.W., Saar, S.H., Ambruster, C., Feldman, P., Dempsey, R., Allen, M., Barden, S.P.: 1989, Astrophys. J. 339, 1059.Google Scholar
Galloway, D.J., Weiss, N.O. 1981, Astrophys. J. 243, 945.Google Scholar
Giampapa, M.S. 1985, Astrophys. J. 299, 781.CrossRefGoogle Scholar
Giampapa, M.S., Golub, L., Worden, S.P.: 1983, Astrophys. J. (Letters) 268, 121.Google Scholar
Hall, D.N.B., Ridgway, S., Bell, E.A., Yarborough, J.M. 1979, S.P.I.E., 172, 121.Google Scholar
Kurucz, R., Peytremann, E.: 1975, A Table of Semiempirical gf Values, SAO Rep. 362.Google Scholar
Leroy, J.L.: 1962, Ann. d' Ap., 25, 127.Google Scholar
Marcy, G.W., Bruning, D.H.: 1984, Astrophys. J. 281, 286.Google Scholar
Saar, S.H.: 1992a, in Cool Stars, Stellar Systems, and the Sun, Giampapa, M. and Bookbinder, J. (eds.), ASP Conf. Ser. 26, p. 252.Google Scholar
Saar, S.H.: 1993, these proceedings.Google Scholar
Saar, S.H.: 1991, in The Sun and Cool Stars: Activity, Magnetism, Dynamos, Tuominen, I. et al. (eds.), Springer, Berlin, p. 389.Google Scholar
Saar, S.H.: 1990, in The Solar Photosphere: Structure, Convection, and Magnetic Fields, Stenflo, J. O. (ed.), Kluwer, Dordrecht, p. 427.Google Scholar
Saar, S.H., Golub, L., Bopp, B.W., Herbst, W., Huovelin, J.: 1990, in Evolution in Astrophysics, Rolfe, E. (ed.), ESA SP-130, p. 431.Google Scholar
Saar, S.H., Linsky, J.L., Giampapa, M.S.: 1987, in 27th Liège Astrophys. Colloq., Delbouille, L. and Monfils, A. (eds.), 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., Piskunov, N.E., Tuominen, I.: 1992, in Cool Stars, Stellar Systems, and the Sun, Giampapa, M. and Bookbinder, J. (eds.), ASP Conf. Ser. 26, p. 255.Google Scholar
Stepień, K.: 1989, Astron. Astrophys. 210, 273.Google Scholar
Strassmeier, K.G., et al.: 1988, Astron. Astrophys. Suppl. 72, 291.Google Scholar
Unno, W.: 1956, Pub. Astron. Soc. Japan 8, 108.Google Scholar
Vogt, S.S., Soderblom, D.R., Penrod, G.D.: 1983, Astrophys. J. 269, 250.Google Scholar