Skip to main content
SpringerLink
Log in

MHD wave energy fluxes for late-type dwarfs

  • General Discussion: The Role of Magnetic Fields
  • Conference paper
  • First Online:
Cool Stars, Stellar Systems, and the Sun

Part of the book series: Lecture Notes in Physics ((LNP,volume 291))

Abstract

We calculate the efficiency of MHD wave generation by turbulent motions in the stratified stellar atmospheres of late-type main sequence stars, under the assumption that the embedded magnetic fields are uniform. In contradiction with previous results, we show that there is no significant increase in the efficiency of wave generation because of the presence of magnetic fields, at least within the theory's limits of applicability. Thus, we show that MHD energy fluxes for late-type stars whose surface magnetic fields are uniform are less than those obtained for acoustic waves in a magnetic field-free atmosphere, and do not vary enough for a given spectral type in order to explain observed UV and X-ray fluxes. Thus, our results show that MHD energy fluxes obtained if stellar surface magnetic fields are uniform cannot explain the observed stellar coronal emissions.

This is a preview of subscription content, log in via an institution to check access.

Access this chapter

Log in via an institution

Institutional subscriptions

Bibliography

  • Bohn, H. U. 1984, Astron. Ap., 136, 338.

    Google Scholar 

  • Kulsrud, R. M. 1955, Ap. J., 121, 461.

    Google Scholar 

  • Lighthill, M. J. 1952, Proc. Roy. Soc. London, A211, 564.

    Google Scholar 

  • Linsky, J. L. 1981, in X-ray Astronomy in the 1980's, ed. S. S. Holt (NASA TM-83848), p. 13.

    Google Scholar 

  • Musielak, Z. E., and Rosner, R. 1987a, Ap. J., 315, 371.

    Google Scholar 

  • Musielak, Z. E., and Rosner, R. 1987b, Ap. J., submitted.

    Google Scholar 

  • Musielak, Z. E., Rosner, R., and Ulmschneider, P. 1987, Ap. J., submitted.

    Google Scholar 

  • Paczynski, B. 1969, Acta Astr., 19, 1.

    Google Scholar 

  • Paczynski, B. 1984, private communication.

    Google Scholar 

  • Parker, E. N. 1964, Ap. J., 140, 1170.

    Google Scholar 

  • Renzini, A., Cacciari, C., Ulmschneider, P., and Schmitz, F. 1982, Astron. Ap., 61, 39.

    Google Scholar 

  • Rosner, R., Golub, L., and Vaiana, G. S. 1985, Ann. Rev. Astron. Ap., 23, 413.

    Google Scholar 

  • Stein, R. F. 1967, Solar Phys., 2, 385.

    Google Scholar 

  • Stein, R. F. 1981, Ap. J., 246, 966.

    Google Scholar 

  • Ulmschneider, P., and Stein, R. F. 1982, Astron. Ap., 106, 9.

    Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Harvard-Smithsonian Center for Astrophysics, USA

    R. Rosner

  2. Space Science Laboratory, NASA Marshall Space Flight Center, USA

    Z. E. Musielak

Authors
  1. R. Rosner
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Z. E. Musielak
    View author publications

    You can also search for this author in PubMed Google Scholar

Editor information

Jeffrey L. Linsky Robert E. Stencel

Rights and permissions

Reprints and permissions

Copyright information

© 1987 Springer-Verlag

About this paper

Cite this paper

Rosner, R., Musielak, Z.E. (1987). MHD wave energy fluxes for late-type dwarfs. In: Linsky, J.L., Stencel, R.E. (eds) Cool Stars, Stellar Systems, and the Sun. Lecture Notes in Physics, vol 291. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-18653-0_111

Download citation

  • DOI: https://doi.org/10.1007/3-540-18653-0_111

  • Published:

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-540-18653-3

  • Online ISBN: 978-3-540-48041-9

  • eBook Packages: Springer Book Archive

Publish with us

Policies and ethics

Search

Navigation