Your PDF has successfully downloaded.

You may be interested in finding more content on these topics:


You are not currently logged in.

Access JSTOR through your library or other institution:


Log in through your institution.

Journal Article

Near‐Ultraviolet Spectra of Nine M Dwarf Stars, or a Second Effort to Find Optical Coronal Lines in M Dwarf Stars

George Wallerstein and Sudhi Tyagi
Publications of the Astronomical Society of the Pacific
Vol. 116, No. 820 (June 2004), pp. 554-557
DOI: 10.1086/420981
Stable URL:
Page Count: 4
Were these topics helpful?
See something inaccurate? Let us know!

Select the topics that are inaccurate.

  • Download PDF
  • Add to My Lists
  • Cite this Item
We're having trouble loading this content. Download PDF instead.

Page Thumbnails


ABSTRACT We have searched for optical coronal lines in the 3100–3700 Å region of eight M dwarf stars with rather low levels of activity. This brief survey supplements a similar search in 15 active stars published in 1991. No coronal lines could be identified. However, the emission spectra including lines of H i, He i, Ca ii, Ca i, Si i, and Fe i are described and illustrated. Radial velocities of the emission lines show no systematic differences from the stellar absorption lines. Coronae with temperatures similar to those in the solar corona seem to be rare among the M dwarfs, although at least one example has been found by Schmitt & Wichmann.

Notes and References

This item contains 12 references.

  • ['Bidelman, W. P., & Pyper, D. M. 1963, PASP, 75, 389']
  • ['Fuhrmeister, R., Schmitt, J. H. M. M., & Wichmann, B. 2004, A&A, 417, 701']
  • ['Gatewood, G., Coban, L., & Han, I. 2003, AJ, 125, 1530']
  • ['Joy, A. H., & Humason, M. L. 1941, PASP, 53, 296']
  • ['———. 1949, PASP, 61, 133']
  • ['Redfield, S., Ayres, T. R., Linsky, J. L., Ake, T. B., Dupree, A. K., Robinson, R. D., & Young, P. R. 2003, ApJ, 585, 993']
  • ['Reid, I. N., Gizis, J. E., & Hawley, S. L. 2002, AJ, 124, 2721']
  • ['Sanz‐Forcada, J., Brickhouse, N. S., & Dupree, A. K. 2003, ApJS, 145, 147']
  • ['Schmitt, J. H. M. M., & Wichmann, R. 2001, Nature, 412, 508']
  • ['Segransan, D., Delfosse, X., Forveillet, T., Beuzit, J.‐L., Udry, S., Pernier, C., & Mayor, M. 2000, A&A, 364, 665']
  • ['Wallerstein, G., Bohm, K.‐H., & Oke, J. B. 1991, in Extreme Ultraviolet Astronomy, ed. R. F. Malina & S. Bowyer (New York: Pergamon Press), 113']
  • ['Wilson, O. C. 1961, PASP, 73, 15']