Skip to main content
SpringerLink
Log in

Density and temperature determination of neutral hydrogen in coronal structures

  • Published:
Solar Physics Aims and scope Submit manuscript

Abstract

High-resolution filtergrams in Lα have been obtained with a rocket borne instrument and evidence several loop shaped structures which can be seen as absorption features over the solar surface. The optical thickness of these coronal structures is measured with respect to nearby unabsorbed disk features. Their shape and dimension being known from the images, the determination of the neutral hydrogen temperature and density is possible. It is found that temperatures below 105 K and densities of a few 104 hydrogen atoms cm−3 are compatible with the opacities observed in the structures.

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

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  • Bonnet, R. M., Lemaire, P., Vial, J. C., Artzner, G., Gouttebroze, P., Jouchoux, A., Leibacher, J. W., Skumanich, A., and Vidal-Madjar, A.: 1978, Astrophys. J. 221, 1032.

    Google Scholar 

  • Bonnet, R. M., Bruner, E. C., Acton, L. W., Brown, W. A., and Decaudin, M.: 1980, Astrophys. J. 237, L47.

    Google Scholar 

  • Foukal, P. V.: 1981, Preprint, The C i Opacity and Physical Structure of Cool Very Dense Plasma in the Solar Corona'.

  • Gabriel, A., Garton, W.R. S., Goldberg, L., Jones, T. J. L., Jordan, C., Morgan, F. J., Nicholls, R. W., Parkinson, W. J., Paxton, H. J. B., Reeves, E. M., Shenton, C. B., Speer, R. J., and Wilson, R.: 1971, Astrophys. J. 169, 595.

    Google Scholar 

  • Lemaire, P., Gouttebroze, P., Vial, J. C., and Artzner, G. E.: 1981, Astron. Astrophys. (in press).

  • Rosner, R., Tucker, W. H., and Vaiana, G. S.: 1978, Astrophys. J. 220, 643.

    Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Laboratoire de Physique Stellaire et Planétaire, B.P. 10, 91370, Verrières-le-Buisson, France

    R. M. Bonnet

  2. Athens National Observatory, Astronomy Institute, 306, Athens, Greece

    G. Tsiropoula

Authors
  1. R. M. Bonnet
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. G. Tsiropoula
    View author publications

    You can also search for this author in PubMed Google Scholar

Rights and permissions

Reprints and permissions

About this article

Cite this article

Bonnet, R.M., Tsiropoula, G. Density and temperature determination of neutral hydrogen in coronal structures. Sol Phys 75, 139–143 (1982). https://doi.org/10.1007/BF00153467

Download citation

  • Received:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF00153467

Keywords

Search

Navigation