Skip to main content
Log in

OSO-7 results on coronal emission near 304 Å

  • Published:
Solar Physics Aims and scope Submit manuscript

Abstract

The spectral composition and spatial distribution of equatorial coronal emission near 304 Å is examined. Spectral scans indicate that the predominant line is from Si xi. Comparisons of observations with calculations of intensity changes with altitude indicate that collisional excitation is important near the Sun but that photoexcitation becomes dominant beyond about 1.3 R from the solar center. Observed and calculated intensities are in approximate agreement for abundances and electron densities that are within the range of observed values.

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

Access this article

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

  • Allen, C. W.: 1973, Astrophysical Quantities, 3rd ed., Univ. of London, The Athlone Press, p. 176.

  • Behring, W. E.: 1974, private communication.

  • de Boer, K. S., Olthof, H., and Pottasch, S. R.: 1972, Astron. Astrophys. 16, 417.

    Google Scholar 

  • Chapman, R. D. and Neupert, W. M.: 1974, J. Geophys. Res. 79, 4138.

    Google Scholar 

  • Doschek, G. A., Behring, W. E., and Feldman, U.: 1974, Astrophys. J. Letters 190, L141.

    Google Scholar 

  • Feldman, U. and Behring, W. E.: 1974, Astrophys. J. Letters 189, L45.

    Google Scholar 

  • Freeman, F. F. and Jones, B. B.: 1970, Solar Phys. 15, 288.

    Google Scholar 

  • Gabriel, A. H.: 1971, Solar Phys. 21, 392.

    Google Scholar 

  • Hall, L. A. and Hinteregger, H. E.: 1970, J. Geophys. Res. 75, 6959.

    Google Scholar 

  • Heroux, L., Cohen, M., and Higgins, J. E.: 1974, J. Geophys. Res. 79, 5237.

    Google Scholar 

  • Jordan, C.: 1969, Monthly Notices Roy. Astron. Soc. 142, 501.

    Google Scholar 

  • Lotz, W.: 1967, Astrophys. J. Suppl. 14, 207.

    Google Scholar 

  • Malinovsky, M. and Heroux, L.: 1973, Astrophys. J. 181, 1009.

    Google Scholar 

  • Nakada, M. P., Chapman, R. D., Neupert, W. M., and Thomas, R. J.: 1975, Solar Phys. 42, 487.

    Google Scholar 

  • Neupert, W. M., Chapman, R. D., and Thomas, R. J.: 1974, Solar Phys. 34, 349.

    Google Scholar 

  • Newkirk, G. Jr.: 1967, Ann. Rev. Astron. Astrophys. 5, 213.

    Google Scholar 

  • Seaton, M. J.: 1959, Monthly Notices Roy. Astron. Soc. 119, 81.

    Google Scholar 

  • Smith, M. W. and Wiese, W. L.: 1971, Astrophys. J. Suppl. 23, 103.

    Google Scholar 

  • Tousey, R. and Koomen, M. J.: 1971, Solar Phys. 21, 401.

    Google Scholar 

  • Tousey, R., Austin, W. E., Purcell, J. D., and Widing, K. G.: 1965, Ann. Astrophys. 4, 755.

    Google Scholar 

  • Tousey, R., Bartoe, J.-D. F., Bohlin, J. D., Brueckner, G. E., Purcell, J. D., Scherrer, V. E., Sheeley Jr., N. R., Schumacher, R. J., and Vanhoosier, M. E.: 1973, Solar Phys. 33, 265.

    Google Scholar 

  • Underwood, J. H. and Neupert, W. M.: 1974, Solar Phys. 35, 241.

    Google Scholar 

  • Van Regemorter, H.: 1962, Astrophys. J. 136, 906.

    Google Scholar 

  • Violett, T. and Rense, W. A.: 1959, Astrophys. J. 130, 954.

    Google Scholar 

  • Withbroe, G. L.: 1970, Solar Phys. 11, 42.

    Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Rights and permissions

Reprints and permissions

About this article

Cite this article

Nakada, M.P., Chapman, R.D., Neupert, W.M. et al. OSO-7 results on coronal emission near 304 Å. Sol Phys 43, 337–350 (1975). https://doi.org/10.1007/BF00152358

Download citation

  • Received:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF00152358

Keywords

Navigation