Skip to main content
Log in

Time delay between Hα and hard X-ray emissions during impulsive solar flares

  • Published:
Solar Physics Aims and scope Submit manuscript

Abstract

This investigation shows that statistically there are significant time delays between Hα and hard X-ray (HXR) emissions during solar flares; most impulsive flares produce HXR emissions up to ∼1 min before and up to 2 min after the onset of Hα emission. HXR emissions are also found to be peaked up to 2 min before the Hα emissions.

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.

Similar content being viewed by others

References

  • Bruzek, A.: 1967, in J. N. Xanthakis (ed.), Solar Physics, Interscience Publishers, London, p. 399.

    Google Scholar 

  • Dulk, G. A. and Dennis, B. R.: 1982, Astrophys. J. 260, 875.

    Google Scholar 

  • Hinotori Satellite Preliminary Solar Hard X-Ray Data: 1982 and 1983, I and II, Hinotori SXT/HXM Team, N. Shibuya, N. Nitta, and K. Ohki (eds.), Tokyo Astronomical Observatory, Mitaka, Tokyo, Japan.

  • Kampfer, N. and Magun, A.: 1983, Astrophys. J. 274, 910.

    Google Scholar 

  • Kane, S. R., Crannel, C. J., Datlowe, D., Feldman, V., Gabriel, A., Hudson, H. S., Kundu, M. R., Matzler, C., Neidig, D., Petrosian, V., and Sheeley, N. R.Jr.: 1980, in P. A. Sturrock (ed.), Solar Flares, Colorado Associated University Press, Colo., U.S.A., p. 187.

    Google Scholar 

  • Ramaty, R., Colgate, S. A., Dulk, G. A., Hoyng, P., Knight, J. W., Lin, R. P., Melrose, D. B., Orrall, F., Paizis, C., Shapiro, P. R., Smith, D. F., and Hollebeke, M. V.: 1980, in P. A. Sturrock (ed.), Solar Flares, Colorado Associated University Press, Colo., U.S.A., p. 117.

    Google Scholar 

  • Solar Geophysical Data: 1981–1984, Part I and II, U.S. Department of Commerce, Boulder, Colo., U.S.A.

  • Švestka, Z.: 1976, Solar Flares, D. Reidel Publ. Co., Dordrecht, Holland, p. 115.

    Google Scholar 

  • Swarup, G., Stone, P. H., and Maxwell, A.: 1960, Astrophys. J. 131, 725.

    Google Scholar 

  • Vorpahl, J.: 1972, Solar Phys. 26, 397.

    Google Scholar 

  • Vorpahl, J.: 1973, in G. Newkirk Jr. (ed.), ‘Coronal Disturbances’, IAU Symp. 57, 157.

  • Vorpahl, J. and Zirin, H.: 1970, Solar Phys. 11, 285.

    Google Scholar 

  • Zirin, H.: 1978, Solar Phys. 58, 95.

    Google Scholar 

  • Zirin, H., Pruss, G., and Vorpahl, J.: 1971, Solar Phys. 19, 463.

    Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Rights and permissions

Reprints and permissions

About this article

Cite this article

Verma, V.K., Pande, M.C. Time delay between Hα and hard X-ray emissions during impulsive solar flares. Sol Phys 97, 107–112 (1985). https://doi.org/10.1007/BF00152981

Download citation

  • Received:

  • Revised:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF00152981

Keywords

Navigation