Skip to main content
Log in

A correlation between the emission of white light and cosmic radiation by a solar flare

  • Published:
Il Nuovo Cimento (1955-1965)

Summary

It is pointed out that the majority of the solar flares which were observed to produce increases in the terrestrial cosmic ray intensity were also observed in white light. This is interpreted as evidence that it is only the most energetic flares which produce any appreciable quantity of cosmic radiation, and that the rarity of the cosmic ray flare effect is, at least in part, due to the rarity of very energetic solar flares. Evidence is presented that suggest that cosmic radiation produced in a flare on the east limb of the sun is unable to reach the earth.

Riassunto

Si fa rilevare che i tre brillamenti solari che provocarono forti aumenti dell’intensità dei raggi cosmici terrestri furono osservati in luce bianca, mentre i due brillamenti che provocarono il più piccolo aumento non furono osservati. Ciò si interpreta come prova del fatto che solo i brillamenti di massima energia producono un’apprezzabile quantità di radiazione cosmica e che la rarità dell’effetto di brillamento sui raggi cosmici è dovuta, almeno in parte, alla rarità di brillamenti solari veramente intensi. Si danno prove che suggeriscono che la radiazione cosmica prodotta in brillamenti aventi luogo al lembo orientale del sole non possa raggiungere la terra.

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

  1. M. A. Ellison:Ninth Report on Solar-Terrestrial Relations (C.I.U.S.).

  2. K. G. McCracken: previous paper.

  3. The flare responsible for the March 1942 event was not observed visually. The evidence suggesting the position shown in the diagram has been given in references (1) and (2).

  4. T. Gold:Observalory,76, 47 (1956).

    Google Scholar 

  5. G. Cocconi, K. Greisen, P. Morrison, T. Gold andS. Hayakawa:Suppl. Nuovo Cimento,8, 161 (1958).

    Article  MATH  Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Additional information

This work was carried out during tenure of a General Motors Holden research fellowship.

Rights and permissions

Reprints and permissions

About this article

Cite this article

McCracken, K.G. A correlation between the emission of white light and cosmic radiation by a solar flare. Nuovo Cim 13, 1081–1085 (1959). https://doi.org/10.1007/BF02725119

Download citation

  • Received:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF02725119

Navigation