Abstract
It is shown how the kinetic energy of the rotational motion of a sunspot can be transferred to electromagnetic energy in filamentary currents. The time needed for preconditioning the solar atmosphere for a flare varies within wide limits. For small flares it may be of the order of minutes; for large flares, of the order of hours or days.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Abetti, G.: 1932, Osserv. Mem. Oss. Astrofis. Arcetri 50, 47.
Alfvén, H.: 1968, Ann. Geophys. 24, 341.
Alfvén, H. and Carlqvist, P.: 1967, Solar Phys. 1, 220.
Alfvén, H. and Fälthammar, C.-G.: 1963, Cosmical Electrodynamics, 2nd ed., Clarendon Press, Oxford.
Beckers, J. M. and Schröter, E. H.: 1968, Solar Phys. 4, 142.
Bhatnagar, A.: 1967, Kodaikanal Observ. Bull., Ser. A, No. 180.
Carlqvist, P.: 1969, Solar Phys. 7, 377.
Evershed, J.: 1910, Monthly Notices Roy. Astron. Soc. 70, 217.
Gopasyuk, S. I.: 1965, Izv. Krymsk. Astrofiz. Observ. 33, 100.
Maltby, P.: 1964, Astrophys. Norw. 8, 205.
Moreton, G. E. and Severny, A. B.: 1968, Solar Phys. 3, 282.
Severny, A. B.: 1965, Astron. Zh. 42, 217.
Stenflo, J. O.: 1966, Ark. Astron. 4, 173 (Medd. Lunds. Astron. Observ., Ser. I, No. 215).
Stenflo, J. O.: 1968, Medd. Lunds Astron. Observ., Ser. II, No. 153.
Stepanov, V. E., and Gopasyuk, S. I.: 1962, Izv. Krymsk. Astrofiz. Observ. 28, 194.
St. John, C. E.: 1913, Astrophys. J. 37, 322.
Author information
Authors and Affiliations
Additional information
Presently Guest Investigator at the Mount Wilson and Palomar Observatories.
Rights and permissions
About this article
Cite this article
Stenflo, J.O. A mechanism for the build-up of flare energy. Sol Phys 8, 115–118 (1969). https://doi.org/10.1007/BF00150662
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00150662