Hostname: page-component-cd9895bd7-fscjk Total loading time: 0 Render date: 2024-12-26T04:02:35.941Z Has data issue: false hasContentIssue false
  • English
  • Français

A model for the observed periodicity in the flaring rate on YY Gem

Published online by Cambridge University Press:  23 September 2016

J. G. Doyle ,
G.H.J. van den Oord ,
C. J. Butler  and
T. Kiang
J. G. Doyle
Affiliation:
1 Armagh Observatory, Armagh, N. Ireland
G.H.J. van den Oord
Affiliation:
2 Observatoire de Paris, Meudon, France
C. J. Butler
Affiliation:
1 Armagh Observatory, Armagh, N. Ireland
T. Kiang
Affiliation:
3 Dunsink Observatory, Dublin 15, Ireland

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Four flares were observed on the late-type binary YY Gem in March 1988 during a total monitoring time of 408 min. The flares were unusual in that there is a periodicity in their occurrence, being separated by 48 ± 3 min. Considering the flares to be formed as a stochastic process, we find that the probability of these events occurring by chance is 0.5%. Modelling indicates that for quite reasonable input parameters (e.g. a spot field strength of 1000 G and a filament with mass per unit length of 106g cm-1), the flare periodicity can be explained in terms of filament oscillations. The only requirement is that there should be a filament at these heights where the magnetic field drops inversely proportional to the height.

Type
IV Theoretical Problems and Interpretation of Observations
Information
Symposium - International Astronomical Union , Volume 137: Flare Stars in Star Clusters, Association and Solar Vicinity , 1990 , pp. 325 - 328
Copyright
Copyright © Kluwer 1990 

References

Joy, A.H., Abt, H.A.: 1974, Astrophys. J. Supp. 29,1 Google Scholar
Lukatskaya, F.L.: 1976, Soviet Astron. Lett. 2,61 Google Scholar
Moffett, T.J., Bopp, B.W.: 1971, Astrophys. J. Lett. 168,L117 Google Scholar
Pazzani, V., Rodono, M.: 1981, Astrophys. & Space Sci. 77,347 Google Scholar
Pettersen, B.R.: 1983, Astron. Astrophys. 120,192 Google Scholar
van Gent, H.: 1931, B.A.N. 6,99 Google Scholar
van Tend, W., Kuperus, M.: 1978, Solar Phys. 59,115 Google Scholar