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Generalization of the Neupert effect over the solar flare plasma cooling

Published online by Cambridge University Press:  18 July 2013

Arun Kumar Awasthi  and
Rajmal Jain
Arun Kumar Awasthi*
Affiliation:
Physical Research Laboratory, India
Rajmal Jain
Affiliation:
Physical Research Laboratory, India
*
*email: awasthi@prl.res.in
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Abstract

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We investigate 10 M-class flares observed by the SOXS mission to study the influence of the solar flare plasma cooling on the Neupert effect. We study the temporal evolution of 1s cadence X-ray emission in 7-10 keV and 10-30 keV representing the SXR and HXR emission respectively. We model the cooling as a function of time by the ratio of time-derivative of SXR with the HXR flux. We report that the ratio is exponentially decaying in rise phase of the flare, which, however, saturates after the impulsive phase. We estimate the cooling time scale in the rise phase for the flares and found to be varying between 39 and 525 s.

Keywords

Sun: flaresX-ray: flaresconductionradiation
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S294: Solar and Astrophysical Dynamos and Magnetic Activity , August 2012 , pp. 541 - 542
Copyright
Copyright © International Astronomical Union 2013 

References

Dennis, B. R. & Zarro, D. M. 1993, Solar Phys., 146, 177 Google Scholar
Culhane, J. L., Vesecky, J. F., & Phillips, K. J. H. 1970, Solar Phys., 15, 394 CrossRefGoogle Scholar
Holman, G. D., Aschwanden, M. J., Aurass, H., et al. 2011, Space Sci. Revs, 159, 107 Google Scholar
Ning, Z. & Li, D. 2012, Ap&SS, 338, 15 Google Scholar
Jain, R., Awasthi, A. K., Rajpurohit, A. S., & Aschwanden, M. J. 2011, Solar Phys., 270, 137 CrossRefGoogle Scholar
Achwanden, M. J, 2005, The Physics of Solar Corona: problems and solutions Google Scholar
Jain, R., Dave, H., Shah, A. B., et al. 2005, Solar Phys., 227, 89 Google Scholar