Hostname: page-component-76fb5796d-wq484 Total loading time: 0 Render date: 2024-04-26T00:50:54.767Z Has data issue: false hasContentIssue false
  • English
  • Français

On the Thermal Interpretation of Hard X-Ray Bursts from Solar Flares

Published online by Cambridge University Press:  25 May 2016

John C. Brown
John C. Brown*
Affiliation:
Dept. of Astronomy, University of Glasgow, Glasgow, Scotland

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.

The possible validity of thermal bremsstrahlung models of flare hard X-ray bursts is investigated quantitatively. In particular, the problem of rapid thermal conduction in ‘multi-temperature’ models is adequately examined for the first time by using a continuous temperature distribution consistent with the observed X-ray spectrum. This distribution is obtained from a general analytic solution for the temperature structure required to mimick any ‘non-thermal’ spectrum, the method being equally applicable to cosmic sources.

It is concluded that the thermal interpretation might extend to X-rays of hundreds of keV, a result with important consequences for flare energetics. The relationship of such a model to observations of X-ray polarization and rapid time variations is also considered.

Type
Part III Shock Waves and Plasma Ejection
Information
Symposium - International Astronomical Union , Volume 57: Coronal Disturbances , 1974 , pp. 395 - 412
Copyright
Copyright © Reidel 1974 

References

Abramowitz, M. and Segun, I. A.: 1965, Handbook of Mathematical Functions, Dover.Google Scholar
Batestone, R. M., Evans, K., Parkinson, J. H., and Pounds, K. A.: 1970, Solar Phys. 13, 389.Google Scholar
Beigman, I. L. and Vainshtein, L. A.: 1974, Astron. J. (USSR), in press.Google Scholar
Billings, D. E.: 1966, A Guide to the Solar Corona, Academic Press, N.Y. Google Scholar
Brown, J. C.: 1971, Solar Phys. 18, 489.Google Scholar
Brown, J. C.: 1972a, Solar Phys. 25, 158.CrossRefGoogle Scholar
Brown, J. C.: 1972b, Solar Phys. 26, 441.Google Scholar
Brown, J. C.: 1973a, Solar Phys. 28, 151.Google Scholar
Brown, J. C.: 1973b, Solar Phys. 31, 143.Google Scholar
Brown, J. C.: 1973c, Solar Phys. 32, 227.Google Scholar
Brown, J. C., McClymont, A. N., and McLean, I. S.: 1974, Nature 247, 448.Google Scholar
Chambe, G.: 1971, Astron. Astrophys. 12, 210.Google Scholar
Chubb, T. A., Kreplin, R. W., and Friedman, H.: 1966, J. Geophys. Res. 71, 3611.Google Scholar
Chubb, T. A.: 1970, in Dyer, E. R. (ed.), Proc. Leningrad Symp. Solar Terrestrial Phys., Vol. 1, D. Reidel Publ. Co., Dordrecht, Holland.Google Scholar
Chupp, E. L., Forrest, D. J., Higbie, P. R., Suri, A. N.C., and Dunphy, P. P.: 1973, Nature 241, 333.CrossRefGoogle Scholar
Cline, T. L., Holt, S. S., and Hones, E. W.: 1968, J. Geophys. Res. 73, 434.Google Scholar
Culhane, J. L.: 1969, Monthly Notices Roy. Astron. Soc. 144, 375.Google Scholar
Culhane, J. L., Vesecky, J. F., and Phillips, K. J. H.: 1970, Solar Phys. 15, 394.Google Scholar
Dollfus, A.: 1966, in Hess, , Menzel, , and O'Keefe, (eds.), The Nature of the Lunar Surface, John Hopkins, Press.Google Scholar
Drake, J. F.: 1971, Solar Phys. 16, 152.Google Scholar
Elwert, G. and Haug, E.: 1971, Solar Phys. 20, 413.Google Scholar
Felten, J. E. and Rees, M. J.: 1972, Astron. Astrophys. 17, 226.Google Scholar
Fichtel, C. E. and McDonald, F. B.: 1967, Ann. Rev. Astron. Astrophys. 5, 351.CrossRefGoogle Scholar
Frost, K. J.: 1969, Astrophys. J. 158, L.159.Google Scholar
Greisen, E.: 1971, Physics of Cosmic X-Ray, γ-Ray and Particle Sources, Gordon and Breach.Google Scholar
Herring, J. R. H. and Craig, I. J. D.: 1973, Solar Phys. 28, 169.Google Scholar
Haug, E.: 1972, Solar Phys. 25, 425.Google Scholar
Illarionov, A. F. and Sunyaev, R. A.: 1973, Astrophys. Space Sci. 19, 61.Google Scholar
De Jager, C.: 1967, Solar Phys. 2, 327.Google Scholar
Kahler, S. W.: 1971a, Astrophys. J. 164, 365.Google Scholar
Kahler, S. W.: 1971b, Astrophys. J. 168, 319.Google Scholar
Kane, S. R. and Anderson, K. A.: 1970, Astrophys. J. 162, 1003.Google Scholar
Kane, S. R. and Donnelly, J. E.: 1971, Astrophys. J. 164, 151.Google Scholar
Kuperus, M.: 1969, Space Sci. Rev. 9, 713.Google Scholar
Milkey, R. W.: 1971, Solar Phys. 16, 465.Google Scholar
Neupert, W. M.: 1968, Astrophys. J. 153, L.59.CrossRefGoogle Scholar
Neupert, W. M.: 1969, Ann. Rev. Astron. Astrophys. 7, 121.Google Scholar
Ohki, K.: 1969, Solar Phys. 7, 260.Google Scholar
Parks, G. K. and Winckler, J. R.: 1969, Astrophys. J. 155, L117.Google Scholar
Parks, G. K. and Winckler, J. R.: 1971, Solar Phys. 16, 186.Google Scholar
Pintér, Š.: 1969, Solar Phys. 8, 142.Google Scholar
Santangelo, N., Horstman, H., and Horstman-Moretti, E.: 1973, Solar Phys. 29, 143.Google Scholar
Sneddon, I. N.: 1972, The Use of Integral Transforms, McGraw Hill.Google Scholar
Spitzer, L.: 1962, Physics of Fully Ionised Gases, Interscience, New York.Google Scholar
Takakura, T.: 1967, Solar Phys. 1, 304.Google Scholar
Takakura, T., Ohki, K., Shibuya, N., Fujii, M., Matsuoka, M., Miyamoto, S., Nishimura, J., Oda, M., Ogawara, Y., and Ota, S.: 1971, Solar Phys. 16, 454.Google Scholar
Tindo, I. P., Ivanov, V. D., Mandelstam, S. L., and Shuryghin, A. I.: 1970, Solar Phys. 14, 204.Google Scholar
Tindo, I. P., Ivanov, V. D., Mandelstam, S. L., and Shuryghin, A. I.: 1972, Solar Phys. 27, 426.Google Scholar
Tindo, I. P., Mandelstam, S. L., and Shuryghin, A. H.: 1973, Solar Phys. 32, 469.Google Scholar
Tomblin, F. F.: 1972, Astrophys. J. 171, 377.Google Scholar
Vaiana, G. S., Reidy, W. P., Zehnpfennig, T., Van Speybröck, L., and Giacconi, R.: 1968, Science 161, 564.Google Scholar
Wilson, P. R.: 1972, Solar Phys. 22, 434.Google Scholar