Skip to main content
SpringerLink
Log in

Dynamics of the hard X-ray, gamma-ray, and microwave emission of solar flares produced by the active region NOAA 0069 in August 2002

  • Published:
Astronomy Reports Aims and scope Submit manuscript

Abstract

Regularities have been searched for in the dynamics of characteristics of flare solar radiation during the development of the active region NOAA 0069 in the interval of August 14–24, 2002. The SONG (Solar Neutrons and Gamma rays) instrument onboard the Russian CORONAS-F Solar Observatory recorded hard X-ray and gamma-ray radiation in nine of the 30 flares of class above C5 in this active region within the indicated time interval. It was obtained that, in accordance with the development of the active region, the X- and gamma-ray flux tended to increase at the flare maxima while the hard X-ray spectral index tended to decrease; flares with a harder radiation spectrum occurred in the sunspot umbra, i.e., in the region with the strongest magnetic fields.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. L. Fletcher, B. R. Dennis, H. S. Hudson, et al., Space Sci. Rev. 159, 19 (2011).

    Article  ADS  Google Scholar 

  2. M. A. Livshits, in Plasma Processes in the Solar System (Inst. Kosm. Issled. RAN, Moscow, 2008), p. 51 [in Russian].

    Google Scholar 

  3. The Classification of X-ray Solar Flares. http://www.spaceweather.com/glossary/flareclasses.html.

  4. A. G. Emslie, H. Kucharek, B. R. Dennis, et al., J. Geophys. Res.: Space Phys. 109, A10104 (2004).

    Article  ADS  Google Scholar 

  5. S. N. Kuznetsov, Yu. I. Denisov, I. N. Myagkova, et al., Izv. Akad. Nauk, Ser. Fiz. 67, 478 (2003).

    Google Scholar 

  6. A. V. Belov, G. Garsiya, V. G. Kurt, et al., Kosmich. Issled. 43, 165 (2005).

    Google Scholar 

  7. M. Ackermann, M. Ajello, A. Allafort, et al., Astrophys. J. 745, 11 (2012).

    Article  Google Scholar 

  8. G. D. Fleishman, E. P. Kontar, G. M. Nita, et al., Astrophys. J. Lett. 731, L19 (2011).

    Article  ADS  Google Scholar 

  9. Solar-Terrestial Physics. Experiments Results at CORONAS-F Satellite, Ed. by V. D. Kuznetsov (Fizmatlit, Moscow, 2009), p. 295 [in Russian].

    Google Scholar 

  10. S. N. Kuznetsov, V. G. Kurt, I. N. Myagkova, et al., Solar System Res. 40, 104 (2006).

    Article  ADS  Google Scholar 

  11. T. S. Bastian, A. O. Benz, and D. E. Gary, Ann. Rev. Astron. Astrophys. 36, 131 (1998).

    Article  ADS  Google Scholar 

  12. P. H. Scherrer, R. S. Bogart, R. I. Bush, et al., Solar Phys. 162, 129 (1995).

    Article  ADS  Google Scholar 

  13. I. N. Myagkova, S. N. Kuznetsov, V. G. Kurt, et al., Adv. Space Res. 40, 1929 (2007).

    Article  ADS  Google Scholar 

  14. SOHO LASCO CME Catalog. http://cdaw.gsfc. nasa.gov/CME_list

  15. V. E. Reznikova, V. F. Melnikov, K. Shibasaki, et al., Astrophys. J. 697, 735 (2009).

    Article  ADS  Google Scholar 

  16. V. V. Grechnev, V. G. Kurt, I. M. Chertok, et al., Solar Phys. 252, 149 (2008).

    Article  ADS  Google Scholar 

  17. M. R. Kundu, V. V. Grechnev, S. M. White, et al., Solar Phys. 260, 135 (2009).

    Article  ADS  Google Scholar 

  18. A. G. Emslie, B. R. Dennis, A. Y. Shih, et al., Astrophys. J. 759, 18 (2012).

    Article  Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Skobel’tsyn Research Institute of Nuclear Physics, Lomonosov Moscow State University, Leninskie Gory, Moscow, 119234, Russia

    A. V. Bogomolov & I. N. Myagkova

  2. Institute of Solar-Terrestrial Physics, Siberian Branch of the Russian Academy of Sciences, P. O. Box 4026, Irkutsk, 664033, Russia

    L. K. Kashapova

  3. Crimean Astrophysical Observatory, Nauchnyi, Crimea, 98409, Ukraine

    Yu. T. Tsap

Authors
  1. A. V. Bogomolov
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. L. K. Kashapova
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. I. N. Myagkova
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. Yu. T. Tsap
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to A. V. Bogomolov.

Additional information

Original Russian Text © A.V. Bogomolov, L.K. Kashapova, I.N. Myagkova, Yu.T. Tsap, 2014, published in Astronomicheskii Zhurnal, 2014, Vol. 91, No. 3, pp. 211–222.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Bogomolov, A.V., Kashapova, L.K., Myagkova, I.N. et al. Dynamics of the hard X-ray, gamma-ray, and microwave emission of solar flares produced by the active region NOAA 0069 in August 2002. Astron. Rep. 58, 156–166 (2014). https://doi.org/10.1134/S1063772914030020

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1134/S1063772914030020

Keywords

Search

Navigation