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Magnetic Transients During the Flares of May 9, 2012, in NOAA 11476 and July 4, 2012, in NOAA 11515

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Variations in the longitudinal magnetic field in NOAA 11476 and NOAA 11515 during M-class solar flares are studied. Magnetic field observations were made by the Solar Dynamics Observatory using the Helioseismic and Magnetic Imager (SDO/HMI) with temporal and spatial resolutions of 45 s and 0".5 pixel-1, respectively. During the maximum phase of the M5.7/2B flare of May 9, 2012, in NOAA 11476, and the M5.3/2B flare of July 4, 2012, in NOAA 11515, there were abrupt changes in the magnetic field of the active regions. Transient structures with the opposite sign appeared in high magnetic fields with negative polarity. The transients were located in the umbra of sunspots and lasted several minutes. We study these features of the magnetic field in detail.

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References

  1. A. Patterson and H. Zirin, Astrophys. J. 243, L99 (1981).

    Article  ADS  Google Scholar 

  2. N. I. Lozitskaya and V. G. Lozitskii, Sov. Astron. Lett. 8, 270 (1982).

    ADS  Google Scholar 

  3. H. Wang, Solar Phys. 140, 85 (1992).

    Article  ADS  Google Scholar 

  4. H. Wang, Jr. M. W. Ewell, H. Zirin, et al., Astrophys. J. 424, 436 (1994).

    Article  ADS  Google Scholar 

  5. A. G. Kosovichev and V. V. Zharkova, Astrophys. J. 550, L105 (2001).

    Article  ADS  Google Scholar 

  6. H. Wang, et al., Astrophys. J. 576, 497 (2002).

    Article  ADS  Google Scholar 

  7. J. J. Sudol and J. W. Harvey, Astrophys. J. 635, 647 (2005).

    Article  ADS  Google Scholar 

  8. G. J. D. Petrie and J. J. Sudol, Astrophys. J. 724, 1218 (2010).

    Article  ADS  Google Scholar 

  9. S. Wang, et al., Astrophys. J. 745, L17 (2012).

    Article  ADS  Google Scholar 

  10. R. A. Maurya, P. Vemareddy, and A. Ambastha, Astrophys. J. 747, 134 (2012).

    Article  ADS  Google Scholar 

  11. O. Burtseva, J. C. Martínez-Oliveros, G. J. D. Petrie, et al., Astrophys. J. 806, 173 (2015).

  12. T. J. Spirock, V. B. Yurchyshyn, and H. Wang, Astrophys. J. 572, 1072 (2002).

    Article  ADS  Google Scholar 

  13. H. Wang, Astrophys. J. 649, 490 (2006).

    Article  ADS  Google Scholar 

  14. Y. L. Song and M. Zhang, Astrophys. J. 826, 173 (2016).

    Article  ADS  Google Scholar 

  15. A. Patterson, Astrophys. J. 280, 884 (1984).

    Article  ADS  Google Scholar 

  16. J. Schou, et al., Solar Phys. 275, 229 (2012).

    Article  ADS  Google Scholar 

  17. S. M. White, R. J. Thomas, and R. A. Schwartz, Solar Phys. 227, 231 (2005).

    Article  ADS  Google Scholar 

  18. R. A. Maurya and A. Ambastha, Solar Phys. 258, 31 (2009).

    Article  ADS  Google Scholar 

Download references

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Authors and Affiliations

  1. Crimean Astrophysical Observatory, Russian Academy of Sciences, Crimea, Russia

    O. S. Gopasyuk

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  1. O. S. Gopasyuk
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Correspondence to O. S. Gopasyuk.

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Translated from Astrofizika, Vol. 61, No. 2, pp. 287-295 (May 2018).

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Gopasyuk, O.S. Magnetic Transients During the Flares of May 9, 2012, in NOAA 11476 and July 4, 2012, in NOAA 11515. Astrophysics 61, 254–261 (2018). https://doi.org/10.1007/s10511-018-9532-y

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  • DOI: https://doi.org/10.1007/s10511-018-9532-y

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