Advertisement

Solar Physics

, 294:4 | Cite as

Two Strong White-Light Solar Flares in AR NOAA 12673 as Potential Clues for Stellar Superflares

  • P. Romano
  • A. ElmhamdiEmail author
  • A. S. Kordi
Article

Abstract

Recently, two strong homologous white-light flares of GOES X-class occurred on the Sun on September 06, 2017, providing a rare exceptional opportunity to study the mechanisms responsible for the formation of the magnetic field configurations suitable for the manifestation of such yet enigmatic eruptive events and their effects in the lower layers of the solar atmosphere.

Using photospheric vector magnetograms, taken before the beginning of the two X-class events, as boundary conditions to reconstruct the non-linear force-free coronal magnetic field configuration, we identified two related 3D null points located at low heights above the photosphere (i.e. in very low corona). These null points are most likely responsible for the triggering of the two strong GOES X-class flares. We deduce that their formation at such low altitudes may plausibly be ascribed to the peculiar photospheric horizontal motions of the main magnetic structures of the hosting Active Region NOAA 12673.

These events can be adopted as a hint for a possible interpretation of the activity of young G-type stars, recently reported by the \(\mathit{Kepler}\) mission. We argue that a possible explanation of the acceleration of huge numbers of particles producing white-light emission, during the September 6 events as well as during white-light flares in young Sun-like stars, might be attributed to the special accompanying conditions of the occurrence of magnetic reconnection at low altitudes of their atmospheres.

Keywords

Sun: photosphere Sun: chromosphere Sun: flares Sun: magnetic fields 

Notes

Acknowledgements

The HMI and AIA data have been used courtesy of NASA/SDO and the AIA and HMI science teams. The authors extend their appreciation to the Deanship of Scientific Research at King Saud University for funding this work through research group No. (RG-1440-092).

Disclosure of Potential Conflicts of Interest

The authors declare that they have no conflicts of interest.

Facilities: SDO (HMI, AIA).

References

  1. Aulanier, G., Démoulin, P., Schrijver, C.J., Janvier, M., Pariat, E., Schmieder, B.: 2013, Astron. Astrophys. 549, A66. DOI. ADS. ADSCrossRefGoogle Scholar
  2. Balona, L.: 2015, Mon. Not. Roy. Astron. Soc. 447, 2714. DOI. ADS. ADSCrossRefGoogle Scholar
  3. Baumann, G., Haugbolle, T., Nordlund, Å.: 2013, Astrophys. J. 771, 93. DOI. ADS. ADSCrossRefGoogle Scholar
  4. Beveridge, C.: 2006, Solar Phys. 236, 41. DOI. ADS. ADSCrossRefGoogle Scholar
  5. Ding, M.D., Fang, C., Yun, H.S.: 1999, Astrophys. J. 512, 454. DOI. ADS. ADSCrossRefGoogle Scholar
  6. Ding, M.D., Liu, Y., Yeh, C.-T., Li, J.P.: 2003, Astron. Astrophys. 403, 1151. DOI. ADS. ADSCrossRefGoogle Scholar
  7. Falconer, D.A., Moore, R.L., Gary, G.A.: 2002, Astrophys. J. 569, 1016. DOI. ADS. ADSCrossRefGoogle Scholar
  8. Fang, C., Ding, M.D.: 1995, Astron. Astrophys. Suppl. Ser. 110, 99. ADS. ADSGoogle Scholar
  9. Galsgaard, K., Pontin, D.I.: 2011, Astron. Astrophys. 529, A20. DOI. ADS. ADSCrossRefGoogle Scholar
  10. Gosain, S., Venkatakrishnan, P.: 2010, Astrophys. J. 720, L137. DOI. ADS. ADSCrossRefGoogle Scholar
  11. Grechnev, V.V., Kurt, V.G., Chertok, I.M., Uralov, A.M., Nakajiama, H., Altyntsev, A.T., et al.: 2008, Solar Phys. 252, 149. DOI. ADS. ADSCrossRefGoogle Scholar
  12. He, H., Wang, H., Yan, Y.: 2011, J. Geophys. Res. 116, 1101. DOI. ADS. CrossRefGoogle Scholar
  13. Hoeksema, J.T., Liu, Y., Hayashi, K., Sun, X., Schou, J., Couvidat, S., et al.: 2014, Solar Phys. 289, 3483. DOI. ADS. ADSCrossRefGoogle Scholar
  14. Hudson, H.S., Wolfson, C.J., Metcalf, T.R.: 2006, Solar Phys. 234, 79. DOI. ADS. ADSCrossRefGoogle Scholar
  15. Hurford, G.J., Schmahl, E.J., Schwartz, R.A., Conway, A.J., Aschwanden, M.J., Csillaghy, A., et al.: 2002, Solar Phys. 210, 61. DOI. ADS. ADSCrossRefGoogle Scholar
  16. Jess, D.B., Mathioudakis, M., Crockett, P.J., Keenan, F.P.: 2008, Astrophys. J. 688, L119. DOI. ADS. ADSCrossRefGoogle Scholar
  17. Jiang, C., Wu, S.T., Feng, X., Hu, Q.: 2014, Astrophys. J. 780, 55. DOI. ADS. ADSCrossRefGoogle Scholar
  18. Katsova, M.M., Livshits, M.A.: 2015, Solar Phys. 290, 3663. DOI. ADS. ADSCrossRefGoogle Scholar
  19. Machado, M.E., Emslie, A.G., Avrett, E.H.: 1989, Solar Phys. 124, 303. DOI. ADS. ADSCrossRefGoogle Scholar
  20. Maehara, H., Shibayama, T., Notsu, S., Notsu, Y., Nagao, T., Kusaba, S., et al.: 2012, Nature 485, 478. DOI. ADS. ADSCrossRefGoogle Scholar
  21. Matthews, S.A., van Driel-Gesztelyi, L., Hudson, H.S., Nitta, N.V.: 2003, Astron. Astrophys. 409, 1107. DOI. ADS. ADSCrossRefGoogle Scholar
  22. Metcalf, T.R., Alexander, D., Hudson, H.S., Longcope, D.W.: 2003, Astrophys. J. 595, 483. DOI. ADS. ADSCrossRefGoogle Scholar
  23. Ni, L., Lin, J., Roussev, I.L., Schmieder, B.: 2016, Astrophys. J. 832, 195. DOI. ADS. ADSCrossRefGoogle Scholar
  24. Notsu, Y., Shibayama, T., Maehara, H., Notsu, S., Nagao, T.: 2013, Astrophys. J. 771, 127. DOI. ADS. ADSCrossRefGoogle Scholar
  25. Noyes, R.W., Hartmann, L.W., Baliunas, S.L., Duncan, D.K., Vaughan, A.H.: 1984, Astrophys. J. 279, 763. DOI. ADS. ADSCrossRefGoogle Scholar
  26. Pesnell, W.D., Thompson, B.J., Chamberlin, P.C.: 2012, Solar Phys. 275, 3. DOI. ADS. ADSCrossRefGoogle Scholar
  27. Priest, E.R., Forbes, T.: 2000, Magnetic Reconnection, Cambridge University Press, Cambridge. ADS. CrossRefGoogle Scholar
  28. Priest, E.R., Pontin, D.I.: 2009, Phys. Plasmas 16, 122101. DOI. ADS. ADSCrossRefGoogle Scholar
  29. Romano, P., Elmhamdi, A., Falco, M., Costa, P., Kordi, A.S., Al-Trabulsy, H.A., et al.: 2018, Astrophys. J. Lett. 852, L10. DOI. ADS. ADSCrossRefGoogle Scholar
  30. Schmidt, W., von der Luhe, O., Volkmer, R., Denker, C., Solanki, S.K., Balthasar, H., et al.: 2012, Astron. Nachr. 333, 796. DOI. ADS. ADSCrossRefGoogle Scholar
  31. Schuck, P.W.: 2008, Astrophys. J. 683, 1134. DOI. ADS. ADSCrossRefGoogle Scholar
  32. Shibayama, T., Maehara, H., Notsu, S., Notsu, y., Nagao, T., Honda, S., et al.: 2013, Astrophys. J. Suppl. 209, 5. DOI. ADS. ADSCrossRefGoogle Scholar
  33. Sui, L., Holman, G.D.: 2003, Astrophys. J. 596, L251. DOI. ADS. ADSCrossRefGoogle Scholar
  34. Sun, X., Norton, A.A.: 2017, Res. Notes AAS 1, 24. DOI. ADS. ADSCrossRefGoogle Scholar
  35. Svestka, Z.: 1966, Space Sci. Rev. 5, 388. DOI. ADS. ADSCrossRefGoogle Scholar
  36. Thomson, N.R., Rodger, C.J., Dowden, R.L.: 2004, Geophys. Res. Lett. 31, L6803. DOI. ADS. ADSCrossRefGoogle Scholar
  37. Verma, M.: 2018, Astron. Astrophys. 612, 101. DOI. ADS. ADSCrossRefGoogle Scholar
  38. Wang, H., Yurchyshyn, V., Liu, C., Ahn, K., Toriumi, S., Cao, W.: 2018, Res. Notes AAS 2, 8. DOI. ADS. ADSCrossRefGoogle Scholar
  39. Yan, Y., Li, Z.: 2006, Astrophys. J. 638, 1162. DOI. ADS. ADSCrossRefGoogle Scholar
  40. Yan, X.L., Wang, J.C., Pan, G.M., Kong, D.F., Xue, Z.K., Yang, L.H., et al.: 2018, Astrophys. J. 856, 79. DOI. ADS. ADSCrossRefGoogle Scholar
  41. Yang, S., Zhang, J., Zhu, X., Song, Q.: 2017, Astrophys. J. Lett. 849, 21. DOI. ADS. ADSCrossRefGoogle Scholar
  42. Yurchyshyn, V., Kumar, P., Abramenko, V., Xu, Y., Goode, P.R., Cho, K.-S., et al.: 2017, Astrophys. J. 838, 32. DOI. ADS. ADSCrossRefGoogle Scholar

Copyright information

© Springer Nature B.V. 2019

Authors and Affiliations

  1. 1.INAFOsservatorio Astrofisico di CataniaCataniaItaly
  2. 2.Department of Physics and AstronomyKing Saud UniversityRiyadhSaudi Arabia

Personalised recommendations