Skip to main content

Advertisement

SpringerLink
Log in

Dynamic Precursors of Flares in Active Region NOAA 10486

  • Published:
Journal of Astrophysics and Astronomy Aims and scope Submit manuscript

Abstract

Four different methods are applied here to study the precursors of flare activity in the Active Region NOAA 10486. Two approaches track the temporal behaviour of suitably chosen features (one, the weighted hori- zontal gradient W G M , is the generalized form of the horizontal gradient of the magnetic field, G M ; the other is the sum of the horizontal gradient of the magnetic field, G S , for all sunspot pairs). W G M is a photospheric indicator, that is a proxy measure of magnetic non-potentiality of a specific area of the active region, i.e., it captures the temporal variation of the weighted horizontal gradient of magnetic flux summed up for the region where opposite magnetic polarities are highly mixed. The third one, referred to as the separateness parameter, S l−f , considers the overall morphology. Further, G S and S l−f are photospheric, newly defined quick-look indicators of the polarity mix of the entire active region. The fourth method is tracking the temporal variation of small X-ray flares, their times of succession and their energies observed by the Reuven Ramaty High Energy Solar Spectroscopic Imager instrument. All approaches yield specific pre-cursory signatures for the imminence of flares.

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

Figure 1
Figure 2
Figure 3
Figure 4
Figure 5

Similar content being viewed by others

Notes

  1. http://fenyi.solarobs.unideb.hu/SDD/SDD.html

  2. https://www.nsof.class.noaa.gov/release/data_available/goes/index.htm

  3. http://hesperia.gsfc.nasa.gov/rhessi3/data-access/rhessi-data/rhessi-data/index.html

  4. http://www.spaceweather.com/glossary/magneticclasses.html

  5. http://fenyi.solarobs.unideb.hu/ESA/HMIDD.html

References

  • Ambastha, A., Hagyard, Mona J., West, E. A. 1993, Solar Phys., 148, 277–299.

  • Balázs, L. G., Gyenge, N., Korsós,M. B., Baranyi, T., Forgács-Dajka, E., Ballai, I. 2014, Mon. Not. R. Astron. Soc., 441, 1157–1165.

  • Chifor, C., Tripathi, D., Mason, H. E., Dennis, B. R. 2007, Astron. Astrophys., 472, 967–979.

  • Cui, Y., Li, R., Zhang, L., He, Y., Wang, H. 2006, Solar Phys., 237, 45–59.

  • Cui, Y., Li, R., Wang, H., He, H. 2007, Solar Phys., 242, 1–8.

  • Deng, N., Xu, Y., Yang, G., Cao,W., Liu, C., Rimmele, T. R.,Wang, H., Denker, C. 2006, The Astrophys. J., 644, 1278–1291.

  • Falconer, D. A., Moore, R. L., Gary, G. A. 2002, The Astrophys. J., 569, 1016–1025.

  • Győri, L., Baranyi, T., Ludmány, A. 2011, IAU Symp., 273, 403–407.

  • Jakimiec, M., Kovács, Á. 1990, Acta Astronomica, 40(3), 3050–311.

  • Joshi, B., Kushwaha, U., Cho, K.-S., Veronig, A. M. 2013, The Astrophys. J., 771, 1–14.

  • Kim, S., Moon, Y.-J., Kim, Y.-H., Park, Y.-D., Kim, K.-S., Choe, G. S., Kim, K.-H. 2008, The Astrophys. J., 683, 510–515.

  • Korsós, M. B., Baranyi, T., Ludmány, A. 2014, Pre-flare Dynamics of Sunspot Groups, The Astrophys. J., 789. Issue 2, article id. 107, 7 pp., Paper I.

  • Korsós, M. B., Baranyi, T., Ludmány, A. 2015, Journal of Space Weather and Space Climate, submitted.

  • Lin, R. P., Dennis, B., Hurford, G., Smith, D. M., Zehnder, A. 2002, Solar Phys., 5171, 38–52.

  • Mathew, S. K., Ambastha, A. 2000, Solar Phys., 197, 75–84.

  • McIntosh, P. S. 1990, Solar Phys., 125, 251–267.

  • Mumford, S., Pérez–Suárez, D., Christe, D., Mayer, F., Hewett, R. J. 2013, SunPy: Python for Solar Physicists; Proceedings of the 12th Python in Science Conference, 74–77.

  • Schrijver, C. J. 2007, The Astrophys. J., 655, L117–L120.

  • Steward, G., Lobzin, V., Wilkinson, P. J. 2011, Automatic recognition of complex magnetic regions on the Sun in GONG magnetogram images and prediction of flares: Techniques for the flare warning program Flarecast, Space Weather, 9, S11004.

  • Vemareddy, P., Ambastha, A., Maurya, R. A. 2012, The Astrophys. J., 761, 60–73.

  • Wang, H. 2006, The Astrophys. J., 649, 490–497.

  • Yamada, M. 1999, J. Geophys. Res., 104, 14529–14542.

  • Yan, X.-L., Qu, Z.-Q., Kong, D.-F. 2008, Mon. Not. R. Astron. Soc., 391, 1887–1892.

  • Zhang, Y., Liu, J., Zhang, H. 2008, Solar Phys. 247, 39.

  • Zuccarello, F., Romano, P., Farnik, F., Karlicky, M., Contarino, L., Battiato, V., Guglielmino, S. L., Comparato, M., Ugarte-Urra, I. 2009, Astron. Astrophys., 493, 629–637.

Download references

Acknowledgements

The research leading to these results has received funding from the European Community’s Seventh Framework Programme (FP7/2007–2013) under grant agreement eHEROES (project No. 284461). This research has made use of SunPy, an open-source and free community-developed solar data analysis package written in Python (Mumford et al. 2013). MBK is grateful to Science and Technology Facilities Council (STFC) UK for the financial support received.

Author information

Authors and Affiliations

  1. Heliophysical Observatory, Research Centre for Astronomy and Earth Sciences, Hungarian Academy of Sciences, Debrecen, P.O. Box 30, H-4010, Hungary

    M. B. Korsós, N. Gyenge, T. Baranyi & A. Ludmány

  2. Solar Physics and Space Plasma Research Center (SP2RC), University of Sheffield, Hounsfield Road, S3 7RH, United Kingdom

    M. B. Korsós & N. Gyenge

Authors
  1. M. B. Korsós
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. N. Gyenge
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. T. Baranyi
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. A. Ludmány
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to M. B. Korsós.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Korsós, M.B., Gyenge, N., Baranyi, T. et al. Dynamic Precursors of Flares in Active Region NOAA 10486. J Astrophys Astron 36, 111–121 (2015). https://doi.org/10.1007/s12036-015-9329-x

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s12036-015-9329-x

Key words

Search

Navigation