Hostname: page-component-cd9895bd7-7cvxr Total loading time: 0 Render date: 2024-12-25T18:48:51.288Z Has data issue: false hasContentIssue false
  • English
  • Français

Origin of extreme solar eruptive activity from the active region NOAA 12673 and the largest flare of solar cycle 24

Published online by Cambridge University Press:  28 September 2023

Bhuwan Joshi Open the ORCID record for Bhuwan Joshi [Opens in a new window]  and
Prabir K. Mitra
Bhuwan Joshi
Affiliation:
Udaipur Solar Observatory, Physical Research Laboratory, Udaipur 313 001, India
Prabir K. Mitra
Affiliation:
Udaipur Solar Observatory, Physical Research Laboratory, Udaipur 313 001, India
Rights & Permissions [Opens in a new window]

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.

During 2017, when the Sun was moving toward the minimum phase of solar cycle 24, an exceptionally eruptive active region (AR) NOAA 12673 emerged on the Sun during August 28-September 10. During the highest activity level, the AR turned into a δ-type sunspot region, which manifests the most complex configuration of magnetic fields from the photosphere to the coronal heights. The AR 12673 produced four X-class and 27 M-class flares, along with numerous C-class flares, making it one of the most powerful ARs of solar cycle 24. Notably, it produced the largest flare of solar cycle 24, namely, the X9.3 event on 2017 September 6. In this work, we highlight the results of our comprehensive analysis involving multi-wavelength imaging and coronal magnetic field modeling to understand the evolution and eruptivity from AR 12673. We especially focus on the morphological, spectral and kinematical evolution of the two X-class flares on 6 September 2017. We explore various large- and small-scale magnetic field structures of the active region which are associated with the triggering and subsequent outbursts during the powerful solar transients.

Keywords

Sun: activitySun: coronaSun: coronal mass ejections (CMEs)Sun: flaresSun: magnetic fields
Type
Contributed Paper
Information
Proceedings of the International Astronomical Union , Volume 18 , Symposium S372: The Era of Multi-Messenger Solar Physics , August 2022 , pp. 62 - 69
Check for updates
Copyright
© The Author(s), 2023. Published by Cambridge University Press on behalf of International Astronomical Union

References

Aulanier, G. 2014, in Nature of Prominences and their Role in Space Weather, ed. Schmieder, B., Malherbe, J.-M., & Wu, S. T., Vol. 300, 184–196Google Scholar
Chen, B., Yu, S., Reeves, K. K., & Gary, D. E. 2020, ApJ Letters, 895, L50 CrossRefGoogle Scholar
Gary, D. E., Chen, B., Dennis, B. R., et al. 2018, ApJ, 863, 83 CrossRefGoogle Scholar
Hou, Y. J., Zhang, J., Li, T., Yang, S. H., & Li, X. H. 2018, A&A, 619, A100 CrossRefGoogle Scholar
Joshi, B., Kushwaha, U., Veronig, A. M., et al. 2017, ApJ, 834, 42 CrossRefGoogle Scholar
Liu, L., Cheng, X., Wang, Y., & Zhou, Z. 2019, ApJ, 884, 45 CrossRefGoogle Scholar
Mitra, P. K., Joshi, B., & Prasad, A. 2020 a, SoPh, 295, 29CrossRefGoogle Scholar
Mitra, P. K., Joshi, B., Prasad, A., Veronig, A. M., & Bhattacharyya, R. 2018, ApJ, 869, 69 CrossRefGoogle Scholar
Mitra, P. K., Joshi, B., Veronig, A. M., et al. 2020 b, ApJ, 900, 23 CrossRefGoogle Scholar
Moraitis, K., Sun, X., Pariat, É., & Linan, L. 2019, A&A, 628, A50 CrossRefGoogle Scholar
Prasad, A., Dissauer, K., Hu, Q., et al. 2020, ApJ, 903, 129 CrossRefGoogle Scholar
Romano, P., Elmhamdi, A., Falco, M., et al. 2018, ApJ Letters, 852, L10 CrossRefGoogle Scholar
Seaton, D. B. & Darnel, J. M. 2018, ApJ Letters, 852, L9 CrossRefGoogle Scholar
Takizawa, K. & Kitai, R. 2015, SoPh, 290, 2093 CrossRefGoogle Scholar
Verma, M. 2018, A&A, 612, A101 CrossRefGoogle Scholar
Veronig, A. M., Podladchikova, T., Dissauer, K., et al. 2018, ApJ, 868, 107 CrossRefGoogle Scholar
Wiegelmann, T., Thalmann, J. K., Inhester, B., et al. 2012, SoPh, 281, 37 Google Scholar
Yang, S., Zhang, J., Zhu, X., & Song, Q. 2017, ApJ Letters, 849, L21 CrossRefGoogle Scholar