Skip to content

Research at St Andrews

Eruptions and flaring activity in emerging quadrupolar regions

Research output: Contribution to journalArticlepeer-review

Author(s)

P. Syntelis, E. J. Lee, C. W. Fairbairn, V. Archontis, A. W. Hood

School/Research organisations

Abstract

Context. Solar observations suggest that some of the most dynamic active regions are associated with complex photospheric magnetic configurations such as quadrupolar regions, and especially those that have a δ-spot configuration and a strong polarity inversion line (PIL).
Aims. We study the formation and eruption of magnetic flux ropes in quadrupolar regions.
Methods. We performed 3D magnetohydrodynamics simulations of the partial emergence of a highly twisted flux tube from the solar interior into a non-magnetised stratified atmosphere. We introduced a density deficit at two places along the length of the subphotospheric flux tube to emerge as two Ω-shaped loops, forming a quadrupolar region.
Results. At the photosphere, the emerging flux forms two initially separated bipoles, which later come in contact, forming a δ-spot central region. Above the two bipoles, two magnetic lobes expand and interact through a series of current sheets at the interface between them. Two recurrent confined eruptions are produced. In both cases, the reconnection between sheared low-lying field lines forms a flux rope. The reconnection between the two lobes higher in the atmosphere forms field lines that retract down and push against the flux rope, creating a current sheet between them. It also forms field lines that create a third magnetic lobe between the two emerged lobes, that later acts as a strapping field. The flux rope eruptions are triggered when the reconnection between the flux ropes and the field above the ropes becomes efficient enough to remove the tension of the overlying field. These reconnection events occur internally in the quadrupolar system, as the atmosphere is non-magnetised. The flux rope of the first, weaker, eruption almost fully reconnects with the overlying field. The flux rope of the second, more energetic, eruption is confined by the overlying strapping field. During the second eruption, the flux rope is enhanced in size, flux, and twist, similar to confined-flare-to-flux-rope observations. Proxies of the emission reveal the two erupting filaments channels. A flare arcade is only formed in the second eruption owing to the longer lasting and more efficient reconnection at the current sheet below the flux rope.
Close

Details

Original languageEnglish
Article numberA134
Pages (from-to)1-14
Number of pages14
JournalAstronomy & Astrophysics
Volume630
Early online date4 Oct 2019
DOIs
Publication statusPublished - Oct 2019

    Research areas

  • Sun: activity, Sun: corona, Sun: magnetic fields, Magnetohydrodynamics (MHD), Methods: numerical

Discover related content
Find related publications, people, projects and more using interactive charts.

View graph of relations

Related by author

  1. Successful and failed flux tube emergence in the solar interior

    Syntelis, P., Archontis, V. & Hood, A., 18 Mar 2019, In: Astrophysical Journal. 874, 1, 17 p., 15.

    Research output: Contribution to journalArticlepeer-review

  2. Sunspot rotation: I. A consequence of flux emergence

    Sturrock, Z., Hood, A. W., Archontis, V. & McNeill, C., Oct 2015, In: Astronomy & Astrophysics. 582, p. 1-14 14 p., A76.

    Research output: Contribution to journalArticlepeer-review

  3. Helical blowout jets in the sun: untwisting and propagation of waves

    Lee, E. J., Archontis, V. & Hood, A. W., 1 Jan 2015, In: Astrophysical Journal Letters. 798, 1, p. 1-6 6 p., L10.

    Research output: Contribution to journalArticlepeer-review

  4. Recurrent explosive eruptions and the "sigmoid-to-arcade" transformation in the Sun driven by dynamical magnetic flux emergence

    Archontis, V., Hood, A. W. & Tsinganos, K., 10 May 2014, In: Astrophysical Journal Letters. 786, 2, 5 p., L21.

    Research output: Contribution to journalArticlepeer-review

  5. The emergence of weakly twisted magnetic fields in the Sun

    Archontis, V., Hood, A. W. & Tsinganos, K., 1 Nov 2013, In: Astronomical Journal. 778, 1, 15 p., 42.

    Research output: Contribution to journalArticlepeer-review

Related by journal

  1. Astronomy & Astrophysics (Journal)

    Duncan Hendry Mackay (Editor)

    2004 → …

    Activity: Publication peer-review and editorial work typesEditor of research journal

  2. Astronomy & Astrophysics (Journal)

    Christiane Helling (Editor)

    2000 → …

    Activity: Publication peer-review and editorial work typesEditor of research journal

  3. Astronomy & Astrophysics (Journal)

    Alan William Hood (Editor)

    1980 → …

    Activity: Publication peer-review and editorial work typesEditor of research journal

Related by journal

  1. CHEOPS observations of the HD 108236 planetary system: A fifth planet, improved ephemerides, and planetary radii

    Bonfanti, A., Delrez, L., Hooton, M. J., Wilson, T. G., Fossati, L., Alibert, Y., Hoyer, S., Mustill, A. J., Osborn, H. P., Adibekyan, V., Gandolfi, D., Salmon, S., Sousa, S. G., Tuson, A., Van Grootel, V., Cabrera, J., Nascimbeni, V., Maxted, P. F. L., Barros, S. C. C., Billot, N. & 89 others, Bonfils, X., Borsato, L., Broeg, C., Davies, M. B., Deleuil, M., Demangeon, O. D. S., Fridlund, M., Lacedelli, G., Lendl, M., Persson, C., Santos, N. C., Scandariato, G., Szabó, G. M., Collier Cameron, A., Udry, S., Benz, W., Beck, M., Ehrenreich, D., Fortier, A., Isaak, K. G., Queloz, D., Alonso, R., Asquier, J., Bandy, T., Bárczy, T., Barrado, D., Barragán, O., Baumjohann, W., Beck, T., Bekkelien, A., Bergomi, M., Brandeker, A., Busch, M-D., Cessa, V., Charnoz, S., Chazelas, B., Corral Van Damme, C., Demory, B-O., Erikson, A., Farinato, J., Futyan, D., Garcia Muñoz, A., Gillon, M., Guedel, M., Guterman, P., Hasiba, J., Heng, K., Hernandez, E., Kiss, L., Kuntzer, T., Laskar, J., Lecavelier des Etangs, A., Lovis, C., Magrin, D., Malvasio, L., Marafatto, L., Michaelis, H., Munari, M., Olofsson, G., Ottacher, H., Ottensamer, R., Pagano, I., Pallé, E., Peter, G., Piazza, D., Piotto, G., Pollacco, D., Ragazzoni, R., Rando, N., Ratti, F., Rauer, H., Ribas, I., Rieder, M., Rohlfs, R., Safa, F., Salatti, M., Ségransan, D., Simon, A. E., Smith, A. M. S., Sordet, M., Steller, M., Thomas, N., Tschentscher, M., Van Eylen, V., Viotto, V., Walter, I., Walton, N. A., Wildi, F. & Wolter, D., Feb 2021, In: Astronomy and Astrophysics. 646, 19 p., A157.

    Research output: Contribution to journalArticlepeer-review

  2. Size and structures of disks around very low mass stars in the Taurus star-forming region

    Kurtovic, N. T., Pinilla, P., Long, F., Benisty, M., Manara, C. F., Natta, A., Pascucci, I., Ricci, L., Scholz, A. & Testi, L., Jan 2021, In: Astronomy and Astrophysics. 645, 23 p., A139.

    Research output: Contribution to journalArticlepeer-review

  3. The VANDELS ESO public spectroscopic survey: Final data release of 2087 spectra and spectroscopic measurements

    Garilli, B., McLure, R., Pentericci, L., Franzetti, P., Gargiulo, A., Carnall, A., Cucciati, O., Iovino, A., Amorin, R., Bolzonella, M., Bongiorno, A., Castellano, M., Cimatti, A., Cirasuolo, M., Cullen, F., Dunlop, J., Elbaz, D., Finkelstein, S., Fontana, A., Fontanot, F. & 77 others, Fumana, M., Guaita, L., Hartley, W., Jarvis, M., Juneau, S., Maccagni, D., McLeod, D., Nandra, K., Pompei, E., Pozzetti, L., Scodeggio, M., Talia, M., Calabrò, A., Cresci, G., Fynbo, J. P. U., Hathi, N. P., Hibon, P., Koekemoer, A. M., Magliocchetti, M., Salvato, M., Vietri, G., Zamorani, G., Almaini, O., Balestra, I., Bardelli, S., Begley, R., Brammer, G., Bell, E. F., Bowler, R. A. A., Brusa, M., Buitrago, F., Caputi, C., Cassata, P., Charlot, S., Citro, A., Cristiani, S., Curtis-Lake, E., Dickinson, M., Fazio, G., Ferguson, H. C., Fiore, F., Franco, M., Georgakakis, A., Giavalisco, M., Grazian, A., Hamadouche, M., Jung, I., Kim, S., Khusanova, Y., Le Fèvre, O., Longhetti, M., Lotz, J., Mannucci, F., Maltby, D., Matsuoka, K., Mendez-Hernandez, H., Mendez-Abreu, J., Mignoli, M., Moresco, M., Nonino, M., Pannella, M., Papovich, C., Popesso, P., Roberts-Borsani, G., Rosario, D. J., Saldana-Lopez, A., Santini, P., Saxena, A., Schaerer, D., Schreiber, C., Stark, D., Tasca, L. A. M., Thomas, R., Vanzella, E., Wild, V., Williams, C. & Zucca, E., Mar 2021, In: Astronomy and Astrophysics. 647, 15 p., A150.

    Research output: Contribution to journalArticlepeer-review

  4. Three years of HARPS-N high-resolution spectroscopy and precise radial velocity data for the Sun

    Dumusque, X., Cretignier, M., Sosnowska, D., Buchschacher, N., Lovis, C., Phillips, D. F., Pepe, F., Alesina, F., Buchhave, L. A., Burnier, J., Cecconi, M., Cegla, H. M., Cloutier, R., Collier Cameron, A., Cosentino, R., Ghedina, A., González, M., Haywood, R. D., Latham, D. W., Lodi, M. & 18 others, López-Morales, M., Maldonado, J., Malavolta, L., Micela, G., Molinari, E., Mortier, A., Pérez Ventura, H., Pinamonti, M., Poretti, E., Rice, K., Riverol, L., Riverol, C., San Juan, J., Ségransan, D., Sozzetti, A., Thompson, S. J., Udry, S. & Wilson, T. G., 21 Apr 2021, In: Astronomy and Astrophysics. 648

    Research output: Contribution to journalArticlepeer-review

ID: 261287231

Top