Skip to content

Research at St Andrews

Chromospheric and coronal heating and jet acceleration due to reconnection driven by flux cancellation: II. Cancellation of two magnetic polarities of unequal flux

Research output: Contribution to journalArticlepeer-review

Author(s)

P. Syntelis, E.R. Priest

School/Research organisations

Abstract

Context. Recent observations have shown that magnetic flux cancellation occurs at the photosphere more frequently than previously thought.

Aims. In order to understand the energy release by reconnection driven by flux cancellation, we previously studied a simple model of two cancelling polarities of equal flux. Here, we further develop our analysis to achieve a more general setup where the two cancelling polarities have unequal magnetic fluxes and where many new features are revealed.

Methods. We carried out an analytical study of the cancellation of two magnetic fragments of unequal and opposite flux that approach one another and are located in an overlying horizontal magnetic field.

Results. The energy release as microflares and nanoflares occurs in two main phases. During phase 1a, a separator is formed and reconnection is driven at it as it rises to a maximum height and then moves back down to the photosphere, heating the plasma and accelerating plasma jets in the process. During phase 1b, once the separator moves back to the photosphere, it bifurcates into two null points. Reconnection is no longer driven at the separator and an isolated magnetic domain connecting the two polarities is formed. During phase 2, the polarities cancel out at the photosphere as magnetic flux submerges below the photosphere and as reconnection occurs at and above the photosphere and plasma jets and a mini-filament eruption can be produced.
Close

Details

Original languageEnglish
Article numberA101
Number of pages12
JournalAstronomy and Astrophysics
Volume649
DOIs
Publication statusPublished - 21 May 2021

    Research areas

  • Methods: Analytical, Sun: Activity, Sun: Atmosphere, Sun: Chromosphere, Sun: Magnetic fields, Sun: Transition region

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

View graph of relations

Related by author

  1. Three-dimensional magnetic reconnection in astrophysical plasmas

    Li, T., Priest, E. & Guo, R., 26 May 2021, In: Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences. 477, 2249, 39 p., 20200949.

    Research output: Contribution to journalReview articlepeer-review

  2. From formation to disruption: observing the multiphase evolution of a solar flare current sheet

    Chitta, L. P., Priest, E. R. & Cheng, X., 27 Apr 2021, In: Astrophysical Journal. 911, 2, 12 p., 133.

    Research output: Contribution to journalArticlepeer-review

  3. Impulsive coronal heating during the interaction of surface magnetic fields in the lower solar atmosphere

    Chitta, L. P., Peter, H., Priest, E. R. & Solanki, S. K., Dec 2020, In: Astronomy & Astrophysics. 644, 29 p., A130.

    Research output: Contribution to journalArticlepeer-review

  4. Coronal mini-jets in an activated solar tornado-like prominence

    Chen, H., Zhang, J., De Pontieu, B., Ma, S., Kliem, B. & Priest, E., 10 Aug 2020, In: Astrophysical Journal. 899, 1, 13 p., 19.

    Research output: Contribution to journalArticlepeer-review

Related by journal

  1. Determining the source and eruption dynamics of a stealth CME using NLFFF modelling and MHD simulations

    Yardley, S. L., Pagano, P., Mackay, D. H. & Upton, L., 28 Jun 2021, (Accepted/In press) In: Astronomy & Astrophysics.

    Research output: Contribution to journalArticlepeer-review

  2. An ultra-short-period transiting super-Earth orbiting the M3 dwarf TOI-1685

    Bluhm, P., Palle, E., Molaverdikhani, K., Kemmer, J., Hatzes, A. P., Kossakowski, D., Stock, S., Caballero, J. A., Lillo-Box, J., Bejar, V. J. S. ., Soto, M. G., Amado, P. J., Brown, P., Cadieux, C., Cloutier, R., Collins, K. A., Collins, K. I., Cortes-Contreras, M., Doyon, R., Dreizler, S. & 34 others, Espinoza, N., Fukui, A., Gonzalez-Alvarez, E., Henning, T., Horne, K., Jeffers, S. V., Jenkins, J. M., Jensen, E. L. N., Kaminski, A., Kielkopf, J. F., Kusakabe, N., Kuerster, M., Lafreniere, D., Luque, R., Murgas, F., Montes, D., Morales, J. C., Narita, N., Passegger, V. M., Quirrenbach, A., Schoefer, P., Reffert, S., Reiners, A., Ribas, I., Ricker, G. R., Seager, S., Schweitzer, A., Schwarz, R. P., Tamura, M., Trifonov, T., Vanderspek, R., Winn, J., Zechmeister, M. & Zapatero Osorio, M. R., 8 Jun 2021, In: Astronomy and Astrophysics. 650, 17 p., A78.

    Research output: Contribution to journalArticlepeer-review

  3. A fast multi-dimensional magnetohydrodynamic formulation of the transition region adaptive conduction (TRAC) method

    Johnston, C. D., Hood, A. W., De Moortel, I., Pagano, P. & Howson, T. A., 1 Jun 2021, (Accepted/In press) In: Astronomy & Astrophysics.

    Research output: Contribution to journalArticlepeer-review

  4. A search for transiting planets around hot subdwarfs: I. Methods and performance tests on light curves from Kepler, K2, TESS, and CHEOPS

    Van Grootel, V., Pozuelos, F. J., Thuillier, A., Charpinet, S., Delrez, L., Beck, M., Fortier, A., Hoyer, S., Sousa, S. G., Barlow, B. N., Billot, N., Dévora-Pajares, M., Østensen, R. H., Alibert, Y., Alonso, R., Anglada Escudé, G., Asquier, J., Barrado, D., Barros, S. C. C., Baumjohann, W. & 62 others, Beck, T., Bekkelien, A., Benz, W., Bonfils, X., Brandeker, A., Broeg, C., Bruno, G., Bárczy, T., Cabrera, J., Cameron, A. C., Charnoz, S., Davies, M. B., Deleuil, M., Demangeon, O. D. S., Demory, B-O., Ehrenreich, D., Erikson, A., Fossati, L., Fridlund, M., Futyan, D., Gandolfi, D., Gillon, M., Guedel, M., Heng, K., Isaak, K. G., Kiss, L., Laskar, J., Lecavelier Des Etangs, A., Lendl, M., Lovis, C., Magrin, D., Maxted, P. F. L., Mecina, M., Mustill, A. J., Nascimbeni, V., Olofsson, G., Ottensamer, R., Pagano, I., Pallé, E., Peter, G., Piotto, G., Plesseria, J-Y., Pollacco, D., Queloz, D., Ragazzoni, R., Rando, N., Rauer, H., Ribas, I., Santos, N. C., Scandariato, G., Ségransan, D., Silvotti, R., Simon, A. E., Smith, A. M. S., Steller, M., Szabó, G. M., Thomas, N., Udry, S., Viotto, V., Walton, N. A., Westerdorff, K. & Wilson, T. G., Jun 2021, In: Astronomy and Astrophysics. 650, 19 p., A205.

    Research output: Contribution to journalArticlepeer-review

  5. New low-mass members of Chamaeleon I and ϵ Cha

    Kubiak, K., Mužić, K., Sousa, I., Almendros-Abad, V., Köhler, R. & Scholz, A., Jun 2021, In: Astronomy and Astrophysics. 650, 17 p., A48.

    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

ID: 274588733

Top