Articles | Volume 37, issue 4
https://doi.org/10.5194/angeo-37-603-2019
https://doi.org/10.5194/angeo-37-603-2019
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22 Jul 2019
Regular paper | Highlight paper |  | 22 Jul 2019

Converging photospheric vortex flows close to the polarity inversion line of a fully emerged active region

Jean C. Santos and Cristiano M. Wrasse

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Cited articles

Attie, R., Innes, D. E., and Potts, H. E.: Evidence of photospheric vortex flows at supergranular junctions observed by FG/SOT (Hinode), Astron. Astrophys., 493, L13–L16, https://doi.org/10.1051/0004-6361:200811258, 2009. a
Balmaceda, L., Vargas Domínguez, S., Palacios, J., Cabello, I., and Domingo, V.: Evidence of small-scale magnetic concentrations dragged by vortex motion of solar photospheric plasma, Astron. Astrophys., 513, L6, https://doi.org/10.1051/0004-6361/200913584, 2010. a
Bi, Y., Jiang, Y., Yang, J., Hong, J., Li, H., Yang, B., and Xu, Z.: Observation of a reversal of rotation in a sunspot during a solar flare, Nat. Commun., 7, 13798, https://doi.org/10.1038/ncomms13798, 2016. a
Bonet, J. A., Márquez, I., Sánchez Almeida, J., Cabello, I., and Domingo, V.: Convectively Driven Vortex Flows in the Sun, Astrophys. J., 687, L131, https://doi.org/10.1086/593329, 2008. a
Bonet, J. A., Márquez, I., Sánchez Almeida, J., Palacios, J., Martínez Pillet, V., Solanki, S. K., del Toro Iniesta, J. C., Domingo, V., Berkefeld, T., Schmidt, W., Gandorfer, A., Barthol, P., and Knölker, M.: SUNRISE/IMaX Observations of Convectively Driven Vortex Flows in the Sun, Astrophys. J., 723, L139–L143, https://doi.org/10.1088/2041-8205/723/2/L139, 2010. a
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We describe a technique used to locate and classify critical points in 2-D flow fields at the solar photosphere obtained from the evolution of the line-of-sight magnetic field in a region close to the magnetic polarity inversion line of a fully emerged active region. We apply this technique to locate a particular kind of critical point associated to vortex flows, which are considered important, since they can twist and interweave the foot points of flux tubes and generate magnetic reconnection.