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ANGEO | Articles | Volume 37, issue 4
Ann. Geophys., 37, 603–612, 2019
https://doi.org/10.5194/angeo-37-603-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue: 7th Brazilian meeting on space geophysics and aeronomy

Ann. Geophys., 37, 603–612, 2019
https://doi.org/10.5194/angeo-37-603-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Regular paper 22 Jul 2019

Regular 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.
We describe a technique used to locate and classify critical points in 2-D flow fields at the...
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