Search for torsional oscillations in isolated sunspots

Bibcode
2017A&A...604A..36G
DOI
10.1051/0004-6361/201628187
Griñón-Marín, A. B.; Socas-Navarro, H.; Centeno, R.
Referencia bibliográfica

Astronomy and Astrophysics, Volume 604, id.A36, 8 pp.

Fecha de publicación:
7
2017
Revista
Astronomy and Astrophysics
Número de autores
3
Número de autores del IAC
2
Número de citas
2
Número de citas referidas
2
Descripción
In this work we seek evidence for global torsional oscillations in alpha sunspots. We have used long time series of continuum intensity and magnetic field vector maps from the Helioseismic and Magnetic Imager (HMI) instrument on board the Solar Dynamics Observatory (SDO) spacecraft. The time series analysed here span the total disk passage of 25 isolated sunspots. We found no evidence of global long-term periodic oscillations in the azimuthal angle of the sunspot magnetic field within 1 degree. This study could help us to understand the sunspot dynamics and its internal structure.
Proyectos relacionados
Project Image
Magnetismo, Polarización y Transferencia Radiativa en Astrofísica
Los campos magnéticos están presentes en todos los plasmas astrofísicos y controlan la mayor parte de la variabilidad que se observa en el Universo a escalas temporales intermedias. Se encuentran en estrellas, a lo largo de todo el diagrama de Hertzsprung-Russell, en galaxias, e incluso quizás en el medio intergaláctico. La polarización de la luz
Ernest
Alsina Ballester
En ejecución
Tipo
Con árbitro
Física Solar (FS)
Manchas solares
Campos magnéticos

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