Bibcode
Cabello, I.; Domingo, V.; Bonet, J. A.; Blanco Rodríguez, J.; Balmaceda, L. A.
Referencia bibliográfica
Highlights of Spanish Astrophysics VII, Proceedings of the X Scientific Meeting of the Spanish Astronomical Society (SEA), held in Valencia, July 9 - 13, 2012, Eds.: J.C. Guirado, L.M. Lara, V. Quilis, and J. Gorgas., pp.805-805
Fecha de publicación:
5
2013
Número de citas
0
Número de citas referidas
0
Descripción
The study of small scale magnetic structures in the solar photosphere is
of great relevance for the understanding of the global behaviour of the
Sun. Because of the small spatial and temporal scales involved, the use
of high resolution images and fast cadence is fundamental for their
study. In order to obtain such images, sophisticated computational
techniques that compensate for the atmospheric degradation and telescope
aberration have been developed, improving in this way the spatial
resolution. In this work, we use G-band images obtained with the 1
m-Swedish Solar Telescope located at La Palma (Canary Islands, Spain).
The images have been restored with MOMFBD (Multi-Object Multi-Frame
Blind Deconvolution), a technique that combines multiple images acquired
in a short time interval. The resulting images have a resolution close
to the diffraction limit of the telescope (0.1 arcsec) allowing the
study of very small bright structures present in the inter-granular
lanes in the solar photosphere, known as Bright Points. It is
highlighted the great presence of magnetic structures in quiet Sun
regions analyzed from different observational campaigns. The density of
BPs in the quiet Sun shows a decrease as we approach the limb, with
values of ≃q 1% at the centre (μ ≈ 1), and ≃q 0.2% at
μ ≈ 0.3. We also present the discovery of small vortexes detected
in the solar surface through the movement of BPs, with radii around 241
km and lifetimes longer than 5 minutes. Further analyses, comprising
longer time series and information from different solar layers, are
being performed aiming at a more in-depth knowledge of these phenomena.