Detalles de publicación
PP 010023
Magnetic bright points in the quiet Sun
(1) Instituto de Astrofisica de Canarias, La Laguna, Tenerife, Spain
(2) Departamento de Astrofisica, Universidad de La Laguna, Tenerife, Spain
(3) ESA/ESTEC RSSD, Keplerlaan 1, 2200 AG Noordwijk, Netherlands
(4) Dipartimento di Fisica, Universita degli Studi di Roma Tor Vergata, Rome, Italy
We present a visual determination of the number of bright points (BPs)
existing in the quiet Sun, which are structures though to trace intense
kG magnetic concentrations. The measurement is based on a 0.1 arcsec
angular resolution G-band movie obtained with the Swedish Solar Telescope
at the solar disk center. We find 0.97 BPs/Mm^2, which is a factor three
larger than any previous estimate. It corresponds to 1.2 BPs per solar
granule. Depending on the details of the segmentation, the BPs cover
between 0.9% and 2.2% of the solar surface. Assuming their field
strength to be 1.5 kG, the detected BPs contribute to the solar magnetic
flux with an unsigned flux density between 13~G and 33~G. If network
and inter-network regions are counted separately, they contain
2.2 BPs/Mm^2 and 0.85 BPs/Mm^2, respectively.
existing in the quiet Sun, which are structures though to trace intense
kG magnetic concentrations. The measurement is based on a 0.1 arcsec
angular resolution G-band movie obtained with the Swedish Solar Telescope
at the solar disk center. We find 0.97 BPs/Mm^2, which is a factor three
larger than any previous estimate. It corresponds to 1.2 BPs per solar
granule. Depending on the details of the segmentation, the BPs cover
between 0.9% and 2.2% of the solar surface. Assuming their field
strength to be 1.5 kG, the detected BPs contribute to the solar magnetic
flux with an unsigned flux density between 13~G and 33~G. If network
and inter-network regions are counted separately, they contain
2.2 BPs/Mm^2 and 0.85 BPs/Mm^2, respectively.