88 citations · 436 across the 11 of their papers we have counts for
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Quiet Sun Magnetic Field Measurements Based on Lines with Hyperfine Structure
J. Sanchez Almeida, B. Viticchie, E. Landi Degl'Innocenti +1
The Zeeman pattern of MnI lines is sensitive to hyperfine structure (HFS) and, they respond to hG magnetic field strengths differently from the lines used in solar magnetometry. Th…
The Evershed effect observed with 0.2 arsec angular resolution
J. Sanchez Almeida, I. Marquez, J. A. Bonet +1
We present an analysis of the Evershed effect observed with a resolution of 0.2 arcsec. Using the new Swedish 1-m Solar Telescope and its Littrow spectrograph, we scan a significan…
Quiet Sun magnetic fields from simultaneous inversions of visible and infrared spectropolarimetric observations
Itahiza Dominguez Cerdena, Jorge Sanchez Almeida, Franz Kneer
We study the quiet Sun magnetic fields using spectropolarimetric observations of the infrared and visible Fe I lines at 6301.5, 6302.5, 15648 and 15653 A. Magnetic field strengths…
High-resolution proper motions in a sunspot penumbra
I. Marquez, J. Sanchez Almeida, J. A. Bonet
Local correlation tracking techniques are used to measure proper motions in a series of high angular resolution (~0.1 arcsec) penumbra images. If these motions trace true plasma mo…
Magnetic properties of photospheric regions having very low magnetic flux
H. Socas-Navarro, J. Sanchez Almeida
The magnetic properties of the quiet Sun are investigated using a novel inversion code, FATIMA, based on the Principal Component Analysis of the observed Stokes profiles. The stabi…