The diagnostic method proposed by Landi Degl'Innocenti and Landolfi (1982), based on the observation of circular polarization, has been generalized to derive...
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PublicaciónNumerical test of a new v-profile inversion technique
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NoticiaObservan el calentamiento producido por ondas magnéticas en el Sol
Un equipo internacional en el que participan investigadores del Instituto de Astrofísica de Canarias (IAC) y la Universidad de La Laguna (ULL), observa cómo las...
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PublicaciónObservation and interpretation of the asymmetric Stokes Q, U, and V line profiles in sunspots
We present a first approach to systematic characterization and interpretation of observed asymmetries of Stokes profiles as a function of spatial position...
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PublicaciónObservations of the phase differences between irradiances and velocity for low-degree solar acoustic modes
Irradiance measurements from the IPHIR instrument flown on the Phobos 2 mission to Mars are used to derive phase differences and gains between broadband...
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PublicaciónObserved differences between large and small sunspots
We confirm recent results about the differences in temperature and magnetic field strength between the umbra of large and small sunspots. Five Stokes I- and V...
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PublicaciónOn the Formation of Lyman β and the O I 1027 and 1028 Å Spectral Lines
We study the potential of Lyman β and the O I 1027 and 1028 Å spectral lines to help in understanding the properties of the chromosphere and transition region...
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PublicaciónOn the Magnetic Nature of Quiet-Sun Chromospheric Grains
Ca II K grains, i.e., intermittent, short-lived (about 1 minute), periodic (2-4 minutes), pointlike chromospheric brightenings, are considered to be the...
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PublicaciónOn the photospheric temperature in small-scale magnetic flux concentrations
Results are presented of 2D radiative transfer calculations performed for geometric configurations that simulate partly evacuated small-scale magnetic flux...
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PublicaciónOn the relation between the intensities of bright features and the local background in sunspot umbrae
A photometric study of umbral bright features (umbral dots, clusters of umbral dots, bright grains of light bridges) in sunspots is presented. It is based on...