C. J. Díaz Baso
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View article: Thermodynamic and magnetic evolution of an eruptive C-class solar flare observed with SST/TRIPPEL-SP
Thermodynamic and magnetic evolution of an eruptive C-class solar flare observed with SST/TRIPPEL-SP Open
Solar flares are complex phenomena driven by the release of magnetic energy, but a large energy reservoir is not sufficient to determine their eruptive potential; the magnetic topology and plasma dynamics play a key role. We investigate th…
View article: torchmfbd: A flexible multi-object, multi-frame blind deconvolution code
torchmfbd: A flexible multi-object, multi-frame blind deconvolution code Open
Context . Post-facto image restoration techniques are essential for improving the quality of ground-based astronomical observations, which are affected by atmospheric turbulence. Multi-object, multi-frame blind deconvolution (MOMFBD) metho…
View article: High flow speeds and transition-region like temperatures in the solar chromosphere during flux emergence
High flow speeds and transition-region like temperatures in the solar chromosphere during flux emergence Open
Context: Flux emergence in the solar atmosphere is a complex process that causes a release of magnetic energy as heat and acceleration of solar plasma at a variety of spatial scales. Methods: We analysed imaging spectropolarimetric data ta…
View article: Coronal kink oscillations and photospheric driving: combining SolO/EUI and SST/CRISP high-resolution observations
Coronal kink oscillations and photospheric driving: combining SolO/EUI and SST/CRISP high-resolution observations Open
The driving and excitation mechanisms of decay-less kink oscillations in coronal loops remain under debate. We aim to quantify and provide simple observational constraints on the photospheric driving of oscillating coronal loops in a few t…
View article: Spectral resolution effects on the information content in solar spectra
Spectral resolution effects on the information content in solar spectra Open
When interpreting spectropolarimetric observations of the solar atmosphere, wavelength variations of the emergent intensity and polarization translate into information on the depth stratification of physical parameters. We aim to quantify …
View article: Exploring spectropolarimetric inversions using neural fields. Solar chromospheric magnetic field under the weak-field approximation
Exploring spectropolarimetric inversions using neural fields. Solar chromospheric magnetic field under the weak-field approximation Open
Full-Stokes polarimetric datasets, originating from slit-spectrograph or narrow-band filtergrams, are routinely acquired nowadays. The data rate is increasing with the advent of bi-dimensional spectropolarimeters and observing techniques t…
View article: Properties of sunspot light bridges on a geometric height scale
Properties of sunspot light bridges on a geometric height scale Open
Investigating light bridges (LBs) helps us comprehend key aspects of sunspots. However, few studies have analyzed the properties of LBs in terms of the geometric height, which is a more realistic perspective given the corrugation of the so…
View article: Properties of sunspot light bridges on a geometric height scale
Properties of sunspot light bridges on a geometric height scale Open
Context. Investigating light bridges (LBs) helps us comprehend key aspects of sunspots. However, few studies have analyzed the properties of LBs in terms of the geometric height, which is a more realistic perspective given the corrugation …
View article: Designing wavelength sampling for Fabry–Pérot observations
Designing wavelength sampling for Fabry–Pérot observations Open
Context. Fabry–Pérot interferometers (FPIs) have become very popular in solar observations because they offer a balance between cadence, spatial resolution, and spectral resolution through a careful design of the spectral sampling scheme a…
View article: Designing wavelength sampling for Fabry-Pérot observations. Information-based spectral sampling
Designing wavelength sampling for Fabry-Pérot observations. Information-based spectral sampling Open
Fabry-Pérot interferometers (FPIs) have become very popular in solar observations because they offer a balance between cadence, spatial resolution, and spectral resolution through a careful design of the spectral sampling scheme according …
View article: Center-to-limb variation of spectral lines and continua observed with SST/CRISP and SST/CHROMIS
Center-to-limb variation of spectral lines and continua observed with SST/CRISP and SST/CHROMIS Open
Context. Observations of center-to-limb variations (CLVs) of spectral lines and continua provide a good test for the accuracy of models with a solar and stellar atmospheric structure and spectral line formation. They are also widely used t…
View article: Center-to-limb variation of spectral lines and continua observed with SST/CRISP and SST/CHROMIS
Center-to-limb variation of spectral lines and continua observed with SST/CRISP and SST/CHROMIS Open
Observations of center-to-limb variations (CLV) of spectral lines and continua provide a good test for the accuracy of models of solar and stellar atmospheric structure and spectral-line formation. They are also widely used to constrain el…
View article: The European Solar Telescope
The European Solar Telescope Open
The European Solar Telescope (EST) is a project aimed at studying the magnetic connectivity of the solar atmosphere, from the deep photosphere to the upper chromosphere. Its design combines the knowledge and expertise gathered by the Europ…
View article: Radiative losses in the chromosphere during a C-class flare
Radiative losses in the chromosphere during a C-class flare Open
Context. Solar flares release an enormous amount of energy (∼10 32 erg) into the corona. A substantial fraction of this energy is transported to the lower atmosphere, which results in chromospheric heating. The mechanisms that transport en…
View article: Active region chromospheric magnetic fields
Active region chromospheric magnetic fields Open
Context. A proper estimate of the chromospheric magnetic fields is thought to improve modelling of both active region and coronal mass ejection evolution. However, because the chromospheric field is not regularly obtained for sufficiently …
View article: Bayesian Stokes inversion with normalizing flows
Bayesian Stokes inversion with normalizing flows Open
Stokes inversion techniques are very powerful methods for obtaining information on the thermodynamic and magnetic properties of solar and stellar atmospheres. In recent years, highly sophisticated inversion codes have been developed that a…
View article: Approximate Bayesian neural Doppler imaging
Approximate Bayesian neural Doppler imaging Open
Aims. The non-uniform surface temperature distribution of rotating active stars is routinely mapped with the Doppler imaging technique. Inhomogeneities in the surface produce features in high-resolution spectroscopic observations that shif…
View article: Stratification of physical parameters in a C-class solar flare using multiline observations
Stratification of physical parameters in a C-class solar flare using multiline observations Open
We present high-resolution and multiline observations of a C2-class solar flare (SOL2019-05-06T08:47), which occurred in NOAA AR 12740 on May 6, 2019. The rise, peak, and decay phases of the flare were recorded continuously and quasi-simul…
View article: An observationally constrained model of strong magnetic reconnection in the solar chromosphere
An observationally constrained model of strong magnetic reconnection in the solar chromosphere Open
Context. The evolution of the photospheric magnetic field plays a key role in the energy transport into the chromosphere and the corona. In active regions, newly emerging magnetic flux interacts with the pre-existent magnetic field, which …
View article: An observationally-constrained model of strong magnetic reconnection in the solar chromosphere. Atmospheric stratification and estimates of heating rates
An observationally-constrained model of strong magnetic reconnection in the solar chromosphere. Atmospheric stratification and estimates of heating rates Open
The evolution of the photospheric magnetic field plays a key role in the energy transport into the chromosphere and the corona. In active regions, newly emerging magnetic flux interacts with the pre-existent magnetic field, which can lead …
View article: Non-LTE inversions of a confined X2.2 flare
Non-LTE inversions of a confined X2.2 flare Open
Context. Obtaining an accurate measurement of magnetic field vector in the solar atmosphere is essential for studying changes in field topology during flares and reliably modelling space weather. Aims. We tackle this problem by applying va…
View article: Non-LTE inversions of a confined X2.2 flare: I. Vector magnetic field in the photosphere and chromosphere
Non-LTE inversions of a confined X2.2 flare: I. Vector magnetic field in the photosphere and chromosphere Open
Obtaining the magnetic field vector accurately in the solar atmosphere is essential for studying changes in field topology during flares and to reliably model space weather. We tackle this problem by applying various inversion methods to a…
View article: Solar image denoising with convolutional neural networks
Solar image denoising with convolutional neural networks Open
The topology and dynamics of the solar chromosphere are greatly affected by the presence of magnetic fields. The magnetic field can be inferred by analyzing polarimetric observations of spectral lines. Polarimetric signals induced by chrom…
View article: Spectropolarimetric analysis of an active region filament
Spectropolarimetric analysis of an active region filament Open
Aims . The determination of the magnetic filed vector in solar filaments is made possible by interpreting the Hanle and Zeeman effects in suitable chromospheric spectral lines like those of the He I multiplet at 10 830 Å. We study the vect…
View article: Spectropolarimetric analysis of an active region filament.
Spectropolarimetric analysis of an active region filament. Open
Aims . Our aim is to demonstrate the limitations of using a single-component model to study the magnetic field of an active region filament. To do this, we analyzed the polarimetric signals of the He I 10830 Å multiplet, which were acquire…
View article: Spectropolarimetric analysis of an active region filament. II. Evidence of the limitations of a single component model
Spectropolarimetric analysis of an active region filament. II. Evidence of the limitations of a single component model Open
Our aim is to demonstrate the limitations of using a single component model to study the magnetic field of an active region filament. For that we have analyzed the polarimetric signals of the He I 10830 A multiplet acquired with the infrar…
View article: Spectropolarimetric analysis of an active region filament. I. Magnetic and dynamical properties from single component inversions
Spectropolarimetric analysis of an active region filament. I. Magnetic and dynamical properties from single component inversions Open
The determination of the magnetic filed vector in solar filaments is possible by interpreting the Hanle and Zeeman effects in suitable chromospheric spectral lines like those of the He I multiplet at 10830 A. We study the vector magnetic f…