244 citations · 2.3k across the 66 of their papers we have counts for
67 papers
Investigating the inferred spatiotemporal evolution of magnetic fields during an X1-class flare
Dimitri Arramy, Jaime de la Cruz Rodríguez, Adur Pastor Yabar +1
Several observational studies have reported sudden temporal changes in chromospheric magnetic fields inferred during solar flares using the weak-field approximation (WFA) and nonlo…
Chromospheric heating and magnetic topology above the shared penumbra of a delta-spot: Multi-line inversions and multi-height magnetic-field extrapolations
M. Kriginsky, J. Leenaarts, J. de la Cruz Rodríguez +1
We analysed observations of the Fe I 617.3 nm, Ca II 854.2 nm, and Ca II H lines obtained with CRISP and CHROMIS at the SST. Spatially coupled non-LTE inversions constrained the ch…
The IRIS inversion tool: recovering the radiative losses and the thermodynamics in the lower solar atmosphere
Alberto Sainz Dalda, Jaime de la Cruz Rodríguez, Viggo Hansteen +2
We introduce an improved and fast inversion tool that is able to provide the thermodynamics of the solar atmosphere from the photosphere to the top of the chromosphere, as well as…
Characterization of telecentric dual-etalon Fabry-Pérot systems from observational data. Properties of the CRISP2 instrument at the Swedish 1-m Solar Telescope
J. de la Cruz Rodríguez, G. B. Scharmer, P. Sütterlin +5
Imaging Fabry-Pérot Interferometer (FPI) observations are commonly used in solar physics to infer physical parameters in the photosphere and chromosphere through modeling of the ob…
The making of robust and highly performing imaging spectropolarimeters for large solar telescopes
G. B. Scharmer, J. de la Cruz Rodríguez, J. Leenaarts +7
We discuss the requirements, concepts, simulations, implementation, and calibration of two dual Fabry-Perot based imaging spectropolarimeters, CRISP and CHROMIS, at the Swedish 1-m…
Jacobian-Free Newton-Krylov method for multilevel NLTE radiative transfer problems
D. Arramy, J. de la Cruz Rodríguez, J. Leenaarts
The calculation of the emerging radiation from a model atmosphere requires knowledge of the emissivity and absorption coefficients, which are proportional to the atomic level popul…
One-dimensional, geometrically stratified semi-empirical models of the quiet-Sun photosphere and lower chromosphere
J. M. Borrero, I. Milic, A. Pastor Yabar +2
One-dimensional, semi-empirical models of the solar atmosphere are widely employed in numerous contexts within solar physics, ranging from the determination of element abundances a…
Improved reconstruction of solar magnetic fields from imaging spectropolarimetry through spatio-temporal regularisation
Jaime de la Cruz Rodríguez, Jorrit Leenaarts
Determination of solar magnetic fields with a spatial resolution set by the diffraction limit of a telescope is difficult because the time required to measure the Stokes vector wit…
Spatial resolution effects on the solar open flux estimates
Ivan Milic, Rebecca Centeno, Xudong Sun +2
Spectropolarimetric observations used to infer the solar magnetic fields are obtained with a limited spatial resolution. The effects of this limited resolution on the inference of…
Solar Atmospheric Heating Due to Small-scale Events in an Emerging Flux Region
Rahul Yadav, Maria D. Kazachenko, Andrey N. Afanasyev +2
We investigate the thermal, kinematic and magnetic structure of small-scale heating events in an emerging flux region (EFR). We use high-resolution multi-line observations (includi…
Designing wavelength sampling for Fabry-Pérot observations. Information-based spectral sampling
C. J. Díaz Baso, L. Rouppe van der Voort, J. de la Cruz Rodríguez +1
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 reconnection driven magnetic flux cancellation and a quiet Sun Ellerman bomb
Anjali. J. Kaithakkal, J. M. Borrero, A. Pastor Yabar +1
The focus of this investigation is to quantify the conversion of magnetic to thermal energy initiated by a quiet Sun cancellation event and to explore the resulting dynamics from t…
Decay of a photospheric transient filament at the boundary of a pore and the chromospheric response
Philip Lindner, Rolf Schlichenmaier, Nazaret Bello González +1
Intermediate stages between pores and sunspots are a rare phenomenon and can manifest with the formation of transient photospheric penumbral-like filaments. Although the magnetic f…
Does H Stokes~ profiles probe the chromospheric magnetic field? An observational perspective
Harsh Mathur, K. Nagaraju, Jayant Joshi +1
We investigated the diagnostic potential of the Stokes profile of the H line to probe the chromospheric line-of-sight (LOS) magnetic field () by comparing…
Ultra-high resolution observations of plasmoid-mediated magnetic reconnection in the deep solar atmosphere
L. Rouppe van der Voort, M. van Noort, J. de la Cruz Rodriguez
Magnetic reconnection in the deep solar atmosphere can give rise to enhanced emission in the Balmer hydrogen lines, a phenomenon referred to as Ellerman bombs. To effectively trace…
Estimating the longitudinal magnetic field in the chromosphere of quiet-Sun magnetic concentrations
S. Esteban Pozuelo, A. Asensio Ramos, J. de la Cruz Rodríguez +2
Details of the magnetic field in the quiet Sun chromosphere are key to our understanding of essential aspects of the solar atmosphere. We aim to determine the longitudinal magnetic…
Chromospheric Heating from Local Magnetic Growth and Ambipolar Diffusion Under Non-Equilibrium Conditions
Juan Martínez Sykora, Jaime de la Cruz Rodríguez, Milan Gošić +3
The heating of the chromosphere in internetwork regions remains one of the foremost open questions in solar physics. In the present study we tackle this old problem by using a very…
Transverse oscillations in 3D along Ca II K bright fibrils in the solar chromosphere
Sepideh Kianfar, Jorrit Leenaarts, Sara Esteban Pozuelo +3
Fibrils in the solar chromosphere carry transverse oscillations as determined from non-spectroscopic imaging data. They are estimated to carry an energy flux of several $\mathrm{kW…
Radiative losses in the chromosphere during a C-class flare
Rahul Yadav, J. de la Cruz Rodríguez, Graham S. Kerr +2
Solar flares release an enormous amount of energy into the corona. A substantial fraction of this energy is transported to the lower atmosphere, which results in chromospheric heat…
Spatio-temporal analysis of chromospheric heating in a plage region
R. Morosin, J. de la Cruz Rodríguez, C. J. Díaz Baso +1
Our knowledge of the heating mechanisms that are at work in the chromosphere of plage regions remains highly unconstrained from observational studies. The purpose of our study is t…
Physical properties of a fan-shaped jet backlit by an X9.3 flare
A. G. M. Pietrow, M. Druett, J. de la Cruz Rodriguez +2
Fan-shaped jets can be observed above light bridges and are driven by reconnection of the vertical umbral field with the more horizontal field above the light bridges. Because thes…
Active region chromospheric magnetic fields
G. J. M. Vissers, S. Danilovic, X. Zhu +5
Context. A proper estimate of the chromospheric magnetic fields is believed to improve modelling of both active region and coronal mass ejection evolution. Aims. We investigate the…
Bayesian Stokes inversion with Normalizing flows
C. J. Díaz Baso, A. Asensio Ramos, J. de la Cruz Rodríguez
Stokes inversion techniques are very powerful methods for obtaining information on the thermodynamic and magnetic properties of solar and stellar atmospheres. In recent years, very…
On the (mis)interpretation of the scattering polarization signatures in the Ca II 8542 A line through spectral line inversions
Rebecca Centeno, Jaime de la Cruz Rodriguez, Tanausu del Pino Aleman
Scattering polarization tends to dominate the linear polarization signals of the Ca II 8542 A line in weakly magnetized areas ( G), especially when the observing ge…