54 citations · 639 across the 36 of their papers we have counts for
37 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…
Refinements to the Solar Polar Magnetic Flux: Implications from Inversion Methodologies
Bryan Yamashiro, Xudong Sun, Ivan Milić +6
The magnetic fields in the solar polar region are important to our understanding of the internal dynamo process, the global coronal structure, and the origin of the solar wind. The…
Chromospheric and photospheric properties of sunspots as inferred from Stokes inversions under magneto-hydrostatic and non-local-thermodynamic equilibrium
A. Vicente Arevalo, J. M. Borrero, I. Milic +3
Sunspots are crucial for exploring how magnetic fields and plasma flows interact in the solar atmosphere, spanning from the stable photosphere to the shock-dominated chromosphere.…
Synthesizing Sun-as-a-star flare spectra from high-resolution solar observations
M. De Wilde, A. G. M. Pietrow, M. K. Druett +22
Spatially resolved observations of the Sun and the astronomical sample size of stellar bodies are the respective key strengths of solar and stellar observations. However, the large…
The role of the Lorentz force in sunspot equilibrium
J. M. Borrero, A. Pastor Yabar, M. Schmassmann +3
Sunspots survive on the solar surface for time-scales ranging from days to months. This requires them to be in an equilibrium involving magnetic fields and hydrodynamic forces. Unf…
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…
Combining magneto-hydrostatic constraints with Stokes profile inversions. IV. Imposing condition
Juan M. Borrero, Adur Pastor Yabar, Basilio Ruiz Cobo
Inferences of the magnetic field in the solar atmosphere by means of spectropolarimetric inversions (i.e., Stokes inversion codes) yield magnetic fields that are non-solenoidal($\n…
A study of the capabilities for inferring atmospheric information from high-spatial-resolution simulations
C. Quintero Noda, E. Khomenko, M. Collados +8
In this work, we study the accuracy that can be achieved when inferring the atmospheric information from realistic numerical magneto-hydrodynamic simulations that reproduce the spa…
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…
Combining magneto-hydrostatic constraints with Stokes profiles inversions. III. Uncertainty in the inference of electric currents
J. M. Borrero, A. Pastor Yabar
Electric currents play an important role in the energy balance of the plasma in the solar atmosphere. They are also indicative of non-potential magnetic fields and magnetic reconne…
Polarimetric characterization of segmented mirrors
Adur Pastor Yabar, Andrés Asensio Ramos, Rafael Manso Sainz +1
We study the impact of the loss of axial symmetry around the optical axis on the polarimetric properties of a telescope with segmented primary mirror when each segment is present i…
Inference of electric currents in the solar photosphere
A. Pastor Yabar, J. M. Borrero, C. Quintero Noda +1
We aim at demonstrating the capabilities of a newly developed method for determining electric currents in the solar photosphere. We employ three-dimensional radiative magneto-hydro…
Improvement of the Helioseismic and Magnetic Imager (HMI) Vector Magnetic Field Inversion Code
Ana Belén Griñón-Marín, Adur Pastor Yabar, Yang Liu +2
A spectral line inversion code, Very Fast Inversion of the Stokes Vector (VFISV), has been used since May 2010 to infer the solar atmospheric parameters from the spectropolarimetri…
Long-Term Evolution of Three Light Bridges Developed on the Same Sunspot
Ana Belén Griñón-Marín, Adur Pastor Yabar, Rebecca Centeno +1
One important feature of sunspots is the presence of light bridges. These structures are elongated and bright (as compared to the umbra) features that seem to be related to the for…
Inference of the chromospheric magnetic field configuration of solar plage using the Ca II 8542 Å line
A. G. M. Pietrow, D. Kiselman, J. de la Cruz Rodríguez +3
It has so far proven impossible to reproduce all aspects of the solar plage chromosphere in quasi-realistic numerical models. The magnetic field configuration in the lower atmosphe…
Photospheric magnetic topology of a north polar region
A. Pastor Yabar, M. J. Martínez González, M. Collados
Aims. We aim to characterise the magnetism of a large fraction of the north polar region close to a maximum of activity, when the polar regions are reversing their dominant polarit…
Combining magneto-hydrostatic constraints with Stokes profiles inversions
J. M. Borrero, A. Pastor Yabar, M. Rempel +1
Inversion codes for the polarized radiative transfer equation can be used to infer the temperature , line-of-sight velocity , and magnetic field as a f…
FIRTEZ-dz: A Forward and Inverse solver of the polarized Radiative Transfer Equation under Zeeman regime in geometrical scale
A. Pastor Yabar, J. M. Borrero, B. Ruiz Cobo
We present a numerical code that solves the forward and inverse problem of the polarized radiative transfer equation in geometrical scale under the Zeeman regime. The code is fully…
Photospheric Magnetic Fields of the Trailing Sunspots in Active Region NOAA 12396
M. Verma, H. Balthasar, C. Denker +27
The solar magnetic field is responsible for all aspects of solar activity. Sunspots are the main manifestation of the ensuing solar activity. Combining high-resolution and synoptic…
Inference of magnetic fields in the very quiet Sun
M. J. Mart\' inez González, A. Pastor Yabar, A. Lagg +29
We present high-precision spectro-polarimetric data with high spatial resolution (0.4) of the very quiet Sun at 1.56m obtained with the GREGOR telescope to shed some light o…
Where are the solar magnetic poles?
A. Pastor Yabar, M. J. Martínez González, M. Collados
Regardless of the physical origin of stellar magnetic fields - fossil or dynamo induced - an inclination angle between the magnetic and rotation axes is very often observed. Absenc…
Magnetic topology of the north solar pole
A. Pastor Yabar, M. J. Martínez González, M. Collados
We study the polar magnetism near an activity maximum when these regions change their polarity, from which it is expected that its magnetism should be less affected by the global f…
Dissecting the long-term emission behaviour of the BL Lac object Mrk 421
M. I. Carnerero, C. M. Raiteri, M. Villata +4
We report on long-term multi-wavelength monitoring of blazar Mrk 421 by the GASP-WEBT collaboration and Steward Observatory, and by the Swift and Fermi satellites. We study the sou…