Suzana S. A. Silva
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View article: Recovering coherent flow structures in active regions using machine learning
Recovering coherent flow structures in active regions using machine learning Open
Analysing high-resolution solar atmospheric observations requires robust techniques to recover plasma flow features across different scales, especially in active regions. Current methodologies often fall short in capturing subgranular-scal…
View article: Poynting Flux of MHD Modes in Magnetic Solar Vortex Tubes
Poynting Flux of MHD Modes in Magnetic Solar Vortex Tubes Open
Magnetic flux tubes in the presence of background rotational flows, known as solar vortex tubes, are abundant throughout the solar atmosphere and may act as conduits for MHD waves to transport magnetic energy to the upper solar atmosphere.…
View article: Solar Vortex Tubes. III. Vorticity and Energy Transport
Solar Vortex Tubes. III. Vorticity and Energy Transport Open
This study investigated the mechanisms of vorticity generation and the role of vortex tubes in plasma heating and energy transport. Vortex tubes were identified using the instantaneous vorticity deviation technique in the MURaM data set of…
View article: Modeling the Effects of a Light Bridge on Properties of Magnetohydrodynamic Waves in Solar Pores
Modeling the Effects of a Light Bridge on Properties of Magnetohydrodynamic Waves in Solar Pores Open
Solar pores are ideal magnetic structures for wave propagation and transport of energy radially outwards across the upper layers of the solar atmosphere. We aim to model the excitation and propagation of magnetohydrodynamic waves in a pore…
View article: Poynting flux of MHD modes in magnetic solar vortex tubes
Poynting flux of MHD modes in magnetic solar vortex tubes Open
Magnetic flux tubes in the presence of background rotational flows, known as solar vortex tubes, are abundant throughout the solar atmosphere and may act as conduits for MHD waves to transport magnetic energy to the upper solar atmosphere.…
View article: Modeling the effects of a lightbridge on oscillations in a solar pore
Modeling the effects of a lightbridge on oscillations in a solar pore Open
Solar pores are ideal magnetic structures for wave propagation and transport of energy radially-outwards across the upper layers of the solar atmosphere. We aim to model the excitation and propagation of magnetohydrodynamic waves in a pore…
View article: Sausage, kink, and fluting magnetohydrodynamic wave modes identified in solar magnetic pores by Solar Orbiter/PHI
Sausage, kink, and fluting magnetohydrodynamic wave modes identified in solar magnetic pores by Solar Orbiter/PHI Open
Solar pores are intense concentrations of magnetic flux that emerge through the solar photosphere. When compared to sunspots, they are much smaller in diameter and can therefore be affected and buffeted by neighbouring granular activity to…
View article: Magnetohydrodynamic Poynting Flux Vortices in the Solar Atmosphere and Their Role in Concentrating Energy
Magnetohydrodynamic Poynting Flux Vortices in the Solar Atmosphere and Their Role in Concentrating Energy Open
The nature of energy generation, transport, and effective dissipation responsible for maintaining a hot solar upper atmosphere is still elusive. The Poynting flux is a vital parameter for describing the direction and magnitude of the energ…
View article: The Temporal and Spatial Evolution of Magnetohydrodynamic Wave Modes in Sunspots
The Temporal and Spatial Evolution of Magnetohydrodynamic Wave Modes in Sunspots Open
Through their lifetime, sunspots undergo a change in their area and shape and, as they decay, they fragment into smaller structures. Here, for the first time we analyze the spatial structure of the magnetohydrodynamic (MHD) slow-body and f…
View article: Advanced Γ Method for Small-scale Vortex Detection in the Solar Atmosphere
Advanced Γ Method for Small-scale Vortex Detection in the Solar Atmosphere Open
Ubiquitous vortical structures are considered to act as a natural source of various solar plasma phenomena, for example, a wide range of magnetohydrodynamic waves and jet excitations. This work aims to develop an advanced vortex detection …
View article: Novel Approach to Forecasting Photospheric Emergence of Active Regions
Novel Approach to Forecasting Photospheric Emergence of Active Regions Open
One key aspect of understanding the solar dynamo mechanism and the evolution of solar magnetism is to properly describe the emergence of solar active regions. In this Letter, we describe the Lagrangian photospheric flows dynamics during a …
View article: The effect of linear background rotational flows on magnetoacoustic modes of a photospheric magnetic flux tube
The effect of linear background rotational flows on magnetoacoustic modes of a photospheric magnetic flux tube Open
Magnetoacoustic waves in solar magnetic flux tubes may be affected by the presence of background rotational flows. Here, we investigate the behaviour of m = 0 and m = ±1 modes of a magnetic flux tube in the presence of linear background ro…
View article: The effect of linear background rotational flows on magnetoacoustic modes of a photospheric magnetic flux tube
The effect of linear background rotational flows on magnetoacoustic modes of a photospheric magnetic flux tube Open
Magnetoacoustic waves in solar magnetic flux tubes may be affected by the presence of background rotational flows. Here, we investigate the behaviour of $m=0$ and $m=\pm 1$ modes of a magnetic flux tube in the presence of linear background…
View article: Intensification of magnetic field in merging magnetic flux tubes driven by supergranular vortical flows
Intensification of magnetic field in merging magnetic flux tubes driven by supergranular vortical flows Open
The spatiotemporal dynamics of vorticity and magnetic field in the region of a photospheric vortex at a supergranular junction of the quiet Sun is studied, using Hinode’s continuum intensity images and longitudinal magnetograms. We show th…
View article: Reconstruction of Photospheric Velocity Fields from Highly Corrupted Data
Reconstruction of Photospheric Velocity Fields from Highly Corrupted Data Open
The analysis of the photospheric velocity field is essential for understanding plasma turbulence in the solar surface, which may be responsible for driving processes such as magnetic reconnection, flares, wave propagation, particle acceler…
View article: Reconstruction of photospheric velocity fields from highly corrupted\n data
Reconstruction of photospheric velocity fields from highly corrupted\n data Open
The analysis of the photospheric velocity field is essential for\nunderstanding plasma turbulence in the solar surface, which may be responsible\nfor driving processes such as magnetic reconnection, flares, wave propagation,\nparticle acce…
View article: Small-scale solar jet formation and their associated waves and instabilities
Small-scale solar jet formation and their associated waves and instabilities Open
Studies on small-scale jets' formation, propagation, evolution, and role, such as type I and II spicules, mottles, and fibrils in the lower solar atmosphere's energetic balance, have progressed tremendously thanks to the combination of det…
View article: The Importance of Horizontal Poynting Flux in the Solar Photosphere
The Importance of Horizontal Poynting Flux in the Solar Photosphere Open
The electromagnetic energy flux in the lower atmosphere of the Sun is a key tool to describe the energy balance of the solar atmosphere. Current investigations on energy flux in the solar atmosphere focus primarily on the vertical electrom…
View article: Magnetohydrodynamic Wave Mode Identification in Circular and Elliptical Sunspot Umbrae: Evidence for High-order Modes
Magnetohydrodynamic Wave Mode Identification in Circular and Elliptical Sunspot Umbrae: Evidence for High-order Modes Open
In this paper, we provide clear direct evidence of multiple concurrent higher-order magnetohydrodynamic (MHD) modes in circular and elliptical sunspots by applying both proper orthogonal decomposition (POD) and dynamic mode decomposition (…
View article: New Approach for Analyzing Dynamical Processes on the Surface of Photospheric Vortex Tubes
New Approach for Analyzing Dynamical Processes on the Surface of Photospheric Vortex Tubes Open
The majority of studies on multi-scale vortex motions employ a two-dimensional geometry by using a variety of observational and numerical data. This approach limits the understanding the nature of physical processes responsible for vortex …
View article: II. The effect of axisymmetric and spatially varying equilibria and flow on MHD wave modes: cylindrical geometry
II. The effect of axisymmetric and spatially varying equilibria and flow on MHD wave modes: cylindrical geometry Open
Magnetohydrodynamic (MHD) waves are routinely observed in the solar atmosphere. These waves are important in the context of solar physics as it is widely believed they can contribute to the energy budget of the solar atmosphere and are a p…
View article: Solar Vortex Tubes. II. On the Origin of Magnetic Vortices
Solar Vortex Tubes. II. On the Origin of Magnetic Vortices Open
The solar atmosphere presents a wealth of dynamics due to a constant interplay between the plasma flows and magnetic fields. Twisted flux tubes are an essential magnetic structure, believed to be driven by the rotational surface’s motions …
View article: Scalar field propagation in braneworld black hole scenario obtained from Nash theorem
Scalar field propagation in braneworld black hole scenario obtained from Nash theorem Open
We determine the scalar field evolution of a braneworld localized black hole with both dark matter and dark energy components, obtained within a dynamical and continuous embedding formalism by use of Nash’s theorem. We further extract the …
View article: Solar and Interplanetary Turbulence: Lagrangian Coherent Structures
Solar and Interplanetary Turbulence: Lagrangian Coherent Structures Open
<p>The dynamics of solar and interplanetary plasmas is governed by coherent structures such as current sheets and magnetic flux ropes which are responsible for the genesis of intermittent turbulence via magnetic reconnections in sola…
View article: Erratum: Supergranular turbulence in the quiet Sun: Lagrangian coherent structures
Erratum: Supergranular turbulence in the quiet Sun: Lagrangian coherent structures Open
SSAS acknowledges financial support from agency Coordenacao de aperfeicoamento de Pessoal de nivel Superior (CAPES 88882.316962/2019-01, Brazil). ELR acknowledges financial support from Conselho Nacional de Desenvolvimento Cientifico e Tec…
View article: Supergranular turbulence in the quiet Sun: Lagrangian coherent structures
Supergranular turbulence in the quiet Sun: Lagrangian coherent structures Open
The quiet Sun exhibits a wealth of magnetic activities that are fundamental for our understanding of solar magnetism. The magnetic fields in the quiet Sun are observed to evolve coherently, interacting with each other to form prominent str…
View article: Objective Lagrangian Vortex Detection in the Solar Photosphere
Objective Lagrangian Vortex Detection in the Solar Photosphere Open
Vortices in the solar photosphere can be linked to a wide range of events, such as small-scale solar eruptions, wave excitation, and heating of the upper part of the solar atmosphere. Despite their importance in solar physics, most of the …
View article: Nonlocal heat flux effects on temperature evolution of the solar atmosphere
Nonlocal heat flux effects on temperature evolution of the solar atmosphere Open
Context . Heat flux is one of the main energy transport mechanisms in the weakly collisional plasma of the solar corona. There, rare binary collisions let hot electrons travel over long distances and influence other regions along magnetic …