Patricio A. Muñoz
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View article: Small-scale Inhomogeneity Effects on Coherent Solar Radio Emission
Small-scale Inhomogeneity Effects on Coherent Solar Radio Emission Open
The coherent radio emission mechanism of solar radio bursts (SRBs) is one of the most complicated and controversial topics in solar physics. To clarify the mechanism(s) of different types of SRBs, (radio-) wave excitation by energetic elec…
View article: The Interplay Between Collisionless Magnetic Reconnection and Turbulence
The Interplay Between Collisionless Magnetic Reconnection and Turbulence Open
Alongside magnetic reconnection, turbulence is another fundamental nonlinear plasma phenomenon that plays a key role in energy transport and conversion in space and astrophysical plasmas. From a numerical, theoretical, and observational pe…
View article: Coherent Wave Excitation by Energetic Ring-beam Electrons in Inhomogeneous Solar Corona
Coherent Wave Excitation by Energetic Ring-beam Electrons in Inhomogeneous Solar Corona Open
Coherent radio emission mechanism of solar radio bursts is one of the most complicated and controversial topics in the solar physics. To clarify mechanism of different types of solar radio bursts, (radio) wave excitation by energetic elect…
View article: The Interplay Between Collisionless Magnetic Reconnection and Turbulence
The Interplay Between Collisionless Magnetic Reconnection and Turbulence Open
Alongside magnetic reconnection, turbulence is another fundamental nonlinear plasma phenomenon that plays a key role in energy transport and conversion in space and astrophysical plasmas. From a numerical, theoretical, and observational po…
View article: Poynting flux transport channels formed in polar cap regions of neutron star magnetospheres
Poynting flux transport channels formed in polar cap regions of neutron star magnetospheres Open
Context. Pair cascades in polar cap regions of neutron stars are considered to be an essential process in various models of coherent radio emissions of pulsars. The cascades produce pair plasma bunch discharges in quasi-periodic spark even…
View article: The Interplay Between Collisionless Magnetic Reconnection and Turbulence
The Interplay Between Collisionless Magnetic Reconnection and Turbulence Open
Alongside magnetic reconnection, turbulence is another fundamental nonlinear plasma phenomenon that plays a key role in energy transport and conversion in space and astrophysical plasmas. From a numerical, theoretical, and observational po…
View article: Streaming instability in neutron star magnetospheres: No indication of soliton-like waves
Streaming instability in neutron star magnetospheres: No indication of soliton-like waves Open
Context. Coherent radiation of pulsars, magnetars, and fast radio bursts could, in theory, be interpreted as radiation from solitons and soliton-like waves. Solitons are meant to contain a large number of electric charges confined on long …
View article: Poynting flux transport channels formed in polar cap regions of neutron star magnetospheres
Poynting flux transport channels formed in polar cap regions of neutron star magnetospheres Open
Context. Pair cascades in polar cap regions of neutron stars are considered to be an essential process in various models of coherentradio emissions of pulsars. The cascades produce pair plasma bunch discharges in quasi-periodic spark event…
View article: Streaming instability in neutron star magnetospheres: No indication of soliton-like waves
Streaming instability in neutron star magnetospheres: No indication of soliton-like waves Open
Coherent radiation of pulsars, magnetars, and fast radio bursts could, in theory, be interpreted as radiation from solitons and soliton-like waves. The solitons are meant to contain a large number of electric charges confined on long time-…
View article: Electron inertia effects in 3D hybrid-kinetic collisionless plasma turbulence
Electron inertia effects in 3D hybrid-kinetic collisionless plasma turbulence Open
The effects of the electron inertia on the current sheets that are formed out of kinetic turbulence are relevant to understand the importance of coherent structures in turbulence and the nature of turbulence at the dissipation scales. We i…
View article: Linear acceleration emission of pulsar relativistic streaming instability and interacting plasma bunches
Linear acceleration emission of pulsar relativistic streaming instability and interacting plasma bunches Open
Context. Linear acceleration emission is one of the mechanisms that might explain intense coherent emissions of radio pulsars. This mechanism is not well understood, however, because the effects of collective plasma response and nonlinear …
View article: Electron inertia effects in 3D hybrid-kinetic collisionless plasma turbulence
Electron inertia effects in 3D hybrid-kinetic collisionless plasma turbulence Open
The effects of the electron inertia on the current sheets that are formed out of kinetic turbulence are relevant to understand the importance of coherent structures in turbulence and the nature of turbulence at the dissipation scales. We i…
View article: Stability properties of a new anisotropic current sheet equilibrium for planetary magnetotails
Stability properties of a new anisotropic current sheet equilibrium for planetary magnetotails Open
Current sheets are the fundamental structures that store magnetic energy in astrophysical plasmas, such as planetary magnetospheres and solar flares. This free energy can then be explosively released by magnetic reconnection. This process …
View article: Proton and Helium Heating by Cascading Turbulence in a Low-beta Plasma
Proton and Helium Heating by Cascading Turbulence in a Low-beta Plasma Open
How ions are energized and heated is a fundamental problem in the study of energy dissipation in magnetized plasmas. In particular, the heating of heavy ions (including 4 He 2+ , 3 He 2+ , and others) has been a constant concern for unders…
View article: Wave Emission of Nonthermal Electron Beams Generated by Magnetic Reconnection
Wave Emission of Nonthermal Electron Beams Generated by Magnetic Reconnection Open
Magnetic reconnection in solar flares can efficiently generate nonthermal electron beams. The energetic electrons can, in turn, cause radio waves through microscopic plasma instabilities as they propagate through the ambient plasma along t…
View article: Hybrid-Kinetic Approach: Inertial Electrons
Hybrid-Kinetic Approach: Inertial Electrons Open
Hybrid-kinetic simulations describe ion-scale kinetic phenomena in space plasmas by considering ions kinetically, i.e. as particles, while electrons are modelled as a fluid. Most of the existing hybrid-kinetic codes neglect the electron ma…
View article: Importance of accurate consideration of the electron inertia in hybrid-kinetic simulations of collisionless plasma turbulence: The 2D limit
Importance of accurate consideration of the electron inertia in hybrid-kinetic simulations of collisionless plasma turbulence: The 2D limit Open
The dissipation mechanism of the magnetic energy in turbulent collisionless space and astrophysical plasmas is still not well understood. Its investigation requires efficient kinetic simulations of the energy transfer in collisionless plas…
View article: Importance of accurate numerical implementaion of electron inertial terms in hybrid-kinetic simulations  of collisionless plasma turbulence
Importance of accurate numerical implementaion of electron inertial terms in hybrid-kinetic simulations  of collisionless plasma turbulence Open
<p>A comprehensive understanding of the turbulent dissipation of magnetic energy in collisionless space and astrophysical plasmas, an unsolved problem yet, requires efficient kinetic simulations of collisionless plasma turbulence. Fu…
View article: Non-thermal electron velocity distribution functions due to 3D kinetic magnetic reconnection for solar coronal plasma conditions
Non-thermal electron velocity distribution functions due to 3D kinetic magnetic reconnection for solar coronal plasma conditions Open
Magnetic reconnection can convert magnetic energy into kinetic energy of non-thermal electron beams. Those accelerated electrons can, in turn, cause radio emission in astrophysical plasma environments, such as solar flares via micro-instab…
View article: Bunch Expansion as a Cause for Pulsar Radio Emissions
Bunch Expansion as a Cause for Pulsar Radio Emissions Open
Electromagnetic waves due to electron–positron clouds (bunches), created by cascading processes in pulsar magnetospheres, have been proposed to explain the pulsar radio emission. In order to verify this hypothesis, we utilized for the firs…
View article: Linear acceleration emission of pulsar relativistic streaming instability and interacting plasma bunches
Linear acceleration emission of pulsar relativistic streaming instability and interacting plasma bunches Open
Linear acceleration emission is one of the mechanisms that might explain intense coherent emissions of radio pulsars. This mechanism is not well understood, however, because the effects of collective plasma response and nonlinear plasma ev…
View article: Pulsar Coherent Radiation by Linear Acceleration Emission Mechanism
Pulsar Coherent Radiation by Linear Acceleration Emission Mechanism Open
Linear acceleration emission is one of the mechanisms proposed to explain the intense pulsar radio emissions. This mechanism is however not well understood due to a lack of its proper mathematical analyses, e.g., of the collective plasma r…
View article: Wave Excitation by Power-law-Distributed Energetic Electrons with Pitch-angle Anisotropy in the Solar Corona
Wave Excitation by Power-law-Distributed Energetic Electrons with Pitch-angle Anisotropy in the Solar Corona Open
Radio waves from the Sun are emitted, as a rule, due to energized electrons. Observations infer that the related energized electrons follow (negative) power-law velocity distributions above a break velocity U b . They might also distribute…
View article: Radio Emission by Soliton Formation in Relativistically Hot Streaming Pulsar Pair Plasmas
Radio Emission by Soliton Formation in Relativistically Hot Streaming Pulsar Pair Plasmas Open
A number of possible pulsar radio emission mechanisms are based on streaming instabilities in relativistically hot electron–positron pair plasmas. At saturation, the unstable waves can, in principle, form stable solitary waves, which could…
View article: Formation of electron velocity space distribution functions allowing radioastronomical diagnostics of kinetic magnetic reconnection
Formation of electron velocity space distribution functions allowing radioastronomical diagnostics of kinetic magnetic reconnection Open
Magnetic reconnection can convert magnetic energy into kinetic energy of non-thermal electron beams. We have now characterized the EVDFs generated by 3D kinetic magnetic reconnection obtained by numerical simulations utilizing the ACRONYM …
View article: Fully kinetic PIC simulations of particle acceleration and non-Maxwellian distribution functions due to current sheets in solar wind turbulence
Fully kinetic PIC simulations of particle acceleration and non-Maxwellian distribution functions due to current sheets in solar wind turbulence Open
<p>Turbulence is ubiquitous in solar system plasmas like those of the solar wind and Earth's magnetosheath. Current sheets can be formed out of this turbulence, and eventually magnetic reconnection can take place in them, a process t…
View article: Structure of current sheets formed in collisionless plasma turbulence
Structure of current sheets formed in collisionless plasma turbulence Open
<p>Plasma turbulence is ubiquitous in space and astrophysical environments and believed to play important role in a variety of space and astrophysical phenomena ranging from the entry of &#160;energetic particles in Earth's magne…
View article: Formation of non-thermal electron velocity distribution functions in kinetic magnetic reconnection
Formation of non-thermal electron velocity distribution functions in kinetic magnetic reconnection Open
<div> <div>Magnetic reconnection can convert magnetic energy into non-thermal particle energy in the form of electron beams. Those accelerated electrons can, in turn, cause radio emission in environments such as solar flares. T…
View article: Radio Emission by Soliton Formation in Hot Streaming Pair Pulsar Plasmas
Radio Emission by Soliton Formation in Hot Streaming Pair Pulsar Plasmas Open
A number of possible pulsar radio emission mechanisms is based on instabilities of the relative streaming and beams in their relativistic electron-positron pair plasma. At saturation the unstable waves can form, in principle, stable solita…
View article: Datasets for Constraining the Parameter Regime of Pulsar Radio Emission
Datasets for Constraining the Parameter Regime of Pulsar Radio Emission Open
The datasets support the figures in the paper Refining pulsar radio emission due to streaming instabilities: Linear theory and PIC simulations (figures \(2\) to \(7\)) and provide additional information discussed in Section \(5\) of the pa…