J. E. Leake
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View article: Self-Consistent Heating of the Magnetically Closed Solar Corona: Generation of Nanoflares, Thermodynamic Response of the Plasma and Observational Signatures
Self-Consistent Heating of the Magnetically Closed Solar Corona: Generation of Nanoflares, Thermodynamic Response of the Plasma and Observational Signatures Open
The energy that heats the magnetically closed solar corona originates in the complex motions of the massive photosphere. Turbulent photospheric convection slowly displaces the footpoints of coronal field lines, causing them to become twist…
View article: The Onset of Magnetic Reconnection in Dynamically Evolving Current Sheets
The Onset of Magnetic Reconnection in Dynamically Evolving Current Sheets Open
We present the first results of three-dimensional (3D) numerical magnetohydrodynamic (MHD) simulations of the onset of magnetic reconnection via the tearing instability in dynamically thinning current sheets in the solar corona. In all our…
View article: Solar Eruptions Triggered by Flux Emergence Below or Near a Coronal Flux Rope
Solar Eruptions Triggered by Flux Emergence Below or Near a Coronal Flux Rope Open
Observations have shown a clear association of filament/prominence eruptions with the emergence of magnetic flux in or near filament channels. Magnetohydrodynamic (MHD) simulations have been employed to systematically study the conditions …
View article: Solar Eruptions Triggered by Flux Emergence below or near a Coronal Flux Rope
Solar Eruptions Triggered by Flux Emergence below or near a Coronal Flux Rope Open
Observations have shown a clear association of filament/prominence eruptions with the emergence of magnetic flux in or near filament channels. Magnetohydrodynamic (MHD) simulations have been employed to systematically study the conditions …
View article: Solar Eruptions Triggered by Flux Emergence Below or Near a Coronal Flux Rope
Solar Eruptions Triggered by Flux Emergence Below or Near a Coronal Flux Rope Open
Observations have shown a clear association of filament/prominence eruptions with the emergence of magnetic flux in or near filament channels. Magnetohydrodynamic (MHD) simulations have been employed to systematically study the conditions …
View article: Simulating the photospheric to coronal plasma using magnetohydrodyanamic characteristics I: data-driven boundary conditions
Simulating the photospheric to coronal plasma using magnetohydrodyanamic characteristics I: data-driven boundary conditions Open
We develop a general description of how information propagates through a magnetohydrodynamic (MHD) system based on the method of characteristics and use that to formulate numerical boundary conditions (BCs) that are intrinsically consisten…
View article: The Multiview Observatory for Solar Terrestrial Science (MOST)
The Multiview Observatory for Solar Terrestrial Science (MOST) Open
Whitepaper #138 in the Decadal Survey for Solar and Space Physics (Heliophysics) 2024-2033. Main topics: basic research; infrastructure/workforce/other programmatic. Additional topics: solar physics; state of the profession; space-based mi…
View article: Heating of the Magnetically Closed Corona and Physical Models of Solar and Stellar Spectral Irradiances
Heating of the Magnetically Closed Corona and Physical Models of Solar and Stellar Spectral Irradiances Open
Whitepaper #209 in the Decadal Survey for Solar and Space Physics (Heliophysics) 2024-2033. Main topics: space weather applications; basic research. Additional topics: space weather research/applications/operations pipeline; solar physics;…
View article: Enabling data-driven modeling and real-time prediction of the dynamic solar atmosphere
Enabling data-driven modeling and real-time prediction of the dynamic solar atmosphere Open
Cutting edge research of the region between the solar photosphere and Alfvén surface, where the solar wind disconnects from the solar surface, increasingly relies on largescale computational modeling.This is true not just for numerical exp…
View article: The Thickness of Electric Current Sheets and Implications for Coronal Heating
The Thickness of Electric Current Sheets and Implications for Coronal Heating Open
The thickness of current sheets is extremely important, especially as it relates to the onset of fast magnetic reconnection. Onset determines how much magnetic free energy can build up in a field before it is explosively released. This has…
View article: Recent progress on understanding coronal mass ejection/flare onset by a NASA living with a star focused science team
Recent progress on understanding coronal mass ejection/flare onset by a NASA living with a star focused science team Open
We present a report of recent progress on the topic of understanding solar coronal mass ejection (CME) onset from both modeling and observational viewpoints, as carried out from 2019 to the present by the NASA Living with a Star Focused Sc…
View article: Reconstructing Extreme Space Weather from Planet Hosting Stars
Reconstructing Extreme Space Weather from Planet Hosting Stars Open
The field of exoplanetary science is making rapid progress both in statistical studies of exoplanet properties as well as in individual characterization. As space missions provide an emerging picture of formation and evolution of exoplanet…
View article: Exploring Extreme Space Weather Factors of Exoplanetary Habitability
Exploring Extreme Space Weather Factors of Exoplanetary Habitability Open
It is currently unknown how common life is on exoplanets, or how long planets can remain viable for life. To date, we have a superficial notion of habitability, a necessary first step, but so far lacking an understanding of the detailed in…
View article: Field distribution of magnetograms from simulations of active region formation
Field distribution of magnetograms from simulations of active region formation Open
International audience
View article: Testing predictors of eruptivity using parametric flux emergence simulations
Testing predictors of eruptivity using parametric flux emergence simulations Open
Solar flares and coronal mass ejections (CMEs) are among the most energetic events in the solar system, impacting the near-Earth environment. Flare productivity is empirically known to be correlated with the size and complexity of active r…
View article: Magnetic Flux Emergence and Decay Rates for Preceder and Follower Sunspots Observed with HMI
Magnetic Flux Emergence and Decay Rates for Preceder and Follower Sunspots Observed with HMI Open
We quantify the emergence and decay rates of preceder ( p ) and follower ( f ) sunspots within 10 active regions from 2010 to 2014 using Space-weather Helioseismic Magnetic Imager Active Region Patch data. The sunspots are small to mid-siz…
View article: Testing the Accuracy of Data-driven MHD Simulations of Active Region Evolution
Testing the Accuracy of Data-driven MHD Simulations of Active Region Evolution Open
Models for the evolution of the solar coronal magnetic field are vital for understanding solar activity, yet the best measurements of the magnetic field lie at the photosphere, necessitating the development of coronal models which are “dat…
View article: Science Objective: Understanding Energy Transport by Alfvénic Waves in Solar Flares
Science Objective: Understanding Energy Transport by Alfvénic Waves in Solar Flares Open
Solar flares are driven by the release of magnetic energy from reconnection events in the solar corona, whereafter energy is transported to the chromosphere, heating the plasma and causing the characteristic radiative losses. In the collis…
View article: Testing predictors of eruptivity using parametric flux emergence simulations
Testing predictors of eruptivity using parametric flux emergence simulations Open
Solar flares and coronal mass ejections (CMEs) are among the most energetic events in the solar system, impacting the near-Earth environment. Flare productivity is empirically known to be correlated with the size and complexity of active r…
View article: SUNQUAKE GENERATION BY CORONAL MAGNETIC RESTRUCTURING
SUNQUAKE GENERATION BY CORONAL MAGNETIC RESTRUCTURING Open
Sunquakes are the surface signatures of acoustic waves in the Sun’s interior that are produced by some but not all flares and coronal mass ejections (CMEs). This paper explores a mechanism for sunquake generation by the changes in magnetic…
View article: THE CONTRIBUTION OF CORONAL JETS TO THE SOLAR WIND
THE CONTRIBUTION OF CORONAL JETS TO THE SOLAR WIND Open
Transient collimated plasma eruptions in the solar corona, commonly known as coronal (or X-ray) jets, are among the most interesting manifestations of solar activity. It has been suggested that these events contribute to the mass and energ…
View article: Sunquake Generation by Coronal Magnetic Restructuring
Sunquake Generation by Coronal Magnetic Restructuring Open
Sunquakes are the surface signatures of acoustic waves in the Sun's interior that are produced by some but not all flares and coronal mass ejections (CMEs). This paper explores a mechanism for sunquake generation by the magnetic field chan…
View article: Modeling Jets in the Corona and Solar Wind
Modeling Jets in the Corona and Solar Wind Open
Coronal jets are transient, collimated eruptions that occur in regions of predominantly open magnetic field in the solar corona. Our understanding of these events has greatly evolved in recent years but several open questions, such as the …