Andrew J. McCubbin

Simulations of Coronal Mass Ejection Injection into the Inner Heliosphere with Displacement of the Heliospheric Magnetic Field

Elena Provornikova, Mark G. Linton, Kalman Knizhnik, Brian E. Wood et autres

Abstract Magnetohydrodynamic (MHD) simulations are a useful tool for understanding the propagation of coronal mass ejections (CMEs) in the inner heliosphere and their interaction with the background solar wind. This understanding is important for improving our ability to predict CME properties at …

Why Do Solar Wind Models Get It Wrong? Understanding the Capabilities of Time-dependent Solar Wind Simulations

Evangelia Samara, Elena Provornikova, C. N. Arge, Andrew J. McCubbin et autres

Abstract We explore the capabilities of time-dependent (TD) magnetohydrodynamic (MHD) solar wind simulations with the coupled Wang–Sheeley–Arge (WSA) model of the solar corona and the Grid Agnostic MHD for Extended Research Applications model of the inner heliosphere. We compare TD with steady-state …

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Validation of a Global Geospace Model With a Systems Science Approach Based on Canonical Correlation Analysis

Gian Luca Delzanno, Brianna Isola, Christian J. Lao, Joseph E. Borovsky et autres

Abstract A systems science approach based on canonical correlation analysis (CCA) is applied as a new, behavioral way to validate global geospace models. The biggest novelty of the technique is that it validates models at a system level, whereby a side‐by‐side comparison …

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Why do solar wind models get it wrong: understanding the capabilities of time-dependent solar wind simulations

Evangelia Samara, Elena Provornikova, C. N. Arge, Andrew J. McCubbin et autres

We explore the capabilities of time-dependent (TD) magnetohydrodynamics (MHD) solar wind simulations with the coupled WSA model of the solar corona and GAMERA model of the inner heliosphere. We compare TD with steady state (SS) simulations and with in situ data from …

High-Resolution Simulations of CME-Solar Wind Interaction in The Heliosphere: A Focus On Mesoscale Structures For PUNCH

Elena Provornikova, V. G. Merkin, Evangelia Samara, Carlos Galvão Braga et autres

Understanding mesoscale structures in the solar wind background and coronal mass ejections (CMEs) is one of the science objectives of the PUNCH mission to be launched in early 2025. We do not fully understand what processes form these structures and where as …

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Validation of a global geospace model with a systems science approach based on canonical correlation analysis

Gian Luca Delzanno, Brianna Isola, Christian J. Lao, Joseph E. Borovsky et autres

A systems science approach based on canonical correlation analysis (CCA) is applied as a new, behavioral way to validate global geospace models. The biggest novelty of the technique is that it validates models at a system level, whereby a side-by-side comparison is …

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The velocity-space signature of transit-time damping

Rui Huang, G. G. Howes, Andrew J. McCubbin

Transit-time damping (TTD) is a process in which the magnetic mirror force – induced by the parallel gradient of magnetic field strength – interacts with resonant plasma particles in a time-varying magnetic field, leading to the collisionless damping of electromagnetic waves and …

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The Velocity-Space Signature of Transit-Time Damping

Rui Huang, G. G. Howes, Andrew J. McCubbin

Transit-time damping (TTD) is a process in which the magnetic mirror force -- induced by the parallel gradient of magnetic field strength -- interacts with resonant plasma particles in a time-varying magnetic field, leading to the collisionless damping of electromagnetic waves and …

Ion Dynamics and Velocities in Titan's Upper Atmosphere

J. H. Westlake, Andrew J. McCubbin, V. Toy

The Cassini mission yielded a treasure trove of information on Saturn's largest moon Titan. With many flybys of this complex moon Cassini revealed many aspects of Titan's upper atmosphere and interaction with Saturn's magnetosphere. In many ways Cassini revealed that this moon …

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Characterizing the Velocity-Space Signature of Electron Landau Damping

Sarah A. Conley, G. G. Howes, Andrew J. McCubbin

Plasma turbulence plays a critical role in the transport of energy from large-scale magnetic fields and plasma flows to small scales, where the dissipated turbulent energy ultimately leads to heating of the plasma species. A major goal of the broader heliophysics community …

Characterizing the velocity-space signature of electron Landau damping

Sarah A. Conley, G. G. Howes, Andrew J. McCubbin

Plasma turbulence plays a critical role in the transport of energy from large-scale magnetic fields and plasma flows to small scales, where the dissipated turbulent energy ultimately leads to heating of the plasma species. A major goal of the broader heliophysics community …

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Observing particle energization above the Nyquist frequency: An application of the field-particle correlation technique

G. G. Howes, Andrew J. McCubbin

The field-particle correlation technique utilizes single-point measurements to uncover signatures of various particle energization mechanisms in turbulent space plasmas. The signature of Landau damping by electrons has been found in both simulations and in situ data from Earth's magnetosheath using this technique, …

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