270 citations · 2.3k across the 58 of their papers we have counts for
58 papers
Cyclotron breaking: a mechanism for parallel ion cyclotron waves to heat the fast solar wind
Evan L. Yerger, Benjamin D. G. Chandran, Vincent David +2
The () mission has observed near-continuous power in parallel ion cyclotron waves (PICWs) in the young, fast solar wind. These waves are…
Properties of Magnetic Switchbacks in the Near-Sun Solar Wind
Samuel T. Badman, Naïs Fargette, Lorenzo Matteini +24
Magnetic switchbacks are fluctuations in the solar wind in which the interplanetary magnetic field sharply deflects away from its background direction so as to create folds in magn…
Velocity-space turbulent cascade in the near-Sun solar wind: first insights from the Parker Solar Probe mission
A. Larosa, O. Pezzi, T. Bowen +11
In space plasmas, the rarity of collisions leads to complex structures in the velocity space where a turbulent cascade of the velocity distribution function fluctuations is thought…
Proton specific entropy as a proxy for the charge state ratio over heliocentric distance
Jack D. Collard, Tamar Ervin, Ryan M. Dewey +10
While the fast solar wind has well-established origins in coronal holes, the source of the slow solar wind remains uncertain. Compositional metrics, such as heavy ion charge state…
On the Propagation and Damping of Alfvenic Fluctuations in the Outer Solar Corona and Solar Wind
Nikos Sioulas, Marco Velli, Chen Shi +17
We analyze \textit{Parker Solar Probe} and \textit{Solar Orbiter} observations to investigate the propagation and dissipation of Alfvénic fluctuations from the outer corona to 1~AU…
Formation of Magnetic Switchbacks via expanding Alfvén Waves
Trevor A. Bowen, Alfred Mallet, Corina I. Dunn +8
Context. Large-amplitude inversions of the solar wind's interplanetary magnetic field have long been documented; however, observations from the Parker Solar Probe (PSP) mission hav…
Intermittent, Reflection-Driven, Strong Imbalanced MHD Turbulence
B. D. G. Chandran, N. Sioulas, S. Bale +4
We develop a phenomenological model of strong imbalanced magnetohydrodynamic (MHD) turbulence that accounts for intermittency and the reflection of Alfven waves by spatial variatio…
Observations of Transition from Imbalanced to Balanced Kinetic Alfvénic Turbulence
Jinsong Zhao, Trevor A. Bowen, Stuart D. Bale +3
We report observations of solar wind turbulence derived from measurements by the Parker Solar Probe. Our findings reveal the emergence of finite magnetic helicity within the transi…
Scale-Dependent Dynamic Alignment in MHD Turbulence: Insights into Intermittency, Compressibility, and Imbalance Effects
Nikos Sioulas, Marco Velli, Alfred Mallet +7
Scale-Dependent Dynamic Alignment (SDDA) in Elsässer field fluctuations is theorized to suppress nonlinearities and modulate the energy spectrum. Limited empirical evidence exists…
Extended Cyclotron Resonant Heating of the Turbulent Solar Wind
Trevor A. Bowen, Ivan Y. Vasko, Stuart D. Bale +8
Circularly polarized, nearly parallel propagating waves are prevalent in the solar wind at ion-kinetic scales. At these scales, the spectrum of turbulent fluctuations in the solar…
Near subsonic solar wind outflow from an active region
Tamar Ervin, Stuart D. Bale, Samuel T. Badman +10
During Parker Solar Probe (Parker) Encounter 15 (E15), we observe an 18-hour period of near subsonic ( 1) and sub-Alfvénic (SA), <<< 1, slow speed…
Dominance of 2-Minute Oscillations near the Alfvén Surface
Zesen Huang, Marco Velli, Chen Shi +11
Alfvén waves, considered one of the primary candidates for heating and accelerating the fast solar wind, are ubiquitous in spacecraft observations, yet their origin remains elusive…
Resonance of low-frequency electromagnetic and ion-sound modes in the solar wind
I. Y. Vasko, F. S. Mozer, T. Bowen +6
Parker Solar Probe measurements have recently shown that coherent fast magnetosonic and Alfvén ion-cyclotron waves are abundant in the solar wind and can be accompanied by higher-f…
Higher-Order Analysis of Three-Dimensional Anisotropy in Imbalanced Alfvénic Turbulence
Nikos Sioulas, Themistocles Zikopoulos, Chen Shi +10
We analyze in-situ observations of imbalanced solar wind turbulence to evaluate MHD turbulence models grounded in "Critical Balance" (CB) and "Scale-Dependent Dynamic Alignment" (S…
Solar Wind Structures from the Gaussianity of Magnetic Magnitude
Zesen Huang, Chen Shi, Marco Velli +9
One of the primary science objectives of Parker Solar Probe (PSP) is to determine the structures and dynamics of the plasma and magnetic fields at the sources of the solar wind. Ho…
Proton and Alpha Driven Instabilities in an Ion Cyclotron Wave Event
Michael D. McManus, Kristopher G. Klein, Davin Larson +8
Ion scale wave events or "wave storms" in the solar wind are characterised by enhancements in magnetic field fluctuations as well as coherent magnetic field polarisation signatures…
Compositional metrics of fast and slow Alfvenic solar wind emerging from coronal holes and their boundaries
Tamar Ervin, Stuart D. Bale, Samuel T. Badman +7
We seek to understand the composition and variability of fast (FSW) and slow Alfvenic solar wind (SASW) emerging from coronal holes (CH). We leverage an opportune conjunction betwe…
Mediation of Collisionless Turbulent Dissipation Through Cyclotron Resonance
Trevor A. Bowen, Stuart D. Bale, Benjamin D. G. Chandran +6
The dissipation of magnetized turbulence is fundamental to understanding energy transfer and heating in astrophysical systems. Collisionless interactions, such as resonant wave-par…
The Temperature, Electron, and Pressure Characteristics of Switchbacks: Parker Solar Probe Observations
Jia Huang, Justin C. Kasper, Davin E. Larson +19
Parker Solar Probe (PSP) observes unexpectedly prevalent switchbacks, which are rapid magnetic field reversals that last from seconds to hours, in the inner heliosphere, posing new…
Effect of Spherical Polarization on the Magnetic Spectrum of the Solar Wind
Corina Dunn, Trevor Bowen, Alfred Mallet +2
Magnetic fluctuations in the solar wind are often observed to maintain constant magnitude of the magnetic field in a manner consistent with spherically-polarized large-amplitude Al…
Nonlinear dynamics of small-scale Alfvén waves
Alfred Mallet, Seth Dorfman, Mel Abler +2
We study the nonlinear evolution of very oblique small-scale Alfvén waves with . At these scales, the waves become significantly compressive, unlike in MHD, d…
The Evolution of the 1/f Range Within a Single Fast-Solar-Wind Stream Between 17.4 and 45.7 Solar Radii
Nooshin Davis, B. D. G. Chandran, T. A. Bowen +7
The power spectrum of magnetic-field fluctuations in the fast solar wind ($V_{\rm SW}> 500 \mbox{ km} \mbox{ s}^{-1}$) at magnetohydrodynamic (MHD) scales is characterized by two d…
New Observations of Solar Wind 1/f Turbulence Spectrum from Parker Solar Probe
Zesen Huang, Nikos Sioulas, Chen Shi +22
The trace magnetic power spectrum in the solar wind is known to be characterized by a double power law at scales much larger than the proton gyro-radius, with flatter spectral expo…
Parker Solar Probe: Four Years of Discoveries at Solar Cycle Minimum
N. E. Raouafi, L. Matteini, J. Squire +54
Launched on 12 Aug. 2018, NASA's Parker Solar Probe had completed 13 of its scheduled 24 orbits around the Sun by Nov. 2022. The mission's primary science goal is to determine the…