270 citations · 3.8k across the 80 of their papers we have counts for
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Measured energy exchange in coronal hole solar wind from its solar origins to the heliosphere
Yeimy J. Rivera, Alin R. Paraschiv, Samuel T. Badman +33
Coordinated ground- and space-based remote observations are used to provide a comprehensive, multi-perspective view of the solar atmosphere that we connect with in situ measurement…
Direct Measurement of Polar Coronal Hole-like Solar Wind in its Acceleration Phase
Samuel T. Badman, Yeimy J. Rivera, Michael L. Stevens +38
The early evolution of fast polar coronal hole (PCH) solar wind remains largely unconstrained by in situ measurements. In March 2025, Parker Solar Probe (Parker) at its closest app…
Free Energy Sources of Ion-scale Waves Observed by Parker Solar Probe
Niranjana Shankarappa, Kristopher G. Klein, Mihailo M. Martinović +6
Parker Solar Probe (PSP) observes abundant circularly polarized ion-scale waves throughout the inner heliosphere. These waves are a signature of the interplay between plasma microi…
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…
Multi-spacecraft Measurements of the Evolving Geometry of the Solar Alfvén Surface Over Half a Solar Cycle
Samuel T. Badman, Michael L. Stevens, Stuart D. Bale +18
The geometry of a star's Alfvén surface determines stellar angular momentum loss, separates a causally distinct 'corona' and stellar wind, and potentially affects exoplanetary habi…
Magnetic reconnection-driven energization of protons up to 400 keV at the near-Sun heliospheric current sheet
M. I. Desai, J. F. Drake, T. Phan +22
We report observations of direct evidence of energetic protons being accelerated above ~400 keV within the reconnection exhaust of a heliospheric current sheet (HCS) crossing by NA…
Parker Solar Probe Observations of Energetic Particles in the Flank of a Coronal Mass Ejection Close to the Sun
N. A. Schwadron, Stuart D. Bale, J. Bonnell +32
We present an event observed by Parker Solar Probe at 0.2 au on March 2, 2022 in which imaging and \emph{in situ} measurements coincide. During this event, PSP passed through…
Probing Turbulent Scattering Effects on Suprathermal Electrons in the Solar Wind: Modeling, Observations and Implications
Arnaud Zaslavsky, Justin C. Kasper, Eduard P. Kontar +7
This study explores the impact of a turbulent scattering mechanism, akin to those influencing solar and galactic cosmic rays propagating in the interplanetary medium, on the popula…
On the Mesoscale Structure of CMEs at Mercury's Orbit: BepiColombo and Parker Solar Probe Observations
Erika Palmerio, Fernando Carcaboso, Leng Ying Khoo +27
On 2022 February 15, an impressive filament eruption was observed off the solar eastern limb from three remote-sensing viewpoints, namely Earth, STEREO-A, and Solar Orbiter. In add…
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…
Are Switchback boundaries observed by Parker Solar Probe closed?
Nina Bizien, Thierry Dudok de Wit, Clara Froment +7
Switchbacks are sudden and large deflections in the magnetic field that Parker Solar Probe frequently observes in the inner heliosphere. Their ubiquitous occurrence has prompted nu…
Quantifying the Energy Budget in the Solar Wind from 13.3-100 Solar Radii
J. S. Halekas, S. D. Bale, M. Berthomier +10
A variety of energy sources, ranging from dynamic processes like magnetic reconnection and waves to quasi-steady terms like the plasma pressure, may contribute to the acceleration…
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…
The Radial Evolution of the Solar Wind as Organized by Electron Distribution Parameters
J. S. Halekas, P. Whittlesey, D. E. Larson +9
We utilize observations from the Parker Solar Probe (PSP) to study the radial evolution of the solar wind in the inner heliosphere. We analyze electron velocity distribution functi…
Radial evolution of thermal and suprathermal electron populations in the slow solar wind from 0.13 to 0.5 au : Parker Solar Probe Observations
Joel B. Abraham, Christopher J Owen, Daniel Verscharen +8
We develop and apply a bespoke fitting routine to a large volume of solar wind electron distribution data measured by Parker Solar Probe (PSP) over its first five orbits, covering…
Density And Velocity Fluctuations of Alpha Particles in Magnetic Switchbacks
M. D. McManus, J. L. Verniero, S. D. Bale +9
Magnetic switchbacks, or sudden reversals in the magnetic field's radial direction, are one of the more striking observations of Parker Solar Probe (PSP) thus far in its mission. W…
PSP/ISIS Observation of a Solar Energetic Particle Event Associated With a Streamer Blowout Coronal Mass Ejection During Encounter 6
T. Getachew, D. J. McComas, C. J. Joyce +21
In this paper we examine a low-energy SEP event observed by ISIS's Energetic Particle Instrument-Low (EPI-Lo) inside 0.18 AU on September 30, 2020. This small SEP event has…
Parker Solar Probe evidence for the absence of whistlers close to the Sun to scatter strahl and regulate heat flux
C. Cattell, A. Breneman, J. Dombeck +14
Using the Parker Solar Probe FIELDS bandpass filter data and SWEAP electron data from Encounters 1 through 9, we show statistical properties of narrowband whistlers from ~16 Rs to…
Suprathermal Ion Energy spectra and Anisotropies near the Heliospheric Current Sheet crossing observed by the Parker Solar Probe during Encounter 7
M. I. Desai, D. G. Mitchell, D. J. McComas +31
We present observations of >10-100 keV/nucleon suprathermal (ST) H, He, O, and Fe ions associated with crossings of the heliospheric current sheet (HCS) at radial distances <0.1 au…
Exploring the Solar Wind from its Source on the Corona into the Inner Heliosphere during the First Solar Orbiter - Parker Solar Probe Quadrature
Daniele Telloni, Vincenzo Andretta, Ester Antonucci +68
This Letter addresses the first Solar Orbiter (SO) -- Parker Solar Probe (PSP) quadrature, occurring on January 18, 2021, to investigate the evolution of solar wind from the extend…
Strong perpendicular velocity-space in proton beams observed by Parker Solar Probe
J. L. Verniero, B. D. G. Chandran, D. E. Larson +16
The SWEAP instrument suite on Parker Solar Probe (PSP) has detected numerous proton beams associated with coherent, circularly polarized, ion-scale waves observed by PSP's FIELDS i…
Characteristic scales of magnetic switchback patches near the Sun and their possible association with solar supergranulation and granulation
Naïs Fargette, Benoit Lavraud, Alexis Rouillard +16
Parker Solar Probe (PSP) data recorded within a heliocentric radial distance of 0.3 AU have revealed a magnetic field dominated by Alfvénic structures that undergo large local vari…
Ambipolar electric field and potential in the solar wind estimated from electron velocity distribution functions
Laura Bercic, Milan Maksimovic, Jasper S. Halekas +17
The solar wind escapes from the solar corona and is accelerated, over a short distance, to its terminal velocity. The energy balance associated with this acceleration remains poorl…
Direct evidence for magnetic reconnection at the boundaries of magnetic switchbacks with Parker Solar Probe
C. Froment, V. Krasnoselskikh, T. Dudok de Wit +20
Parker Solar Probe's first encounters with the Sun revealed the presence of ubiquitous localised magnetic deflections in the inner heliosphere; these structures, often called switc…