77 citations · 91 across the 13 of their papers we have counts for
9 papers · 1 filter
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…
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…
Differentiating the acceleration mechanisms in the slow and Alfvénic slow solar wind
Yeimy J. Rivera, Samuel T. Badman, J. L. Verniero +18
In the corona, plasma is accelerated to hundreds of kilometers per second, and heated to temperatures hundreds of times hotter than the Sun's surface, before it escapes to form the…
An Overview of Solar Orbiter Observations of Interplanetary Shocks in Solar Cycle 25
D. Trotta, A. Dimmock, H. Hietala +17
Interplanetary shocks are fundamental constituents of the heliosphere, where they form as a result of solar activity. We use previously unavailable measurements of interplanetary s…
Mixed Source Region Signatures Inside Magnetic Switchback Patches Inferred by Heavy Ion Diagnostics
Yeimy J. Rivera, Samuel T. Badman, Michael L. Stevens +13
Since Parker Solar Probe's (Parker's) first perihelion pass at the Sun, large amplitude Alfvén waves grouped in patches have been observed near the Sun throughout the mission. Seve…
In situ observations of large amplitude Alfvén waves heating and accelerating the solar wind
Yeimy J. Rivera, Samuel T. Badman, Michael L. Stevens +16
After leaving the Sun's corona, the solar wind continues to accelerate and cools, but more slowly than expected for a freely expanding adiabatic gas. We use in situ measurements fr…
Observation of a Fully-formed Forward--Reverse Shock Pair Due to the Interaction Between Two Coronal Mass Ejections at 0.5 au
D. Trotta, A. Dimmock, X. Blanco-Cano +17
We report direct observations of a fast magnetosonic forward--reverse shock pair observed by Solar Orbiter on March 8, 2022 at the short heliocentric distance of 0.5 au. The struct…
Comparative study of the kinetic properties of proton and alpha beams in the Alfvénic wind observed by SWA-PAS onboard Solar Orbiter
Roberto Bruno, Rossana DeMarco, Raffaella D Amicis +12
The problems of heating and acceleration of solar wind particles are of significant and enduring interest in astrophysics. The interactions between waves and particles are crucial…
Coronal jets, magnetic topologies, and the production of interplanetary electron streams
C. Li, S. A. Matthews, L. van Driel-Gesztelyi +2
We investigate the acceleration source of the impulsive solar energetic particle (SEP) events on 2007 January 24. Combining the in situ electron measurements and remote-sensing sol…