Jasper S Halekas

Direct Measurement of Polar Coronal Hole-like Solar Wind in Its Acceleration Phase

Abstract The early evolution of fast polar coronal hole (PCH) solar wind remains largely unconstrained by in situ measurements. In 2025 March, Parker Solar Probe (Parker) at its closest approach of 9.86 solar radii ( R ⊙ ) measured outflow from a large equatorial coronal hole (EC...

Is Magnetic Reconnection Dominantly Spatially or Temporally Variable: First Results From TRACERS

Abstract The Tandem Reconnection And Cusp Electrodynamics Reconnaissance Satellites (TRACERS) small explorer mission was designed to: Determine whether magnetopause reconnection is primarily spatially or temporally variable for a range of solar wind conditions . Observations from...