Search Publications

Cataloging Stream Interaction Regions at MAVEN: A Cross-comparative Study with STEREO-A

Allen, Robert C.; Lee, Christina O.; Halekas, Jasper S. +5 more

Stream interaction regions (SIRs) are long-lasting solar wind structures that result from stable fast solar wind interacting with preceding slow solar wind. These structures have been examined in depth throughout the heliosphere, particularly at 1 au; however, due to sparse observations, SIRs have not been characterized thoroughly at 1.5 au. Thank…

Ion Charge States from a Global Time-dependent Wave-turbulence-driven Model of the Solar Wind: Comparison with in Situ Measurements

Riley, Pete; Rivera, Yeimy J.; Lionello, Roberto

Solar wind charge-state measurements contain a wealth of knowledge related to the properties of the solar corona from where they originated. However, their interpretation has remained challenging because it convolves coronal temperature, density, and velocity along the particles' trajectory through the corona before they "freeze in" and are convec…

Fluctuations Driven by Multicomponent Pickup Ion Distributions in the Outer Heliosheath

Roytershteyn, Vadim; Mousavi, Ameneh; Fraternale, Federico +1 more

The stability of a realistic multicomponent pickup ion (PUI) velocity distribution derived from a global model of neutral atoms in the heliosphere, which treats hydrogen and helium atoms self-consistently and includes equations for electrons and helium ions, is investigated using linear instability analysis and hybrid simulations. Linear instabili…

Juno Observations of Langmuir Waves in Association with Interplanetary Shocks from ~1.3 to ~5.4 au

Cattell, C.; Elliott, S.; Hanson, E. L. M. +1 more

Langmuir waves are often observed upstream of planetary bow shocks and interplanetary (IP) shocks. Waveform capture (WFC) measurements, obtained during Juno's cruise phase, reveal the occurrence of Langmuir waves, as well as other wave modes, in association with IP shocks and IP coronal mass ejections (ICMEs) at distances from ∼1.3 to ∼5.4 au. Thi…

Constraining Solar Wind Transport Model Parameters Using Bayesian Analysis

Parashar, Tulasi N.; Oughton, Sean; Bishop, Mark A. +1 more

We apply nested-sampling Bayesian analysis to a model for the transport of magnetohydrodynamic-scale solar wind fluctuations. The dual objectives are to obtain improved constraints on parameters present in the turbulence transport model (TTM) and to support quantitative comparisons of the quality of distinct versions of the transport model. The TT…