Events Archive
Title: Large-Amplitude, Short-Wavelength Fluctuations of Electric Field in the Transition Region of Collisionless Plasma Shocks
Dr. Vadim Roytershteyn, Space Science Institute, Boulder CO
Collisionless shocks are ubiquitous in space and astrophysical plasmas, where they often mediate conversion of flow energy into…
Title: Exploring interplanetary shocks with Solar Orbiter
Dr. Andrew Dimmock, The Swedish Institute of Space Physics (IRF)
Shocks are ubiquitous throughout the universe: around stars, supernova remnants, active galactic nuclei, binary systems, comets, and planets, and are known to be efficient particle accelerators…
Title: Velocity and Density Fluctuations in the Quiet Sun Corona
Dr. Michael Hahn, Columbia Astrophysics Laboratory, Columbia University
Some wave-driven models of coronal heating hypothesize that interactions between Alfvenic waves and density fluctuations enhance the rate of turbulent dissipation and thereby…
Title: Collisionless Heating in Clusters of Galaxies
Prof. Ellen Zweibel, Departments of Physics & Astronomy, University of Wisconsin-Madison
Clusters of galaxies are pervaded by plasma which is hot, tenuous, magnetized, and host to a population of relativistic cosmic rays. The cooling time of this gas…
Title: Investigating Energy Exchange and Wave-Particle Interactions in the Solar Wind
Dr. Michael Terres, Center for Astrophysics | Harvard & Smithsonian
Turbulence transfers energy from larger to smaller scales, wherein kinetic processes culminate in dissipation. In the context of the weakly collisional,…
Title: On shock formation in collisionless plasma
Mr. Hezekiah Grayer II, Department of Mathematics (Program in Applied & Computational Mathematics), Princeton University
Collisionless shocks in space plasma are frequently observed in settings where the plasma is compressed against a magnetosphere (e.g., Earth’s…
Title: Suppression of Reconnection Onset by Flow Shear
Dr. Alfred Mallet, Space Sciences Laboratory, UC Berkeley
Reconnection is regularly observed at current sheets in the solar wind at 1AU, and the scalings of these current sheets suggest that they are dynamically formed by the turbulence itself. Theoretical…
Title: Chaotic Signal in Turbulent Space Plasmas
Dr. Riddhi Bandyopadhyay, Department of Astrophysical Sciences, Princeton University
Most space and astrophysical plasmas are considered to be in turbulent state, often characterized by stochastic fluctuations. Many laboratory experiments and numerical simulations…
Title: Magnetic Reconnection in the Transition Region of Collisionless Shockwaves
Dr. Imogen Gingell, School of Physics & Astronomy, University of Southampton
Observations by Magnetospheric Multiscale have demonstrated that magnetic reconnection occurs at Earth's bow shock, typically at thin current sheets…
Title: Tayler Instability Revisited
Dr. Valentin Skoutnev, Department of Physics, Columbia University
Tayler instability of toroidal magnetic fields is broadly invoked as the main trigger for turbulence and angular momentum transport in stellar radiative zones. I will discuss a recent systematic revision of the…