Blar i Bergen Open Research Archive på forfatter "Gershman, D.J."

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    • Bifurcated Current Sheet Observed on the Boundary of Kelvin-Helmholtz Vortices 

      Hwang, K.-J.; Dokgo, K.; Choi, E.; Burch, J.L.; Sibeck, D.G.; Giles, B.L.; Norgren, Astrid Elisabet Cecilia; Nakamura, T.K.M.; Graham, D.B.; Khotyaintsev, Y.; Shi, Q.Q.; Gershman, D.J.; Pollock, C.J.; Ergun, R.E.; Torbert, R.B.; Russell, C.T.; Strangeway, R.J. (Journal article; Peer reviewed, 2021)
      On May 5, 2017 MMS observed a bifurcated current sheet at the boundary of Kelvin-Helmholtz vortices (KHVs) developed on the dawnside tailward magnetopause. We use the event to enhance our understanding of the formation and ...

    • Direct observations of anomalous resistivity and diffusion in collisionless plasma 

      Graham, D.B.; Khotyaintsev, Yu. V.; André, M.; Vaivads, A.; Divin, A.; Drake, J.F.; Norgren, Astrid Elisabet Cecilia; Le Contel, Contel; Lindqvist, P.-A.; Rager, A.C.; Gershman, D.J.; Russell, C.T.; Burch, J.L.; Hwang, K.-J.; Dokgo, K. (Journal article; Peer reviewed, 2022)
      Coulomb collisions provide plasma resistivity and diffusion but in many low-density astrophysical plasmas such collisions between particles are extremely rare. Scattering of particles by electromagnetic waves can lower the ...

    • Electron Bernstein waves driven by electron crescents near the electron diffusion region 

      Li, Wenya; Graham, D. B.; Khotyaintsev, Yuri V.; Vaivads, Andris; André, Mats; Min, K.; Liu, K.; Tang, B.B.; Wang, C.; Fujimoto, K.; Norgren, Astrid Elisabet Cecilia; Toledo-Redondo, Sergio; Lindqvist, Per-Arne; Ergun, R.E.; Torbert, Roy B.; Rager, A.C.; Dorelli, J.C.; Gershman, D.J.; Giles, B. L.; Lavraud, B.; Plaschke, F.; Magnes, W.; Le Contel, Olivier; Russell, Christopher T.; Burch, J. L. (Journal article; Peer reviewed, 2020)
      The Magnetospheric Multiscale (MMS) spacecraft encounter an electron diffusion region (EDR) of asymmetric magnetic reconnection at Earth’s magnetopause. The EDR is characterized by agyrotropic electron velocity distributions ...

    • Spatial evolution of magnetic reconnection diffusion region structures with distance from the X-line 

      Oieroset, M; Phan, Tai D.; Ergun, R.E.; Ahmadi, N.; Genestreti, K.; Drake, J. F.; Liu, Y.; Haggerty, CM; Eastwood, JP; Shay, M.A.; Pyakural, P.; Haaland, Stein Egil; Oka, M; Goodbred, M; Eriksson, S; Burch, J. L.; Torbert, R; Khotyaintsev, Y; Russell, C. T.; Strangeway, R; Gershman, D.J.; Giles, B. L. (Journal article; Peer reviewed, 2021)
      We report Magnetospheric Multiscale four-spacecraft observations of a thin reconnecting current sheet with weakly asymmetric inflow conditions and a guide field of approximately twice the reconnecting magnetic field. The ...