J
Jacob Bortnik
Researcher at University of California, Los Angeles
Publications - 305
Citations - 14504
Jacob Bortnik is an academic researcher from University of California, Los Angeles. The author has contributed to research in topics: Van Allen radiation belt & Van Allen Probes. The author has an hindex of 59, co-authored 267 publications receiving 11032 citations. Previous affiliations of Jacob Bortnik include New Jersey Institute of Technology & Stanford University.
Papers
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Journal ArticleDOI
Rapid local acceleration of relativistic radiation-belt electrons by magnetospheric chorus
Richard M. Thorne,Wen Li,Binbin Ni,Qianli Ma,Jacob Bortnik,Lunjin Chen,Daniel N. Baker,Harlan E. Spence,Geoffrey D. Reeves,Michael G. Henderson,Craig Kletzing,William S. Kurth,George Hospodarsky,J. B. Blake,Joseph F. Fennell,Seth G. Claudepierre,Shrikanth Kanekal +16 more
TL;DR: High-resolution electron observations obtained during the 9 October storm are reported and chorus scattering explains the temporal evolution of both the energy and angular distribution of the observed relativistic electron flux increase, and detailed modelling demonstrates the remarkable efficiency of wave acceleration in the Earth's outer radiation belt.
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Resonant scattering of plasma sheet electrons by whistler-mode chorus: Contribution to diffuse auroral precipitation
TL;DR: In this paper, a quantitative analysis is presented of the resonant scattering of plasma sheet electrons (∼100 eV-20 keV) at L = 6 due to resonant interactions with whistler-mode chorus.
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The unexpected origin of plasmaspheric hiss from discrete chorus emissions.
TL;DR: It is shown that a different wave type called chorus, previously thought to be unrelated to hiss, can propagate into the plasmasphere from tens of thousands of kilometres away, and evolve into hiss.
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Global distribution of whistler‐mode chorus waves observed on the THEMIS spacecraft
Wen Li,Richard M. Thorne,Vassilis Angelopoulos,Jacob Bortnik,Christopher Cully,Binbin Ni,O. LeContel,Alain Roux,Uli Auster,Werner Magnes +9 more
TL;DR: Li et al. as discussed by the authors performed a global survey of whistler-mode chorus waves using magnetic field filter bank data from the THEMIS spacecraft with 5 probes in near-equatorial orbits, which confirmed earlier analyses of the strong dependence of wave amplitudes on geomagnetic activity, confinement of nightside emissions to low magnetic latitudes, and extension of dayside emissions to high latitudes.
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Identifying the Driver of Pulsating Aurora
Yukitoshi Nishimura,Yukitoshi Nishimura,Jacob Bortnik,Wen Li,Richard M. Thorne,Larry R. Lyons,Vassilis Angelopoulos,Vassilis Angelopoulos,Vassilis Angelopoulos,Stephen B. Mende,John W. Bonnell,O. Le Contel,Christopher Cully,Robert E. Ergun,Uli Auster +14 more
TL;DR: Direct evidence is provided that a naturally occurring electromagnetic wave, lower-band chorus, can drive pulsating aurora, and the findings can be used to constrain magnetic field models with much higher accuracy than has previously been possible.