C
Christina Cohen
Researcher at California Institute of Technology
Publications - 159
Citations - 5716
Christina Cohen is an academic researcher from California Institute of Technology. The author has contributed to research in topics: Solar energetic particles & Coronal mass ejection. The author has an hindex of 40, co-authored 145 publications receiving 4956 citations.
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Journal ArticleDOI
Shock Geometry, Seed Populations, and the Origin of Variable Elemental Composition at High Energies in Large Gradual Solar Particle Events
Allan J. Tylka,Christina Cohen,William F. Dietrich,Martin A. Lee,C. G. Maclennan,R. A. Mewaldt,Chee K. Ng,Chee K. Ng,Donald V. Reames +8 more
TL;DR: In this article, the authors proposed that the high-energy variability of gradual solar energetic particle (SEP) events arises from the interplay of two factors: shock geometry and a compound seed population, typically comprising both solar-wind and flare suprathermals.
Journal ArticleDOI
> 25 MeV Proton Events Observed by the High Energy Telescopes on the STEREO A and B Spacecraft and/or at Earth During the First ∼ Seven Years of the STEREO Mission
Ian G. Richardson,Ian G. Richardson,T. T. von Rosenvinge,Hilary V. Cane,E. R. Christian,Christina Cohen,A. W. Labrador,R. A. Leske,R. A. Mewaldt,Mark E. Wiedenbeck,E. C. Stone +10 more
TL;DR: In this paper, the authors summarize the properties of more than 200 individual > 25 MeV solar proton events, some detected by multiple spacecraft, and provide a catalog of these events and their solar sources and associations.
Journal ArticleDOI
Proton, helium, and electron spectra during the large solar particle events of October-November 2003
R. A. Mewaldt,Christina Cohen,A. W. Labrador,R. A. Leske,G. M. Mason,M. I. Desai,M. D. Looper,J. E. Mazur,R. S. Selesnick,Dennis Haggerty +9 more
TL;DR: The extraordinary period from late October through early November 2003 was marked by more than 40 coronal mass ejections (CME), eight X-class flares, and five large solar energetic particle (SEP) events as discussed by the authors.
Journal ArticleDOI
Energy Spectra, Composition, and Other Properties of Ground-Level Events During Solar Cycle 23
R. A. Mewaldt,M. D. Looper,Christina Cohen,Dennis Haggerty,A. W. Labrador,R. A. Leske,G. M. Mason,J. E. Mazur,T. T. von Rosenvinge +8 more
TL;DR: In this paper, spacecraft measurements of the energy spectra of solar protons and other solar energetic particle properties during the 16 Ground Level Events (GLEs) of Solar Cycle 23 were reported.
Journal ArticleDOI
The Longitudinal Properties of a Solar Energetic Particle Event Investigated Using Modern Solar Imaging
Alexis Rouillard,Alexis Rouillard,Alexis Rouillard,N. R. Sheeley,Allan J. Tylka,Angelos Vourlidas,Chee K. Ng,Chee K. Ng,Cara E. Rakowski,Christina Cohen,R. A. Mewaldt,G. M. Mason,Donald V. Reames,Neel Savani,O. C. StCyr,Adam Szabo +15 more
TL;DR: In this paper, the authors analyzed the relation between the eruption of the CME, the evolution of an Extreme Ultraviolet (EUV) wave, and the onset of a solar energetic particle (SEP) event measured in situ by the STEREO and near-Earth orbiting spacecraft.