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Browsing Physics by Author "J. D. Perez, perez@auburn.edu"

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Comparison of TWINS and THEMIS observations of proton pitch angle distributions in the ring current during the 29 May 2010 geomagnetic storm 

Grimes, E. W.; Perez, J. D.; Goldstein, J.; McComas, D. J.; Valek, P.; Turner, D. (2020-06-09)
The first comparison between energy-dependent ion pitch angle distributions in the ring current deconvolved from Two Wide-angle Imagining Neutral-atom Spectrometers (TWINS) energetic neutral atom (ENA) images and measured ...

The Comprehensive Inner Magnetosphere-Ionosphere Model 

Fok, M. -C.; Buzulukova, N. Y.; Chen, S. -H.; Glocer, A.; Nagai, T.; Valek, P.; Perez, J. D. (2020-06-05)
Simulation studies of the Earth's radiation belts and ring current are very useful in understanding the acceleration, transport, and loss of energetic particles. Recently, the Comprehensive Ring Current Model (CRCM) and ...

Evolution of CIR storm on 22 July 2009 

Perez, J. D.; Grimes, E. W.; Goldstein, J.; McComas, D. J.; Valek, P.; Billor, N. (2020-06-09)
Global images of ion intensities are deconvolved from TWINS ENA images during the main and recovery phase of a CIR storm on 22 July 2009. The global spatial ion images taken at different times, along with solar wind data, ...

Oxygen-hydrogen differentiated observations from TWINS: The 22 July 2009 storm 

Valek, P. W.; Goldstein, J.; McComas, D. J.; Ilie, R.; Buzulukova, N.; Fok, M. -C.; Perez, J. D. (2020-06-09)
The 22 July 2009 magnetic storm is the first significant storm during the emergence of the recent prolonged solar cycle minimum. This moderate storm (minimum Dst approximately -78 nT) has received a good deal of attention ...

Statistical correlation of low-altitude ENA emissions with geomagnetic activity from IMAGE/MENA observations 

Mackler, D. A.; Jahn, J-M; Perez, J. D.; Pollock, C. J.; Valek, P. W. (2020-06-03)
Plasma sheet particles transported Earthward during times of active magnetospheric convection can interact with exospheric/thermospheric neutrals through charge exchange. The resulting Energetic Neutral Atoms (ENAs) are ...