Cynthia "Cindy" CattellProfessor, School of Physics and Astronomy
Ph.D., University of California, Berkeley, 1980
B.A., Hampshire College, 1974
- National Academy of Sciences/ Committee on Science Opportunities Enabled by NASA's Constellation System, 2008
- Member, Advisory Committee to UCLA Basic Plasma Science Facility, 2004-2007
- NASA SSSC Roadmap Committee, 2004-2005
- NASA Roadmap Committee, 2004-2005
- National Academy of Sciences/Plasma Sciences Committee, 2001-2005
- Chair, NASA Plasma Sail Assessment Working Group, 2003
- NASA Sun-Earth-Connection Advisory Subcommittee, 1998-2001
- National Academy of Sciences/Committee on Solar Terrestrial Research, 1993-1995
Scientific & Professional SocietiesFellow, American Geophysical UnionFellow, American Physical Society
Energization and loss of relativistic electrons in Van Allen belts
Building on our research utilizing data from the NASA STEREO satellites perigee passes that discovered very large amplitude waves capable of accelerating electrons to MeV energies in fraction of a second, we are using data from the Van Allen Probes satellites to examine dynamics of the Earth’s radiation belts. Our work shows that electron energization can be coherent and rapid rather than stochastic and slow (10s of hours). Comparison of wave data from our Van Allen Probes instruments to x-ray data obtained by the BARREL balloons showed, for the first time, coherence in the waves and electrons scattered by them on scales of many times the radius of the Earth. This is an unexpected result in part because the wave-electron interactions on are scales of kilometers. This experimental result could only be obtained due to careful planning so that the flotilla of balloons in Antarctica were on close to the same magnetic field line as the satellites. The Van Allen Probes data sets are providing the observations needed to determine many exciting, new physical processes in the radiation belts.
Waves associated with interplanetary shocks and solar wind electrons
Shock waves are important in many astrophysical settings; however, a detailed understanding of the structure of shocks in collisionless plasmas has nor yet been obtained. Utilizing particle and waves data from the WIND and STEREO satellites, we are examining shock structure at the Earth’s bow shock and at interplanetary shocks and the role of waves in dissipation at collisionless shocks. We are also studying a number of wave-particle interaction processes in the solar wind.
Particle acceleration in the aurora
Using in situ particle and fields data from the NASA FAST and Polar satellites and auroral images from IMAGE and TIMED, we are addressing a number of questions associated with the acceleration of electrons and ions in the Earth's auroral regions.
Microphysics of reconnection
Reconnection is a ubiquitous process in magnetized plasmas, converting magnetic field energy to particle energy. It is important in systems ranging from solar flares to fusion machines. Using data from the Polar, Cluster and THEMIS satellites, we are studying microphysics of reconnection, including the role of solitary waves, whistlers and lower hybrid waves. We are also examining the partitioning of energy outflow from reconnection regions.
Honors and Awards
- CSE Distinguished Professor, 2020
- Mullen-Spector-Truax Women's Leadership Award, 2014
- CSE Taylor Award for Service, 2011
- Cottrell Scholar, 1997
- Modeling Interactions of Narrowband Large Amplitude Whistler-mode Waves with Electrons in the Solar Wind inside ~0.3 au and at 1 au Using a Particle Tracing Code, Cynthia Cattell and Tien Vo 2021 ApJL 914 L33
- Narrowband oblique whistler-mode waves: Comparing properties observed by Parker Solar Probe at <0.3 AU and STEREO at 1 AU, C. Cattell, et al., Astronomy and Astrophysics, 650 A8 DOI: https://doi.org/10.1051/0004-6361/202039550, 2021a
- Periodicities in an active region correlated with Type III radio bursts observed by Parker Solar Probe, Cynthia Cattell, Lindsay Glesener, Benjamin Leiran, et al., Astronomy and Astrophysics, DOI: https://doi.org/10.1051/0004-6361/202039510, 2021b
- Parker Solar Probe evidence for scattering of electrons in the young solar wind by narrowband whistler-mode waves, C. Cattell et al ApJL 911 L29, 2021
- Narrowband large amplitude whistler-mode waves in the solar wind and their association with electrons: STEREO waveform capture observations, C. A. Cattell, B. Short, A.W. Breneman, and P.Grul, ApJ 897 126, https://doi.org/10.3847/1538-4357/ab961f, 2020.
- Dayside response of the magnetosphere to a small shock compression: Van Allen Probes, Magnetospheric MultiScale, and GOES-13, Cattell, C., et al. (2017), Geophys. Res. Lett., 44, 8712–8720, doi:10.1002/2017GL074895.
- Partitioning of integrated energy fluxes in four tail reconnection events observed by Cluster, Tyler, E., C. Cattell, S. Thaller, J. Wygant, C. Gurgiolo, M. Goldstein, and C. Mouikis (2016), J. Geophys. Res. Space Physics, 121, doi:10.1002/2016JA023330.
- Observations of a Global Coherence Scale Modulation of Radiation Belt Electron Loss Resulting From Plasmaspheric Hiss, A. W. Breneman, A. Halford, R. Millan, L. Woodger, G. Hospodarsky, J.R.Wygant, C.A. Kletzing, W.S. Kurth, S.R. Bounds, J.W. Bonnell, D. Malaspina, J.Sample, J. Fennell, K. Goetz, C. A. Cattell, K. Kersten, S. Thaller, L. Dai, A. Paradise, B. Anderson, N. Lavers, M. McCarthy, D. Milling, J. Sample, K. Yando, Nature, Volume: 523 Issue: 7559 Pages: 193-U321 Published: JUL 9 2015
- Solar cycle effects on parallel electric field acceleration of auroral electron beams,” C. Cattell, J. Dombeck and L. Hanson, Journal of Geophysical Research: Space Physics, Volume 118, Issue 9, September 2013, Pages: 5673–5680, Article first published online : 16 SEP 2013, DOI: 10.1002/jgra.50546
- THEMIS Observations of the Magnetopause Electron Diffusion Region: Large Amplitude Waves and Heated Electrons,’ Xiangwei Tang, Cynthia A. Cattell, John Dombeck, Lei Dai, Lynn Wilson, Aaron Breneman, Adam Hupach, GEOPHYSICAL RESEARCH LETTERS, 40 DOI: 10.1002/grl.50565, 2013