Journal
GEOPHYSICAL RESEARCH LETTERS
Volume 39, Issue -, Pages -Publisher
AMER GEOPHYSICAL UNION
DOI: 10.1029/2012GL051581
Keywords
-
Categories
Funding
- NESSF [NNX07AU72H, NNX07AI05G]
- Leonard Burlaga/Arctowski Medal Fellowship
- NASA [NNX10AT09G]
- NASA [123880, NNX10AT09G] Funding Source: Federal RePORTER
Ask authors/readers for more resources
We present observations of electromagnetic precursor waves, identified as whistler mode waves, at supercritical interplanetary shocks using the Wind search coil magnetometer. The precursors propagate obliquely with respect to the local magnetic field, shock normal vector, solar wind velocity, and they are not phase standing structures. All are right-hand polarized with respect to the magnetic field ( spacecraft frame), and all but one are right-hand polarized with respect to the shock normal vector in the normal incidence frame. They have rest frame frequencies f(ci) < f << f(ce) and wave numbers 0.02 less than or similar to k rho(ce) less than or similar to 5.0. Particle distributions show signatures of specularly reflected gyrating ions, which may be a source of free energy for the observed modes. In one event, we simultaneously observe perpendicular ion heating and parallel electron acceleration, consistent with wave heating/acceleration due to these waves. Although the precursors can have delta B/B-o as large as 2, fluxgate magnetometer measurements show relatively laminar shock transitions in three of the four events. Citation: Wilson, L. B., III, et al. (2012), Observations of electromagnetic whistler precursors at supercritical interplanetary shocks, Geophys. Res. Lett., 39, L08109, doi:10.1029/2012GL051581.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available