Journal
ASTROPHYSICAL JOURNAL LETTERS
Volume 765, Issue 1, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/2041-8205/765/1/L20
Keywords
acceleration of particles; ISM: supernova remnants; magnetic fields; shock waves
Categories
Funding
- NSF grant [AST-0807381]
- NASA [NNX09AT95G, NNX10A039G]
- PICSciE-OIT TIGRESS High Performance Computing Center and Visualization Laboratory
- Office of Science of the US Department of Energy [DE-AC02-05CH11231]
- Teragrid/XSEDE's Ranger [TG-AST100035]
- Direct For Mathematical & Physical Scien
- Division Of Physics [1144374] Funding Source: National Science Foundation
- Division Of Astronomical Sciences
- Direct For Mathematical & Physical Scien [0807381] Funding Source: National Science Foundation
- NASA [107773, NNX09AT95G] Funding Source: Federal RePORTER
Ask authors/readers for more resources
We used unprecedentedly large two-dimensional and three-dimensional hybrid (kinetic ions-fluid electrons) simulations of non-relativistic collisionless strong shocks in order to investigate the effects of self-consistently accelerated ions on the overall shock dynamics. The current driven by suprathermal particles streaming ahead of the shock excites modes transverse to the background magnetic field. The Lorentz force induced by these self-amplified fields tends to excavate tubular, underdense, magnetic-field-depleted cavities that are advected with the fluid and perturb the shock surface, triggering downstream turbulent motions. These motions further amplify the magnetic field, up to factors of 50-100 in knot-like structures. Once downstream, the cavities tend to be filled by hot plasma plumes that compress and stretch the magnetic fields in elongated filaments; this effect is particularly evident if the shock propagates parallel to the background field. Highly magnetized knots and filaments may provide explanations for the rapid X-ray variability observed in RX J1713.7-3946 and for the regular pattern of X-ray bright stripes detected in Tycho's supernova remnant.
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