Dynamical evolution of the termination Shock: consequences for charged particle acceleration

Details Dynamical evolution of the termination Shock: consequences for charged particle acceleration Dynamical evolution of the termination Shock: consequences for charged particle acceleration

Sep 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aipc..858..159f&link_type=abstract

PHYSICS OF THE INNER HELIOSHEATH: Voyager Observations, Theory, and Future Prospects; 5th Annual IGPP International Astrophysics

Astronomy and Astrophysics

Astrophysics

4

Heliopause And Solar Wind Termination, Particle Acceleration, Planetary Bow Shocks, Interplanetary Shocks, Energetic Particles

Scientific paper

During the 2002-2004 precursor events and in the heliosheath, Voyager 1 observed several distinct energetic particle populations with different power law spectra, as well as a high-energy modulated component. We investigate the possibility that some of these populations could be produced by diffusive shock acceleration at a termination shock (TS) that is subjected to collisions with large scale structures, such as merged interaction regions (MIR). Using a simple 1D model where an MIR is initiated as a velocity enhancement followed by a rarefaction, we show that the TS compression ratio first decreases at the onset of the interaction followed by an increase during the passage of a rarefaction. We demonstrate that particles accelerated at such a dynamic shock would possess a multiple component spectrum that bears a qualitative resemblance to Voyager 1 observations. Our results also predict inward TS motion during the later stages of the interaction, consistent with the period of anomalously low radial velocity in the heliosheath in early 2005.

Affiliated with

Also associated with

No associations

Rating

Dynamical evolution of the termination Shock: consequences for charged particle acceleration does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Dynamical evolution of the termination Shock: consequences for charged particle acceleration, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dynamical evolution of the termination Shock: consequences for charged particle acceleration will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-994283