Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007a%26a...463..195w&link_type=abstract
Astronomy and Astrophysics, Volume 463, Issue 1, February III 2007, pp.195-201
Astronomy and Astrophysics
Astrophysics
4
Shock Waves, Ism: Cosmic Rays, Hydrodynamics, Instabilities, Ism: Supernova Remnants
Scientific paper
Aims:We extend the study of two-fluid models of cosmic-ray modified radiative shocks by including energy transfer from the cosmic rays to the thermal gas due to a cosmic-ray driven acoustic instability. Methods: We perform hydrodynamic simulations to find solutions to the time-dependent, one-dimensional two-fluid equations governing the thermal fluid and cosmic-ray fluid. Source terms transferring energy between the two fluids are included. Results: The magnitudes of the source terms determine the degree to which the cosmic rays modify the radiative shock. We found a range of steady solutions characterised by moderate cosmic-ray acceleration and a compression ratio significantly greater than 7, which is the limit for cosmic-ray dominated shocks. The post-shock temperature and overall compression increase as the source term in the thermal fluid's energy equation increases. For sufficiently strong coupling, the solutions are thermally overstable.
Falle Sam A. E. G.
Hartquist Thomas W.
Wagner Alexander Y.
No associations
LandOfFree
Two-fluid models of cosmic-ray modified radiative shocks including the effects of an acoustic instability 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 Two-fluid models of cosmic-ray modified radiative shocks including the effects of an acoustic instability, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Two-fluid models of cosmic-ray modified radiative shocks including the effects of an acoustic instability will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-734028