Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aps..aprj11005h&link_type=abstract
American Physical Society, April Meeting, Jointly Sponsored with the High Energy Astrophysics Division (HEAD) of the American As
Astronomy and Astrophysics
Astrophysics
Scientific paper
Collisions between similarly massive, gas-rich disk galaxies induce strong features throughout galactic disks. Large-scale shock waves are produced by ram pressure between the interpenetrating gas disks, and by large material motions due to the gravitational contraction of the disks. Shock waves are an important source of thermal energy for the interstellar medium, and these may be responsible for significant amounts of the hot gas observed in the halos of some strongly interacting galaxies. We have used n-body gravity and Smoothed Particle Hydrodynamics simulations to model collisions between gas-rich disk galaxies. These simulations allow us to trace the shock waves that occur within the disk galaxies; monitoring the evolution of the gas reveals the amount of shock-heated material that is transported into the halo. We acknowledge support from DOE contract LLNL B506657.
Anninos Peter
Bazan Grant
Hearn Nathan C.
Lamb Susan A.
Murray Stephen D.
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