6 papers · 1 filter
HST observations of NGC 6240
J. Gerssen, R. P. van der Marel, D. Axon +3
WFPC2 images and STIS spectroscopic observations are presented of the double nucleus in the merger system NGC 6240. We find that: (a) the kinematics of the ionized gas is similar t…
Dynamics of Stellar Collisions
Joshua E. Barnes
I compare gas-dynamical and stellar-dynamical models of collisions. These two models have distinctly different physics; for example, shocks introduce irreversibility in gas systems…
Gas Dynamics in Galaxy Mergers
Joshua E. Barnes
In interacting and merging galaxies, gas is subject to direct hydrodynamic effects as well as tidal forces. One consequence of interactions is the rapid inflows of gas which may fu…
Galaxy Transformation by Merging
Joshua E. Barnes
Theoretical considerations and observational data support the idea that mergers were more frequent in the past. At high redshifts, violent interactions and mergers may be implicate…
Galaxy Interactions
Joshua E. Barnes
Interacting galaxies are a natural arena for studies of non-equilibrium stellar dynamics, gas dynamics, and thermodynamics. Only galaxy formation itself is as deeply concerned with…
Dynamics of Mergers & Remnants
Joshua E. Barnes
This review focus on some issues which seem relevant to recent discussions: (1) how halo structure influences tail length, (2) the fate of power-law density cusps, (3) the results…