Gravitational Fragmentation in Galaxy Mergers: A Stability Criteria
  We study the gravitational stability of gaseous streams in the complex
environment of a galaxy merger, because mergers are known to be places of
ongoing massive cluster formation and bursts of star formation. We find an
analytic stability parameter for case of gaseous streams orbiting around the
merger remnant. We test our stability criteria using hydrodynamical simulations
of galaxy mergers, obtaining satisfactory results. We find that our criteria
successfully predicts the streams that will be gravitationally unstable to
fragment into clumps.
