Forming Massive Star Clusters
During Galaxy-Galaxy Interactions
Interacting Systems with Young Star Clusters
Selected Star Fields
Giant Molecular Clouds (GMCs) as Cluster Progenitors
How do Stars Ordinarily Form in GMCs?
Rates set by Ambipolar Diffusion
Not as Bound Clusters (because
< < 50%)
How Can the Bombs
be Ignited During A Galaxy-Galaxy Interaction?
Cloud-cloud Collisions? (an old-time favorite)
Environmental Over-Pressure (
Jog and Solomon 1992
Move the GMC into an Environment where the
Cosmic-Ray Flux is Low
GMCs make superb bombs.
The bombs can be ignited by the environment without resorting to violent, gas-dynamical triggers.
What about young clusters in the LMC?
Any Evidence that this Works? [