| 3 | 3 | Triggered star formation, in which winds generated from supernova blasts or wind-blown bubbles enters a clumpy region and compresses the clumps into dense cores that can violate local Jean's criterion and trigger gravitational collapse, is one of the mechanisms used to explain star forming regions such as Cygnus Loop, and more importantly, the Solar System. The triggering mechanism provides a natural way of forming stars while at the same time injecting SLRI's into the star and its disk. Recent years' literature has seen a noticeable increase in the amount of numerical works dedicated to this topic, as projects lead by Boss (Boss et al 2008) carried out pioneering work on the study of the shock condition of such successful triggering and mixing. In the general cases, the higher the Mach number of the shock, the more difficult it is to trigger collapse. From an intuitive point of view, the shock being too fast will shred the clump material away at a shorter time scale compared to the time scale for collapse. At the mean time, faster shock speed allows better mixing because of the enhanced Rayleigh-Taylor instability growth rate. |
