Tidal Stability of Giant Molecular Clouds in the Large Magellanic Cloud

摘要: Star formation does not occur until the onset of gravitational collapse inside giant molecular clouds. However, conditions that initiate cloud and regulate star process remain poorly understood. Local processes such as turbulence magnetic fields can act to promote or prevent collapse. On larger scales, galactic potential also influence stability is traditionally assessed by tidal shear effects. In this paper, we examine clouds (GMCs) in Large Magellanic Cloud (LMC) against tide using CO data from Mopra Assessment (MAGMA) rotation curve literature. We calculate acceleration experienced individual GMCs determine minimum mass required for stability. parameter, which a measure cloud's susceptibility disruption via shearing forces disk. whether there are correlations between properties forming activity their disruption. find approximate balance LMC, unlikely affect further evolution. with masses close minimal stable unusual terms mass, location, brightness, but note large velocity dispersion tend be more sensitive instability. smaller radii, represent majority our sample, strongly resist Our results demonstrate LMC inhibited