Poster for paper titled "Massive core/star formation triggered by cloud-cloud collision: Effect of magnetic field"

This is poster on our paper titled “Massive core/star formation triggered by cloud-cloud collision: effect of magnetic field”. Massive stars are important in astrophysics, however their formation process is not well understood. Cloud-cloud collision is a strong candidate for massive star formation. We study the effect of magnetic field on massive dense core formation in colliding unequal molecular clouds by performing magnetohydrodynamic simulations with sub-parsec resolution (0.015 pc) that can resolve the molecular cores. We show that a greater number of massive, gravitationally bound cores are formed in the strong magnetic field (4.0 µG) models than the weak magnetic field (0.1 µG) models. This is partly because the strong magnetic field suppresses the spatial shifts of the shocked layer that should be caused by the nonlinear thin shell instability. The spatial shifts promote the formation of low-mass dense cores in the weak magnetic field models. The strong magnetic fields also support low-mass dense cores against gravitational collapse. In the strong magnetic field (perpendicular and oblique to collision axis models), we found that massive bound cores are formed in filaments, which are roughly normal to magnetic field.