Computational Fluid Dynamics of Stellar Mergers;Grazing vs. Direct Impact скачать в хорошем качестве

Computational Fluid Dynamics of Stellar Mergers;Grazing vs. Direct Impact

This video presents three distinct numerical simulations of stellar interactions between a high-mass B-type star (Blue) and a G-type main-sequence star (Yellow). These models visualize the conservation of angular momentum and the redistribution of stellar mass during high-energy encounters. Analysis of Simulations: Simulation 1: Tidal Capture & Grazing Merge An analysis of a low-impact parameter encounter. As the stars reach their Roche limit, tidal forces strip the outer envelopes, creating a transient mass-transfer bridge before final coalescence. Simulation 2: Head-on Stellar Collision A direct impact simulation (b = 0). This scenario demonstrates the rapid conversion of kinetic energy into thermal energy, resulting in significant shock heating and the potential creation of a Blue Straggler through complete stellar mixing. Simulation 3: Rapid Coalescence & Spin-up Observing the final stages of a merger where the two stellar cores unify. The resulting remnant often exhibits high rotational velocity and increased luminosity due to the newly combined hydrogen fuel source. Research Context: Understanding these collisions is vital for explaining stellar populations in dense environments like Globular Clusters and the Galactic Center. These simulations help define the boundary between stable binary systems and cataclysmic merger events. #Astrophysics #ComputationalPhysics #StellarEvolution #Astronomy #BinaryStars #SpaceScience #FluidDynamics