When a protoplanetary disk collides with a gas stream, the impact alters stellar accretion. A study using three-dimensional gas dynamics simulations shows that the orbital inclination and mass of the incoming material determine the accretion rate. The results match observations of FU Ori-type stars, explaining their activity peaks.
3D Simulations Model the Impact of Gas on Accretion 🌌
Three-dimensional simulations allow tracking how gas flows and accumulates onto the young star. The study identifies that streams with greater mass and a certain inclination generate more intense accretion peaks. These models reproduce the temporal evolution observed in FU Ori stars, although they depend on ideal conditions that require further validation with real data to confirm their accuracy.
Gas Also Has Its Days of Glory (and Collision) 💥
It turns out that gas doesn't just gently fall onto stars. Sometimes it takes its time, forms disks, and then collides with other flows as if it were a cosmic traffic accident. Orbital inclination is key: if it enters very straight, the star feeds well; if it comes in tilted, the feast gets complicated. Good thing there are no traffic lights in space.