Abstract Details
| Name: Siddhartha Gupta Affiliation: Research scholar, Joint Astronomy Programme, IISc and RRI Conference ID: ASI2016_951 Title : Effect of radiation pressure on superbubbles in dense medium Authors and Co-Authors : Siddhartha Gupta(1,2), Biman B. Nath(1), Prateek Sharma(2), Yuri Shchekinov(3); (1) Raman Research Institute, Bangalore, India (2) Indian Institute of Science, Bangalore, India (3) P. N. Lebedev Physical Institute, Moscow, Russia Abstract Type : Poster Abstract Category : Stars, The Milky Way Galaxy and its neighbours Abstract : Feedback mechanisms are crucial in understanding the evolution of galaxies. A large contribution of such feedback comes from superbubbles that are driven by massive young star clusters. Using hydrodynamic simulations, we study the role of radiation pressure on the dynamics of superbubbles. We show that the concept of the cooling time scale of the shocked wind region estimated from the adiabatic model is not applicable in dense medium (density greater than ~100 mH/cc) and can bring different conclusions in understanding the role of driving mechanisms. We also show that the effect of radiation pressure may be dynamically important in pushing out the surrounding gas at the early stages of bubble evolution. We compare our results with the giant HII region 30 Doradus in Large Magellanic Cloud, and conclude that the radiation pressure might have a significant role at the early stage (< 2 Myr) of its evolution. |