RSAA Colloquia / Seminars / Feast-of-Facts: Friday, 01 February 2019, 14:30-15:00; CSO Common Room

Piyush Sharda

"Formation of the First Stars (Thesis Proposal Talk)"

Understanding the formation and evolution of the first stars (Population III) has been an outstanding issue in the physics of the Early Universe. First stars are believed to have formed at redshifts > 15 and were responsible for the metal enrichment and re-ionization of the primordial Universe. Thanks to computational resources, some progress has been made in the last two decades in simulating the formation and subsequent evolution of these stars. However, most of these simulations remain restricted by physical, numerical or resolution-based limitations. In this thesis proposal talk, I will describe my plans to carry out high-resolution magnetohydrodynamical (MHD) simulations of primordial clouds where first stars form. In particular, the three key areas where I plan to contribute in the field are: 1.) inclusion and realistic treatment of turbulence and magnetic fields in the simulations, 2.) connecting with cosmological simulations by extracting dark matter mini-halos as precursors of primordial clouds and 3.) radiative transfer from massive protostars and mechanical feedback by protostellar jets and outflows. This research can help advance our knowledge of the initial mass function (IMF) of the first stars which is crucial to understand the nature of the high-redshift Universe.