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In the standard Lamda CDM model galaxies are formed in collapsed dark matter halos. These dark matter halos are produced from the initial density and velocity perturbations that evolve through gravitational attraction. New JWST observations put stringent constraints on number of galaxies per unit volume, mass of stars in galaxies and number density of super-massive blackholes etc. In this talk the speaker will present the widely accepted scenario of galaxy formation, its present status and how these models perform against the JWST observations. The speaker will introduce their new hydrodynamical simulation "The NISER-IUCAA New Simulations of JWST GAlaxies and Quasars" (NINJA) and present preliminary results.
Prof. Raghunathan Srianand is the director of the Inter-University Centre for Astronomy and Astrophysics in Pune. He is the recipient of the Shanti Swarup Bhatnagar Prize (2008) and has made outstanding contributions to high-redshift proto-galaxies, time and space variation of fundamental constants and redshift evolution of the CMB radiation amongst others