Distinguished Lecture Series

Cosmology on a Moving Mesh

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Date: Wednesday, April 24th

Time: 4:00 pm - 5:00 pm

Place: 1310 Sterling Hall

Speaker: Lars Hernquist, Harvard University

Abstract: Understanding the formation and evolution of galaxies in a cosmological context using numerical simulations remains an elusive goal. In this talk, I describe a new approach to modeling the hydrodynamics of galaxy formation in which the equations of motion are solved on a moving mesh. The use of a moving mesh makes the scheme fully Lagrangian, unlike popular particle-based codes which are quasi-Lagrangian in nature, and mitigates against advection errors when a spatially fixed grid is used. I present results from an initial study comparing results for a moving mesh with those obtained using a smoothed particle hydrodynamics solver. This preliminary work suggests that the new approach offers promise for resolving the long-standing problems which have plagued this field for nearly two decades.<br>

Host: Prof Elena D'Onghia

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