Northwestern University

Jan
22
Tue 4:00 PM

Astro Seminar: Andrew Hearin: Modeling Cosmological Structure Formation with Extreme-Scale Simulations

Andrew Hearin

When: Tuesday, January 22, 2019
4:00 PM - 5:00 PM  

Where: Technological Institute, F160, 2145 Sheridan Road, Evanston, IL 60208 map it

Audience: Faculty/Staff - Student - Public - Post Docs/Docs - Graduate Students

Contact: Pamela Villalovoz   847.491.3644

Group: Physics and Astronomy Astrophysics Seminars

Category: Academic

Description:

The physics of dark matter and dark energy influences cosmological structure growth over a wide range of distance scales. Observational measurements of the large-scale structure of galaxies therefore provide a laboratory to study the physics of the dark sector, and near-future galaxy surveys such as the Large Synoptic Survey Telescope (LSST) and the Dark Energy Spectroscopic Instrument (DESI) have potential to place percent-level constraints on the standard cosmological model. Systematic uncertainty in our ability to model the physics of galaxy formation has emerged as one of the leading challenges to this program. I will discuss ongoing work on a new approach to cosmological inference, in which forward-models of the galaxy-halo connection are grafted directly into some of the world's largest cosmological simulations, and the likelihood function of a multi-probe analysis is emulated using machine learning techniques. I will describe the connection between this effort and traditional semi-analytic models and hydrodynamical simulations, and outline a program to realize the potential of Stage IV dark energy experiments with the next generation of supercomputers.

 

Speaker: Andrew Hearin, Argonne National Laboratory

Host: Luke Kelley

 

 

Keywords: Physics, Astronomy, Astrophysics

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