Bulletin of the American Physical Society
APS March Meeting 2020
Volume 65, Number 1
Monday–Friday, March 2–6, 2020; Denver, Colorado
Session F38: Computation in the History of Physics
8:00 AM–10:24 AM,
Tuesday, March 3, 2020
Room: 607
Sponsoring
Units:
FHP DCOMP
Chair: Robert Crease, State Univ of NY - Stony Brook
Abstract: F38.00004 : Cosmology in Silico
Presenter:
Marie Gueguen
(University of Pittsburgh)
Author:
Marie Gueguen
(University of Pittsburgh)
This ubiquity of simulations in cosmology raises an important concern. Indeed, a few astrophysicists have insisted that simulations suffer from numerical artefacts that none of the traditional methods to assess their reliability have successfully detected. These artefacts significantly impact our ability to track the logical consequences of the physical model implemented. As a result, when simulations fail to reproduce observations, there is no tool available to determine whether this discrepancy stems from numerical artefacts or constitutes a genuine failed prediction, and thus a motivation to revise our models. Yet, not only this concern has been neglected, but the race to an ever-increased resolution and more realistic simulations have made the problem even more complex. In this talk, I present a new method for evaluating the reliability of cosmological simulations, based on the reasoning of these astrophysicists who have contested traditional procedures for verifying simulations.
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