Shock-avoiding slicing conditions: Tests and calibrations

Autor:	Thomas W. Baumgarte, David Hilditch
Rok vydání:	2022
Předmět:	Astrophysics::High Energy Astrophysical Phenomena FOS: Physical sciences General Relativity and Quantum Cosmology (gr-qc) General Relativity and Quantum Cosmology
Zdroj:	Physical Review D. 106
ISSN:	2470-0029 2470-0010
Popis:	While the 1+log slicing condition has been extremely successful in numerous numerical relativity simulations, it is also known to develop "gauge-shocks" in some examples. Alternative "shock-avoiding" slicing conditions suggested by Alcubierre prevent these pathologies in those examples, but have not yet been explored and tested very broadly. In this paper we compare the performance of shock-avoiding slicing conditions with those of 1+log slicing for a number of "text-book" problems, including black holes and relativistic stars. While, in some simulations, the shock-avoiding slicing conditions feature some unusual properties and lead to more "gauge-dynamics" than the 1+log slicing condition, we find that they perform quite similarly in terms of stability and accuracy, and hence provide a very viable alternative to 1+log slicing. Comment: 10 pages, 11 figures
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::22d12cd06bd0d7cb56b9d8b7638ad822 https://doi.org/10.1103/physrevd.106.044014 Zobrazit plný text záznamu