New numerical framework for the generalized Baumgarte-Shapiro-Shibata-Nakamura formulation: The vacuum case for spherical symmetry

被引：6

作者：

Alcoforado, M. A. ^{[1
]}

Aranha, R. F. ^{[1
]}

Barreto, W. O. ^{[1
,2
]}

de Oliveira, H. P. ^{[1
]}

机构：

[1] Univ Estado Rio de Janeiro, Dept Fis Teor, Rua Sao Francisco Xavier 524, BR-20550013 Rio De Janeiro, RJ, Brazil

[2] Univ Los Andes, Ctr Fis Fundamental, Merida 5101, Venezuela

来源：

PHYSICAL REVIEW D | 2021年 / 104卷 / 08期

关键词：

D O I：

10.1103/PhysRevD.104.084065

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Here we report a developed high performance and simplified version of the code denominated RIO, which can be easily extended, for the generalized BSSN formulation. We implement a code which is regular at the center of symmetry, without use a special procedure for regularization, as usual. We get exponential convergence for constraints. The numerical algorithm is based on the Galerkin-Collocation method developed successfully for diverse physical scenarios by the Numerical Relativity Group at UERJ. For the sake of clarity in presentation, we consider here the most simple case to display the most salient features of the procedure. Thus, we focus on the definite tests of the new numerical framework. The timing and performance of the code show that we can reach a better accuracy close to the machine precision, for the Hamiltonian and momentum constraints. RIO will be an open source code; currently it is under continuous development to consider more general and realistic problems.

引用

页数：10

共 54 条

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