Causality Bounds on Dissipative General-Relativistic Magnetohydrodynamics

被引：1

作者：

Cordeiro, Ian ^{[1
]}

Speranza, Enrico ^{[1
,2
]}

Ingles, Kevin ^{[1
]}

Bemfica, Fabio S. ^{[3
]}

Noronha, Jorge ^{[1
]}

机构：

[1] Univ Illinois, Illinois Ctr Adv Studies Universe, Dept Phys, Urbana, IL 61801 USA

[2] CERN, Theoret Phys Dept, CH-1211 Geneva 23, Switzerland

[3] Univ Fed Rio Grande do Norte, Escola Ciencias & Tecnol, BR-59072970 Natal, RN, Brazil

来源：

PHYSICAL REVIEW LETTERS | 2024年 / 133卷 / 09期

基金：

美国国家科学基金会;

关键词：

TELESCOPE RESULTS. I; MAGNETOROTATIONAL INSTABILITY; THERMODYNAMICS; ACCRETION; SIMULATIONS; SHADOW;

D O I：

10.1103/PhysRevLett.133.091401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We derive necessary and sufficient conditions under which a large class of relativistic generalizations of Braginskii's magnetohydrodynamics with shear, bulk, and heat diffusion effects is causal and strongly hyperbolic in the fully nonlinear regime in curved spacetime. We find that causality severely constrains the size of nonideal effects and the onset of kinetic instabilities. Our results are crucial for assessing the regime of validity of fluid dynamical simulations of plasmas near supermassive black holes.

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页数：7

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