| Literature DB >> 30237750 |
Gerhard Schäfer1, Piotr Jaranowski2.
Abstract
Hamiltonian formalisms provide powerful tools for the computation of approximate analytic solutions of the Einstein field equations. The post-Newtonian computations of the explicit analytic dynamics and motion of compact binaries are discussed within the most often applied Arnowitt-Deser-Misner formalism. The obtention of autonomous Hamiltonians is achieved by the transition to Routhians. Order reduction of higher derivative Hamiltonians results in standard Hamiltonians. Tetrad representation of general relativity is introduced for the tackling of compact binaries with spinning components. Configurations are treated where the absolute values of the spin vectors can be considered constant. Compact objects are modeled by use of Dirac delta functions and their derivatives. Consistency is achieved through transition to d-dimensional space and application of dimensional regularization. At the fourth post-Newtonian level, tail contributions to the binding energy show up. The conservative spin-dependent dynamics finds explicit presentation in Hamiltonian form through next-to-next-to-leading-order spin-orbit and spin1-spin2 couplings and to leading-order in the cubic and quartic in spin interactions. The radiation reaction dynamics is presented explicitly through the third-and-half post-Newtonian order for spinless objects, and, for spinning bodies, to leading-order in the spin-orbit and spin1-spin2 couplings. The most important historical issues get pointed out.Entities:
Keywords: Analytical and dimensional regularization; Canonical equations of motion; Classical spin and gravity; Compact binary systems; General relativity; Hamiltonian formalism; Radiation reaction and emission
Year: 2018 PMID: 30237750 PMCID: PMC6133045 DOI: 10.1007/s41114-018-0016-5
Source DB: PubMed Journal: Living Rev Relativ ISSN: 1433-8351 Impact factor: 40.429