publication . Article . Other literature type . 1977

Dynamics of Extended Bodies in General Relativity Center-of-Mass Description and Quasirigidity

Ehlers, J.; Rudolph, E.;
Open Access
  • Published: 01 Mar 1977 Journal: General Relativity and Gravitation, volume 8, pages 197-217 (issn: 0001-7701, eissn: 1572-9532, Copyright policy)
  • Publisher: Springer Science and Business Media LLC
Abstract
Dixon's approach to describe the dynamics of extended bodies in metric theories of gravity is elaborated. The exact, general relation between the center-of-mass 4-velocity and the 4-momentum is derived. Quasirigid bodies are defined, and their equations of motion are shown to be determinate for a given metric. Multipole approximations are considered, and the physical meaning of quasirigidity is investigated by establishing an approximate connection with continuum mechanics.
Subjects
free text keywords: Physics and Astronomy (miscellaneous)
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