Extended-body effects in cosmological spacetimes

Details Extended-body effects in cosmological spacetimes Extended-body effects in cosmological spacetimes

2007-06-20

arxiv.org/abs/0706.2909v2

Class.Quant.Grav.24:5161-5172,2007

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

14 pages, minor clarifications added

Scientific paper

10.1088/0264-9381/24/20/015

We study the dynamics of extended test bodies in flat Friedmann-Robertson-Walker spacetimes. It is shown that such objects can usually alter their inertial mass, spin, and center-of-mass trajectory purely through the use of internal deformations. Many of these effects do not have Newtonian analogs, and exist despite the presence of conserved momenta associated with the translational and rotational symmetries of the background.

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