Geodesic Structure of the Accelerated Stephani Universe

Symmetry

Zdeněk Stuchlík¹  Irina Bormotova¹  Elena Kopteva¹ 

[1] Research Centre for Theoretical Physics and Astrophysics, Institute of Physics, Silesian University in Opava, CZ-746 01 Opava, Czech Republic;

关键词: inhomogeneous cosmology;    spherical symmetry;    Stephani solution;    accelerated expansion;    geodesic equations;   

DOI  :  10.3390/sym13061001

来源: DOAJ

【 摘 要 】

For the spherically symmetric Stephani cosmological model with an accelerated expansion, we investigate the main scenarios of the test particle and photon motion. We show that a comoving observer sees an appropriate picture. In the case of purely radial motion, the radial velocity decreases slightly with time due to the universe expansion. Both particles and photons spiral out of the center when the radial coordinate is constant. In the case of the motion with arbitrary initial velocity, the observable radial distance to the test particle can increase under negative observable radial velocity.

【 授权许可】

Unknown