Detailed Information on Publication Record
2021
Geodesic structure of the accelerated stephani universe
BORMOTOVA, Iryna, Olena KOPTĚVA and Zdeněk STUCHLÍKBasic information
Original name
Geodesic structure of the accelerated stephani universe
Authors
BORMOTOVA, Iryna (804 Ukraine, belonging to the institution), Olena KOPTĚVA (804 Ukraine, belonging to the institution) and Zdeněk STUCHLÍK (203 Czech Republic, belonging to the institution)
Edition
Symmetry, 2021, 2073-8994
Other information
Language
English
Type of outcome
Článek v odborném periodiku
Field of Study
10308 Astronomy
Country of publisher
Switzerland
Confidentiality degree
není předmětem státního či obchodního tajemství
References:
RIV identification code
RIV/47813059:19630/21:A0000157
Organization unit
Institute of physics in Opava
UT WoS
000665927500001
Keywords in English
inhomogeneous cosmology;spherical symmetry;Stephani solution;accelerated expansion;geodesic equations
Tags
International impact, Reviewed
Změněno: 23/2/2022 14:14, Mgr. Pavlína Jalůvková
Abstract
V originále
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.