BORMOTOVA, Iryna, Olena KOPTĚVA a Zdeněk STUCHLÍK. Geodesic structure of the accelerated stephani universe. Symmetry. 2021, roč. 13, č. 6, s. "1001-1"-"1001-13", 13 s. ISSN 2073-8994. Dostupné z: https://dx.doi.org/10.3390/sym13061001. |
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@article{58625, author = {Bormotova, Iryna and Koptěva, Olena and Stuchlík, Zdeněk}, article_number = {6}, doi = {http://dx.doi.org/10.3390/sym13061001}, keywords = {inhomogeneous cosmology;spherical symmetry;Stephani solution;accelerated expansion;geodesic equations}, language = {eng}, issn = {2073-8994}, journal = {Symmetry}, title = {Geodesic structure of the accelerated stephani universe}, url = {https://www.mdpi.com/2073-8994/13/6/1001}, volume = {13}, year = {2021} }
TY - JOUR ID - 58625 AU - Bormotova, Iryna - Koptěva, Olena - Stuchlík, Zdeněk PY - 2021 TI - Geodesic structure of the accelerated stephani universe JF - Symmetry VL - 13 IS - 6 SP - "1001-1"-"1001-13" EP - "1001-1"-"1001-13" SN - 20738994 KW - inhomogeneous cosmology;spherical symmetry;Stephani solution;accelerated expansion;geodesic equations UR - https://www.mdpi.com/2073-8994/13/6/1001 N2 - 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. ER -
BORMOTOVA, Iryna, Olena KOPTĚVA a Zdeněk STUCHLÍK. Geodesic structure of the accelerated stephani universe. \textit{Symmetry}. 2021, roč.~13, č.~6, s.~''1001-1''-''1001-13'', 13 s. ISSN~2073-8994. Dostupné z: https://dx.doi.org/10.3390/sym13061001.
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