Relativistic Effects in Orbital Motion of the S-Stars at the Galactic Center
The Galactic Center star cluster, known as S-stars, is a perfect source of relativistic phenomena observations. The stars are located in the strong field of relativistic compact object Sgr A* and are moving with very high velocities at pericenters of their orbits. In this work we consider motion of...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2020-10-01
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| Series: | Universe |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2218-1997/6/10/177 |
| Summary: | The Galactic Center star cluster, known as S-stars, is a perfect source of relativistic phenomena observations. The stars are located in the strong field of relativistic compact object Sgr A* and are moving with very high velocities at pericenters of their orbits. In this work we consider motion of several S-stars by using the Parameterized Post-Newtonian (PPN) formalism of General Relativity (GR) and Post-Newtonian (PN) equations of motion of the Feynman’s quantum-field gravity theory, where the positive energy density of the gravity field can be measured via the relativistic pericenter shift. The PPN parameters <inline-formula><math display="inline"><semantics><mi>β</mi></semantics></math></inline-formula> and <inline-formula><math display="inline"><semantics><mi>γ</mi></semantics></math></inline-formula> are constrained using the S-stars data. The positive value of the <inline-formula><math display="inline"><semantics><msubsup><mi>T</mi><mi>g</mi><mn>00</mn></msubsup></semantics></math></inline-formula> component of the gravity energy–momentum tensor is confirmed for condition of S-stars motion. |
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| ISSN: | 2218-1997 |