Constraints on R-n gravity from precession of orbits of S2-like stars
Апстракт
We study some possible observational signatures of R-n gravity at Galactic scales and how these signatures could be used for constraining this type of f(R) gravity. For that purpose, we performed two-body simulations in the R-n gravity potential and analyzed the obtained trajectories of S2-like stars around the Galactic center, as well as the resulting parameter space of the Rn gravity potential. Here, we discuss the constraints on Rn gravity which can be obtained from the observations of orbits of S2-like stars with the present and next generations of large telescopes. We make comparisons between the theoretical results and observations. Our results show that the most probable value for the parameter r(c) in the Rn gravity potential in the case of S2-like stars is similar to 100 AU, while the universal parameter beta is close to 0.01. Also, the gravity potential induces the precession of S2-like star orbits in the opposite direction with respect to general relativity; therefore, such ...a behavior of orbits is qualitatively similar to the behavior of Newtonian orbits with a bulk distribution of matter (including a stellar cluster and dark matter distributions).
Извор:
Physical Review D, 2012, 85, 12Финансирање / пројекти:
DOI: 10.1103/PhysRevD.85.124004
ISSN: 1550-7998
WoS: 000304750000012
Scopus: 2-s2.0-84862274661
Колекције
Институција/група
VinčaTY - JOUR AU - Borka, Duško AU - Jovanović, Predrag AU - Borka Jovanović, Vesna AU - Zakharov, Alexander F. PY - 2012 UR - https://vinar.vin.bg.ac.rs/handle/123456789/4868 AB - We study some possible observational signatures of R-n gravity at Galactic scales and how these signatures could be used for constraining this type of f(R) gravity. For that purpose, we performed two-body simulations in the R-n gravity potential and analyzed the obtained trajectories of S2-like stars around the Galactic center, as well as the resulting parameter space of the Rn gravity potential. Here, we discuss the constraints on Rn gravity which can be obtained from the observations of orbits of S2-like stars with the present and next generations of large telescopes. We make comparisons between the theoretical results and observations. Our results show that the most probable value for the parameter r(c) in the Rn gravity potential in the case of S2-like stars is similar to 100 AU, while the universal parameter beta is close to 0.01. Also, the gravity potential induces the precession of S2-like star orbits in the opposite direction with respect to general relativity; therefore, such a behavior of orbits is qualitatively similar to the behavior of Newtonian orbits with a bulk distribution of matter (including a stellar cluster and dark matter distributions). T2 - Physical Review D T1 - Constraints on R-n gravity from precession of orbits of S2-like stars VL - 85 IS - 12 DO - 10.1103/PhysRevD.85.124004 ER -
@article{ author = "Borka, Duško and Jovanović, Predrag and Borka Jovanović, Vesna and Zakharov, Alexander F.", year = "2012", abstract = "We study some possible observational signatures of R-n gravity at Galactic scales and how these signatures could be used for constraining this type of f(R) gravity. For that purpose, we performed two-body simulations in the R-n gravity potential and analyzed the obtained trajectories of S2-like stars around the Galactic center, as well as the resulting parameter space of the Rn gravity potential. Here, we discuss the constraints on Rn gravity which can be obtained from the observations of orbits of S2-like stars with the present and next generations of large telescopes. We make comparisons between the theoretical results and observations. Our results show that the most probable value for the parameter r(c) in the Rn gravity potential in the case of S2-like stars is similar to 100 AU, while the universal parameter beta is close to 0.01. Also, the gravity potential induces the precession of S2-like star orbits in the opposite direction with respect to general relativity; therefore, such a behavior of orbits is qualitatively similar to the behavior of Newtonian orbits with a bulk distribution of matter (including a stellar cluster and dark matter distributions).", journal = "Physical Review D", title = "Constraints on R-n gravity from precession of orbits of S2-like stars", volume = "85", number = "12", doi = "10.1103/PhysRevD.85.124004" }
Borka, D., Jovanović, P., Borka Jovanović, V.,& Zakharov, A. F.. (2012). Constraints on R-n gravity from precession of orbits of S2-like stars. in Physical Review D, 85(12). https://doi.org/10.1103/PhysRevD.85.124004
Borka D, Jovanović P, Borka Jovanović V, Zakharov AF. Constraints on R-n gravity from precession of orbits of S2-like stars. in Physical Review D. 2012;85(12). doi:10.1103/PhysRevD.85.124004 .
Borka, Duško, Jovanović, Predrag, Borka Jovanović, Vesna, Zakharov, Alexander F., "Constraints on R-n gravity from precession of orbits of S2-like stars" in Physical Review D, 85, no. 12 (2012), https://doi.org/10.1103/PhysRevD.85.124004 . .