Rn gravity as a viable alternative to dark matter: Application to stellar dynamics
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© Cambridge Scientific Publishers and 2018 Astronomical and Astrophysical Transactions (AApTr)
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The role of f(R) gravity, as well as the other modifications of standard Einstein’s gravity, is to explain the accelerated expansion, structure formation of the Universe, and some other phenomena at extragalactic scales (such as e.g. flat rotation curves of spiral galaxies) without adding unknown forms of dark energy or dark matter. In f(R) model, the Ricci scalar in the Einstein–Hilbert action is replaced by a general function of it. Its power-law form Rn is analyzed here using observed orbits of S-stars around the Galactic Center and also their computer simulations. We review the various consequences of the Rn gravity parameters (rc, the characteristic radius, i.e. the scalelength depending on the gravitating system properties; and β, the universal constant) on stellar dynamics and investigate their constraints from the observed S-star orbits. The presented results show that these observations could put reliable constraints on the parameters of Rn gravity.
Кључне речи:
experimental tests of gravitational theories / modified theories of gravityИзвор:
Astronomical and Astrophysical Transactions, 2018, 30, 3, 351-358Финансирање / пројекти:
- Гравитација и структура космоса на великим скалама (RS-176003)
- Istituto Nazionale di Fisica Nucleare, Sezione di Napoli, Italy, iniziative specifiche TEONGRAV and QGSKY (S.C.)
- Bilateral cooperation between Serbia and Italy (451-03-01231/2015-09/1 “Testing Extended Theories of Gravity at different astrophysical scales”)
- COST Action (CA15117 - CANTATA)
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VinčaTY - JOUR AU - Borka Jovanović, Vesna AU - Jovanović, Predrag AU - Borka, Duško AU - Capozziello, Salvatore PY - 2018 UR - https://vinar.vin.bg.ac.rs/handle/123456789/7781 AB - The role of f(R) gravity, as well as the other modifications of standard Einstein’s gravity, is to explain the accelerated expansion, structure formation of the Universe, and some other phenomena at extragalactic scales (such as e.g. flat rotation curves of spiral galaxies) without adding unknown forms of dark energy or dark matter. In f(R) model, the Ricci scalar in the Einstein–Hilbert action is replaced by a general function of it. Its power-law form Rn is analyzed here using observed orbits of S-stars around the Galactic Center and also their computer simulations. We review the various consequences of the Rn gravity parameters (rc, the characteristic radius, i.e. the scalelength depending on the gravitating system properties; and β, the universal constant) on stellar dynamics and investigate their constraints from the observed S-star orbits. The presented results show that these observations could put reliable constraints on the parameters of Rn gravity. T2 - Astronomical and Astrophysical Transactions T1 - Rn gravity as a viable alternative to dark matter: Application to stellar dynamics VL - 30 IS - 3 SP - 351 EP - 358 UR - https://hdl.handle.net/21.15107/rcub_vinar_7781 ER -
@article{ author = "Borka Jovanović, Vesna and Jovanović, Predrag and Borka, Duško and Capozziello, Salvatore", year = "2018", abstract = "The role of f(R) gravity, as well as the other modifications of standard Einstein’s gravity, is to explain the accelerated expansion, structure formation of the Universe, and some other phenomena at extragalactic scales (such as e.g. flat rotation curves of spiral galaxies) without adding unknown forms of dark energy or dark matter. In f(R) model, the Ricci scalar in the Einstein–Hilbert action is replaced by a general function of it. Its power-law form Rn is analyzed here using observed orbits of S-stars around the Galactic Center and also their computer simulations. We review the various consequences of the Rn gravity parameters (rc, the characteristic radius, i.e. the scalelength depending on the gravitating system properties; and β, the universal constant) on stellar dynamics and investigate their constraints from the observed S-star orbits. The presented results show that these observations could put reliable constraints on the parameters of Rn gravity.", journal = "Astronomical and Astrophysical Transactions", title = "Rn gravity as a viable alternative to dark matter: Application to stellar dynamics", volume = "30", number = "3", pages = "351-358", url = "https://hdl.handle.net/21.15107/rcub_vinar_7781" }
Borka Jovanović, V., Jovanović, P., Borka, D.,& Capozziello, S.. (2018). Rn gravity as a viable alternative to dark matter: Application to stellar dynamics. in Astronomical and Astrophysical Transactions, 30(3), 351-358. https://hdl.handle.net/21.15107/rcub_vinar_7781
Borka Jovanović V, Jovanović P, Borka D, Capozziello S. Rn gravity as a viable alternative to dark matter: Application to stellar dynamics. in Astronomical and Astrophysical Transactions. 2018;30(3):351-358. https://hdl.handle.net/21.15107/rcub_vinar_7781 .
Borka Jovanović, Vesna, Jovanović, Predrag, Borka, Duško, Capozziello, Salvatore, "Rn gravity as a viable alternative to dark matter: Application to stellar dynamics" in Astronomical and Astrophysical Transactions, 30, no. 3 (2018):351-358, https://hdl.handle.net/21.15107/rcub_vinar_7781 .