Constraints on f(R, ɸ) (Sanders-Like) Gravity Potential From Orbit of S2 Star
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We investigate the possibility to explain theoretically the S2 star orbital precession around the massive object at Galactic Centre using Extended Theories of Gravity, specifically f(R, φ) a Sanders-like gravitational potential in total absence of dark matter. To this aim an analytic fourth-order theory of gravity, non-minimally coupled with a massive scalar field is considered. The interaction term is given by an analytic functions f(R, φ) where R is the Ricci scalar and φ is the scalar field. We simulated orbit of S2 star around Galactic Centre in Sanders-like gravity potentials and compared it with NTT/VLT observations. We presented maps of reduced χ 2 over the {α − mφ} parameter space in the case of NTT/VLT observations. The approach we are proposing seems reliable to constrain modified gravity models at astronomical level.
Извор:
Publications of the Astronomical Observatory of Belgrade, 2017, 96, 205-210Финансирање / пројекти:
- Гравитација и структура космоса на великим скалама (RS-MESTD-Basic Research (BR or ON)-176003)
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VinčaTY - JOUR AU - Borka, Duško AU - Borka Jovanović, Vesna AU - Jovanović, Predrag AU - Capozziello, Salvatore PY - 2017 UR - https://vinar.vin.bg.ac.rs/handle/123456789/11897 AB - We investigate the possibility to explain theoretically the S2 star orbital precession around the massive object at Galactic Centre using Extended Theories of Gravity, specifically f(R, φ) a Sanders-like gravitational potential in total absence of dark matter. To this aim an analytic fourth-order theory of gravity, non-minimally coupled with a massive scalar field is considered. The interaction term is given by an analytic functions f(R, φ) where R is the Ricci scalar and φ is the scalar field. We simulated orbit of S2 star around Galactic Centre in Sanders-like gravity potentials and compared it with NTT/VLT observations. We presented maps of reduced χ 2 over the {α − mφ} parameter space in the case of NTT/VLT observations. The approach we are proposing seems reliable to constrain modified gravity models at astronomical level. T2 - Publications of the Astronomical Observatory of Belgrade T1 - Constraints on f(R, ɸ) (Sanders-Like) Gravity Potential From Orbit of S2 Star IS - 96 SP - 205 EP - 210 UR - https://hdl.handle.net/21.15107/rcub_vinar_11897 ER -
@article{ author = "Borka, Duško and Borka Jovanović, Vesna and Jovanović, Predrag and Capozziello, Salvatore", year = "2017", abstract = "We investigate the possibility to explain theoretically the S2 star orbital precession around the massive object at Galactic Centre using Extended Theories of Gravity, specifically f(R, φ) a Sanders-like gravitational potential in total absence of dark matter. To this aim an analytic fourth-order theory of gravity, non-minimally coupled with a massive scalar field is considered. The interaction term is given by an analytic functions f(R, φ) where R is the Ricci scalar and φ is the scalar field. We simulated orbit of S2 star around Galactic Centre in Sanders-like gravity potentials and compared it with NTT/VLT observations. We presented maps of reduced χ 2 over the {α − mφ} parameter space in the case of NTT/VLT observations. The approach we are proposing seems reliable to constrain modified gravity models at astronomical level.", journal = "Publications of the Astronomical Observatory of Belgrade", title = "Constraints on f(R, ɸ) (Sanders-Like) Gravity Potential From Orbit of S2 Star", number = "96", pages = "205-210", url = "https://hdl.handle.net/21.15107/rcub_vinar_11897" }
Borka, D., Borka Jovanović, V., Jovanović, P.,& Capozziello, S.. (2017). Constraints on f(R, ɸ) (Sanders-Like) Gravity Potential From Orbit of S2 Star. in Publications of the Astronomical Observatory of Belgrade(96), 205-210. https://hdl.handle.net/21.15107/rcub_vinar_11897
Borka D, Borka Jovanović V, Jovanović P, Capozziello S. Constraints on f(R, ɸ) (Sanders-Like) Gravity Potential From Orbit of S2 Star. in Publications of the Astronomical Observatory of Belgrade. 2017;(96):205-210. https://hdl.handle.net/21.15107/rcub_vinar_11897 .
Borka, Duško, Borka Jovanović, Vesna, Jovanović, Predrag, Capozziello, Salvatore, "Constraints on f(R, ɸ) (Sanders-Like) Gravity Potential From Orbit of S2 Star" in Publications of the Astronomical Observatory of Belgrade, no. 96 (2017):205-210, https://hdl.handle.net/21.15107/rcub_vinar_11897 .