Post-Newtonian limit of Finsler space theories of gravity and solar system tests

1992 ◽  
Vol 24 (4) ◽  
pp. 419-431 ◽  
Author(s):  
Ian W. Roxburgh
Keyword(s):  
Solar System ◽  
Finsler Space ◽  
Newtonian Limit ◽  
Theories Of Gravity

scholarly journals Testing the Vainshtein mechanism using stars and galaxies

2015 ◽  
Vol 24 (12) ◽  
pp. 1544021 ◽  
Author(s):  
Jeremy Sakstein ◽  
Kazuya Koyama
Keyword(s):  
General Relativity ◽  
Solar System ◽  
Main Sequence ◽  
Alternative Theories Of Gravity ◽  
The Novel ◽  
Main Sequence Stars ◽  
Cosmic Expansion ◽  
Astrophysical Objects ◽  
Theories Of Gravity ◽  
Alternative Theories

The Vainshtein mechanism is of paramount importance in many alternative theories of gravity. It hides deviations from general relativity (GR) in the solar system while allowing them to drive the acceleration of the cosmic expansion. Recently, a class of theories have emerged where the mechanism is broken inside astrophysical objects. In this essay, we look for novel probes of these theories by deriving the modified properties of stars and galaxies. We show that main-sequence stars are colder, less luminous and more ephemeral than GR predicts. Furthermore, the circular velocities of objects orbiting inside galaxies are slower and the lensing of light is weaker. We discuss the prospects for testing these theories using the novel phenomena presented here in light of current astrophysical surveys.

scholarly journals The post-Newtonian limit of hybrid f(R)-gravity

2018 ◽  
Vol 191 ◽  
pp. 07009 ◽  
Author(s):  
Polina Dyadina ◽  
Sofya Labazova
Keyword(s):  
Solar System ◽  
Weak Field ◽  
Newtonian Limit ◽  
Field Limit ◽  
Weak Field Limit

The post-Newtonian formalism is developed for hybrid f(R)-gravity. The model is tested in the weak field regime of the Solar System. Using scalartensor representation of hybrid f(R)-gravity we impose restrictions on the parameters of the theory and show that hybrid f(R)-gravity is not ruled out by the observations in the weak field limit.

scholarly journals The parameterized post-Newtonian limit of bimetric theories of gravity

2010 ◽  
Vol 27 (23) ◽  
pp. 235020 ◽  
Author(s):  
Timothy Clifton ◽  
Máximo Bañados ◽  
Constantinos Skordis
Keyword(s):  
Newtonian Limit ◽  
Theories Of Gravity

scholarly journals Constraining scalar-tensor gravity models by S2 star orbits around the galactic center

2019 ◽  
Vol 17 (1, spec.issue) ◽  
pp. 11-20
Author(s):  
Vesna Borka-Jovanovic ◽  
Predrag Jovanovic ◽  
Dusko Borka ◽  
Salvatore Capozziello ◽  
Stefania Gravina ◽  
...  
Keyword(s):  
General Relativity ◽  
Black Hole ◽  
Galactic Center ◽  
Newtonian Limit ◽  
Gravity Models ◽  
Kinematics And Dynamics ◽  
Supermassive Black Hole ◽  
Theories Of Gravity ◽  
Orbital Precession ◽  
Best Fit

The aim of our investigation is to derive a particular theory among the class of scalar-tensor(ST) theories of gravity, and then to test it by studying kinematics and dynamics of S-stars around a supermassive black hole (BH) at Galactic Center (GC). We also discuss the Newtonian limit of this class of ST theories of gravity, as well as its parameters. We compare the observed orbit of S2 star with our simulated orbit which we obtained theoretically with the derived ST potential and constrained parameters. Using the obtained best-fit parameters we calculated orbital precession of S2 star in ST gravity and found that it has the same direction as in General Relativity (GR) but causes much larger pericenter shift.

scholarly journals Solar System planetary orbital motions andf(R) theories of gravity

2007 ◽  
Vol 2007 (01) ◽  
pp. 010-010 ◽  
Author(s):  
Matteo Luca Ruggiero ◽  
Lorenzo Iorio
Keyword(s):  
Solar System ◽  
Theories Of Gravity

scholarly journals Gravitoelectromagnetism, Solar System Tests, and Weak-Field Solutions in f (T,B) Gravity with Observational Constraints

Universe ◽  
2020 ◽  
Vol 6 (2) ◽  
pp. 34 ◽  
Author(s):  
Gabriel Farrugia ◽  
Jackson Levi Said ◽  
Andrew Finch
Keyword(s):  
Solar System ◽  
Teleparallel Gravity ◽  
Weak Field ◽  
Observational Constraints ◽  
Field Limit ◽  
Potential Models ◽  
Weak Field Limit ◽  
Rotating Systems ◽  
Theories Of Gravity ◽  
Analogous Effect

Gravitomagnetism characterizes phenomena in the weak-field limit within the context of rotating systems. These are mainly manifested in the geodetic and Lense-Thirring effects. The geodetic effect describes the precession of the spin of a gyroscope in orbit about a massive static central object, while the Lense-Thirring effect expresses the analogous effect for the precession of the orbit about a rotating source. In this work, we explore these effects in the framework of Teleparallel Gravity and investigate how these effects may impact recent and future missions. We find that teleparallel theories of gravity may have an important impact on these effects which may constrain potential models within these theories.

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