Satellite Test of the Equivalence Principle as a Probe of Modified Newtonian Dynamics

Pereira, Jonas P.; Overduin, James; Poyneer, Alexander J.

doi:10.1103/physrevlett.117.071103

Cited by 10 publications

(8 citation statements)

References 23 publications

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“…In addition, when in drag-free, common mode accelerations can be measured with respect to the spacecraft reference frame to 10 −15 − 10 −12 ms −2 , well below the MOND (MOdified Newtonian Dynamics) acceleration scale a 0 . Based on this performance, STEP has recently been proposed for a test of MOND theories and of the Strong Equivalence Principle [316]. As discussed in section 3.1.2, alternative WEP tests in microgravity are also possible on ground laboratories such as the Bremen drop tower [299].…”

Section: Experiments With Macroscopic Masses In Spacementioning

confidence: 99%

Precision gravity tests and the Einstein Equivalence Principle

Tino

Cacciapuoti

Capozziello

et al. 2020

Progress in Particle and Nuclear Physics

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Section: Experiments With Macroscopic Masses In Spacementioning

confidence: 99%

Precision gravity tests and the Einstein Equivalence Principle

Tino

Cacciapuoti

Capozziello

et al. 2020

Progress in Particle and Nuclear Physics

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“…A significant amount of research has gone into studying the consequences of (1) in astrophysical systems [5][6][7][8][9][10][11][12][13][14][15][16]; how-ever, the lack of a fully-relativistic formulation of the theory makes it difficult to know the realm of the equation's validity. It was also attempted to derive the MOND formula from fundamental theory [17].…”

mentioning

confidence: 99%

Cosmology of the Galileon extension of Bekenstein’s theory of relativistic modified Newtonian dynamics

Złośnik

Skordis

2017

Phys. Rev. D

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A generalization of Bekenstein's Tensor-Vector-Scalar (TeVeS) model of modified gravity has recently been proposed as an alternative to dark matter. This model -which we will refer to as g-TeVeS -utilizes a Galileoninduced Vainshtein mechanism to suppress modifications to General Relativity in strong gravity regimes and so avoids the need to introduce the baroque kinetic terms that typically exist in relativistic models of Modified Newtonian Dynamics (MOND).We explore the behavior of this model in spacetimes with exact Friedmann-Robertson-Walker (FRW) symmetry. The ability of the theory to recover MOND phenomenology places restrictions on the theory's parameter space and it is found that within an estimate of this area of parameter space the theory cannot successfully approximate the Friedmannian cosmological behavior of cold dark matter. It is found that much closer agreement may be recovered in other regions of the theory's parameter space and the reasons for this are discussed. A. IntroductionMilgrom's observation [1] that a wide variety of the astrophysical phenomena usually attributed to the effects of dark matter can instead be accounted for by a modification to the dynamics of visible matter has provided an intriguing hint that something may be missing in our understanding of gravity and/or inertia. In its original formulation, Milgrom's Modified Newtonian Dynamics (MOND) was non-relativistic in the same sense that Newton's theory of gravity is. If Newtonian gravity is a limiting form of General Relativity, what is MOND a limiting form of? One formulation of MOND is as a modified Poisson equation:where Φ is the gravitational potential felt by non-relativistic test particles, x = | ∇Φ|/a 0 , ρ b is the density of baryonic matter, G N is the locally measured value of Newton's gravitational constant, a 0 is a constant with the dimensions of acceleration and µ m (x) is a function subject to the limiting forms µ m → 1 as x 1 and µ m → x as x 1 but is otherwise unspecified; an explicit form such as µ m (x) = x/(1 + x) has usually been chosen but such forms lack theoretical motivation 1 .A significant amount of research has gone into studying the consequences of (1) in astrophysical systems [5][6][7][8][9][10][11][12][13][14][15][16]; however, the lack of a fully-relativistic formulation of the theory makes it difficult to know the realm of the equation's validity. It was also attempted to derive the MOND formula from fundamental theory [17]. A number of relativistic theories that recover MOND-like phenomenology have been proposed [18][19][20][21][22][23][24][25][26][27][28]. All of these examples possess a similar ambiguity to (1) in that all possess a function in the Lagrangian that must be chosen by hand. This makes it difficult to know exactly what a given theory predicts. Each of the examples involve the introduction of new degrees of freedom into physics and it can be that the line between their interpretation as an additional 'dark force' in nature or simply a type of dark matter becomes blurred. Indeed, ...

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“…4 The reason for this is chiefly the possibility of allowing the system to run longer than when it is orbit, the possible enhancement of position sensitivities and the possibility of always eliminating Earth's gravity.…”

Section: Mond When the Sep Is Violatedmentioning

confidence: 99%

“…4 we have proposed a simple way to test MOND on Earth by means of the experiment-to-be called the Satellite Test of the Equivalence Principle (STEP), without any change of its current aspects. Its importance lies on the fact that to date there are no Earth-based scalar experiments of MOND, quite oppositely to dark matter (DM) particle experiments, such as PandaX (see Ref.…”

Section: Introductionmentioning

confidence: 99%