Testing long-distance modifications of gravity to 100 astronomical units

Buscaino, Brandon; DeBra, D.; Graham, Peter W.; Gratta, G.; Wiser, Timothy D.

doi:10.1103/physrevd.92.104048

Cited by 17 publications

(25 citation statements)

References 47 publications

(70 reference statements)

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“…Putting several clocks in a more distant orbit would increase T , lower minimal m φ and allow for a long-time common-view comparison with several ground clocks helping to identify the DM origin of the phase jump. Putting a precise atomic clock on a deep-space spacecraft, such as 100 AU mission [44] and comparing the clock frequency with a less DM-sensitive clock on ground would allow us to study very large DM inhomogeneities and hence very small m φ .…”

Section: Anomalies In the Allan Deviation Datamentioning

confidence: 99%

Extracting dark matter signatures from atomic clock stability measurements

Kalaydzhyan

2017

Phys. Rev. D

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We analyze possible effects of the dark matter environment on the atomic clock stability measurements. The dark matter is assumed to exist in a form of waves of ultralight scalar fields or in a form of topological defects (monopoles and strings). We identify dark matter signal signatures in clock Allan deviation plots that can be used to constrain the dark matter coupling to the Standard Model fields. The existing data on the Al + /Hg + clock comparison are used to put new limits on the dilaton dark matter in the region of masses m φ > 10 −15 eV. We also estimate the sensitivities of future atomic clock experiments in space, including the cesium microwave and strontium optical clocks aboard the International Space Station, as well as a potential nuclear clock. These experiments are expected to put new limits on the topological dark matter in the range of masses 10 −10 eV < m φ < 10 −6 eV.

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Section: Anomalies In the Allan Deviation Datamentioning

confidence: 99%

Extracting dark matter signatures from atomic clock stability measurements

Kalaydzhyan

2017

Phys. Rev. D

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“…Perhaps dedicated missions, such as ESA's Gaia mission that was launched in 2013, can measure the imprint of nonlocal gravity in the Solar System [27,28]. In this connection, we note that…”

Section: Modification Of the Inverse Square Force Lawmentioning

confidence: 78%

“…The deviation of the virial theorem in Equation (30) from the Newtonian result is contained in < D >, where D is given by Equation (28). More explicitly, we have…”

Section: Virial Theoremmentioning

confidence: 99%

Virial Theorem in Nonlocal Newtonian Gravity

Mashhoon

2016

Universe

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Nonlocal gravity is the recent classical nonlocal generalization of Einstein's theory of gravitation in which the past history of the gravitational field is taken into account. In this theory, nonlocality appears to simulate dark matter. The virial theorem for the Newtonian regime of nonlocal gravity theory is derived and its consequences for "isolated" astronomical systems in virial equilibrium at the present epoch are investigated. In particular, for a sufficiently isolated nearby galaxy in virial equilibrium, the galaxy's baryonic diameter D 0 -namely, the diameter of the smallest sphere that completely surrounds the baryonic system at the present time-is predicted to be larger than the effective dark matter fraction f DM times a universal length that is the basic nonlocality length scale λ 0 ≈ 3 ± 2 kpc.

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“…Following an idea put forth in Iorio (2013), its range residuals may, in principle, be used to put tighter constraints on the admissible locations of PX in the near-mid future; later, Buscaino et al (2015) proposed a dedicated deep-space mission aimed to test the currently accepted gravitational laws up to 100 au. For the sake of simplicity, we will investigate only the preferred orbital configuration by Batygin & Brown (2016a).…”

Section: The Potential Impact On New Horizons: a Preliminary Sensitivmentioning

confidence: 99%

Preliminary constraints on the location of the recently hypothesized new planet of the Solar System from planetary orbital dynamics

Iorio

2016

Astrophys Space Sci

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It has been recently proposed that the observed grouping of either the perihelia and the orbital planes of some observed distant Kuiper Belt Objects (KBOs) can be explained by the shepherding influence of a remote (150 au q X 350 au), still unseen massive object PX having planetary size (5 m ⊕ m X 20 m ⊕ ) and moving along an ecliptically inclined (22 deg I X 40 deg), eccentric (380 au a X 980 au) Heliocentric bound orbit located in space at 80 deg Ω X 120 deg and which is anti-aligned (120 deg ω X 160 deg) with those of the considered KBOs. The trajectory of Saturn is nowadays known at essentially the same accuracy level of the inner planets due to the telemetry of the Cassini spacecraft. Thus, the expected per-turbations̟,Ω due to PX on the Kronian apsidal and draconitic orbital motions are theoretically investigated to tentatively constrain the configuration space of PX itself. To this aim, we compare our predictions̟ theo ,Ω theo to the currently available experimental intervals of values ∆Ω obs , ∆̟ obs determined by astronomers in the recent past without explicitly modeling and solving for PX itself. As such, our results, despite being plausible and in agreement to a large extent with other constraints released in the literature, should be regarded as proof-of-principle investigations aimed to encourage more accurate analyses in future. It turns out that the admissible region in its configuration space is moderately narrow as far as its position along its orbit, reckoned by the true anomaly f X , is concerned, being concentrated around approximately 130 deg f X 240 deg. PX is certainly far from its perihelion ( f X = 0 deg), in agreement with other recent studies. The future analysis of the data from the ongoing New Horizons mission might be helpful in further constraining the scenario considered here for PX. Its impact on the spaceraft's range over a multi-year span is investigated with a preliminary sensitivity analysis.

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Testing long-distance modifications of gravity to 100 astronomical units

Cited by 17 publications

References 47 publications

Extracting dark matter signatures from atomic clock stability measurements

Extracting dark matter signatures from atomic clock stability measurements

Virial Theorem in Nonlocal Newtonian Gravity

Preliminary constraints on the location of the recently hypothesized new planet of the Solar System from planetary orbital dynamics

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