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dc.contributor.authorBanik, Indranil
dc.contributor.authorKroupa, Pavel
dc.date.accessioned2021-10-13T12:30:11Z
dc.date.available2021-10-13T12:30:11Z
dc.date.issued2020-07
dc.identifier276205842
dc.identifier6540c6e8-9efd-454f-b518-3a58643f1782
dc.identifier85091412261
dc.identifier.citationBanik , I & Kroupa , P 2020 , ' Solar system limits on gravitational dipoles ' , Monthly Notices of the Royal Astronomical Society , vol. 495 , no. 4 , pp. 3974-3980 . https://doi.org/10.1093/MNRAS/STAA1447en
dc.identifier.issn0035-8711
dc.identifier.otherORCID: /0000-0002-4123-7325/work/101218061
dc.identifier.urihttps://hdl.handle.net/10023/24124
dc.descriptionFunding Information: IB is supported by an Alexander von Humboldt postdoctoral research fellowship.en
dc.description.abstractThe gravitational dipole theory of Hadjukovic (2010) is based on the hypothesis that antimatter has a negative gravitational mass and thus falls upwards on the Earth. Astrophysically, the model is similar to but more fundamental than Modified Newtonian Dynamics (MOND), with the Newtonian gravity gN towards an isolated point mass boosted by the factor ν = 1 + (α/x) tanh (√x/α) where x = gN/a0 and a0 = 1.2 × 10-10ms-2 is the MOND acceleration constant. We show that α must lie in the range 0.4.1 to acceptably fit galaxy rotation curves. In the Solar System, this interpolating function implies an extra Sunwards acceleration of αa0 . This would cause Saturn to deviate from Newtonian expectations by 7000(α/0.4) km over 15 yr, starting from known initial position and velocity on a near-circular orbit.We demonstrate that this prediction should not be significantly altered by the postulated dipole haloes of other planets due to the rather small region in which each planet fs gravity dominates over that of the Sun. The orbit of Saturn should similarly be little affected by a possible ninth planet in the outer Solar System and by the Galactic gravity causing a non-spherical distribution of gravitational dipoles several kAU from the Sun. Radio tracking of the Cassini spacecraft orbiting Saturn yields a 5σ upper limit of 160 m on deviations from its conventionally calculated trajectory. Thesemeasurements imply amuch more stringent upper limit on α than theminimum required for consistency with rotation curve data. Therefore, no value of α can simultaneously match all available constraints, falsifying the gravitational dipole theory in its current form at extremely high significance.
dc.format.extent7
dc.format.extent389603
dc.language.isoeng
dc.relation.ispartofMonthly Notices of the Royal Astronomical Societyen
dc.subjectCelestial mechanicsen
dc.subjectDark matter.en
dc.subjectEphemeridesen
dc.subjectGravitationen
dc.subjectSolar neighbourhooden
dc.subjectSpace vehiclesen
dc.subjectQB Astronomyen
dc.subjectQC Physicsen
dc.subjectSpace and Planetary Scienceen
dc.subjectAstronomy and Astrophysicsen
dc.subjectNDASen
dc.subject.lccQBen
dc.subject.lccQCen
dc.titleSolar system limits on gravitational dipolesen
dc.typeJournal articleen
dc.contributor.institutionUniversity of St Andrews. School of Physics and Astronomyen
dc.identifier.doi10.1093/MNRAS/STAA1447
dc.description.statusPeer revieweden
dc.identifier.urlhttps://arxiv.org/abs/2006.06000en


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