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dc.contributor.authorBanik, Indranil
dc.contributor.authorKroupa, Pavel
dc.date.accessioned2021-10-13T11:30:07Z
dc.date.available2021-10-13T11:30:07Z
dc.date.issued2020-09
dc.identifier276205577
dc.identifierba8cd9d6-52a7-4a54-beee-ba765b956f9a
dc.identifier85100870641
dc.identifier.citationBanik , I & Kroupa , P 2020 , ' Scale-invariant dynamics in the Solar system ' , Monthly Notices of the Royal Astronomical Society: Letters , vol. 497 , no. 1 , pp. L62-L66 . https://doi.org/10.1093/MNRASL/SLAA113en
dc.identifier.issn1745-3925
dc.identifier.otherORCID: /0000-0002-4123-7325/work/101218050
dc.identifier.urihttps://hdl.handle.net/10023/24119
dc.descriptionIB is supported by an Alexander von Humboldt post-doctoral research fellowship.en
dc.description.abstractThe covariant scale-invariant dynamics (SID) theory has recently been proposed as a possible explanation for the observed dynamical discrepancies in galaxies. SID implies that these discrepancies - commonly attributed to dark matter - arise instead from a non-standard velocity-dependent force that causes two-body near-Keplerian orbits to expand. We show that the predicted expansion of the Earth-Moon orbit is incompatible with lunar laser ranging data at >200σ. Moreover, SID predicts that the gravitating mass of any object was much smaller in the past. If true, a low-mass red giant star must be significantly older than in standard theory. This would make it much older than the conventional age of the Universe, which, however, is expected to be similarly old in SID. Moreover, it is not completely clear whether SID truly contains new physics beyond general relativity, with several previous works arguing that the extra degree of freedom is purely mathematical. We conclude that the SID model is falsified at high significance by observations across a range of scales, even if it is theoretically well formulated.
dc.format.extent5
dc.format.extent209552
dc.language.isoeng
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society: Lettersen
dc.subjectDark matteren
dc.subjectEphemeridesen
dc.subjectGravitationen
dc.subjectMoonen
dc.subjectSpace vehiclesen
dc.subjectQB Astronomyen
dc.subjectQC Physicsen
dc.subjectSpace and Planetary Scienceen
dc.subjectAstronomy and Astrophysicsen
dc.subjectT-DASen
dc.subject.lccQBen
dc.subject.lccQCen
dc.titleScale-invariant dynamics in the Solar systemen
dc.typeJournal articleen
dc.contributor.institutionUniversity of St Andrews. School of Physics and Astronomyen
dc.identifier.doi10.1093/MNRASL/SLAA113
dc.description.statusPeer revieweden
dc.identifier.urlhttps://arxiv.org/abs/2007.00654en


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