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dc.contributor.authorRozelot, JP
dc.contributor.authorEren, Saliha
dc.date.accessioned2020-05-27T06:55:19Z
dc.date.available2020-05-27T06:55:19Z
dc.date.issued2019-11-08
dc.description.abstractDue to its oblateness, the Sun carries a solar quadrupole moment playing a key role at the crossroad of fundamental solar physics, astrometry and celestial mechanics. There is nowadays a general agreement on its order of magnitude ( ≈2×10-7 ), but its temporal dependence is still poorly known. Helioseismology led to a variation within the solar cycle by less than 0.04%, not yet confirmed by other means. Analysis of the perihelion precession of planetary orbits computed in the solar equatorial coordinate system, instead of the ecliptic coordinate system usually used, shows that a periodic variation of the J2 term rather than of a simple constant, must be considered. Gravity tests within the Planetary and Lunar Ephemerides provide a fruitful independent approach. Confronting results from three sets of Ephemerides computed at different periods of time, a variability dependence within the solar cycle can be evidenced. If this outcome is not fortuitous, such a finding suggests a quadratic fit, that can be explained through the variation of the rotation law with latitude and time.en_US
dc.identifier.citationRozelot, J.P.; Eren, S. (2019) Exploring the temporal variation of the solar quadrupole moment from relativistic gravitation contributions: A fortuitous circumstance?.<i> Advances in Space Research, 15,</i> 12, 2821-2827en_US
dc.identifier.cristinIDFRIDAID 1791677
dc.identifier.doi10.1016/j.asr.2019.10.040
dc.identifier.issn0273-1177
dc.identifier.issn1879-1948
dc.identifier.urihttps://hdl.handle.net/10037/18382
dc.language.isoengen_US
dc.publisherElsevieren_US
dc.relation.journalAdvances in Space Research
dc.rights.accessRightsopenAccessen_US
dc.rights.holder© 2019 COSPAR. Published by Elsevier Ltd. All rights reserveden_US
dc.subjectVDP::Mathematics and natural science: 400::Physics: 430::Astrophysics, astronomy: 438en_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Fysikk: 430::Astrofysikk, astronomi: 438en_US
dc.titleExploring the temporal variation of the solar quadrupole moment from relativistic gravitation contributions: A fortuitous circumstance?en_US
dc.type.versionacceptedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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