The impact of the oblateness of Regulus on the motion of its companion

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dc.creatorIorio, Lorenzo
dc.date2008-07-26
dc.date2008-08-20
dc.date.accessioned2026-07-07T12:15:07Z
dc.date.available2026-07-07T12:15:07Z
dc.descriptionThe fast spinning B-star Regulus has recently been found to be orbited by a fainter companion in a close circular path with orbital period P_b = 40.11(2) d. Being its equatorial radius R_e 32% larger than the polar one R_p, Regulus possesses a remarkable quadrupole mass moment Q. We investigate the effects of Q on the orbital period P_b of its companion in order to see if they are measurable, given the present-day level of accuracy in measuring P_b. Conversely, we will look for deviations from the third Kepler law, attributed to the quadrupole mass moment Q of Regulus, to constrain the ratio γ=m/M of the system's masses.
dc.descriptionLaTex, 6 pages, 5 figures, 1 table. Accepted by Astrophysics and Space Science
dc.identifierhttps://arxiv.org/abs/0807.4221
dc.identifierhttp://arxiv.org/abs/0807.4221
dc.identifierAstrophys.SpaceSci.318:51-55,2008
dc.identifierdoi:10.1007/s10509-008-9889-1
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/211413
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectAstrophysics
dc.subjectSpace Physics
dc.titleThe impact of the oblateness of Regulus on the motion of its companion
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