The SOPHIE search for northern extrasolar planets: XVI. HD 158259: A compact planetary system in a near-3:2 mean motion resonance chain

dc.contributor.authorHara, N. C.
dc.contributor.authorBouchy, F.
dc.contributor.authorStalport, M.
dc.contributor.authorBoisse, I
dc.contributor.authorRodrigues, J.
dc.contributor.authorDelisle, J-B
dc.contributor.authorSanterne, A.
dc.contributor.authorHenry, G. W.
dc.contributor.authorArnold, L.
dc.contributor.authorAstudillo-Defru, N.
dc.contributor.authorBorgniet, S.
dc.contributor.authorBonfils, X.
dc.contributor.authorBourrier, V
dc.contributor.authorBrugger, B.
dc.contributor.authorCourcol, B.
dc.contributor.authorDalal, S.
dc.contributor.authorDeleuil, M.
dc.contributor.authorDelfosse, X.
dc.contributor.authorDemangeon, O.
dc.contributor.authorDiaz, R. F.
dc.contributor.authorDumusque, X.
dc.contributor.authorForveille, T.
dc.contributor.authorHebrard, G.
dc.contributor.authorHobson, M.
dc.contributor.authorKiefer, F.
dc.contributor.authorLopez, T.
dc.contributor.authorMignon, L.
dc.contributor.authorMousis, O.
dc.contributor.authorMoutou, C.
dc.contributor.authorPepe, F.
dc.contributor.authorRey, J.
dc.contributor.authorSantos, N. C.
dc.contributor.authorSegransan, D.
dc.contributor.authorUdry, S.
dc.contributor.authorWilson, P. A.
dc.date.accessioned2025-01-23T19:52:10Z
dc.date.available2025-01-23T19:52:10Z
dc.date.issued2020
dc.description.abstractAims. Since 2011, the SOPHIE spectrograph has been used to search for Neptunes and super-Earths in the northern hemisphere. As part of this observational program, 290 radial velocity measurements of the 6.4 V magnitude star HD 158259 were obtained. Additionally, TESS photometric measurements of this target are available. We present an analysis of the SOPHIE data and compare our results with the output of the TESS pipeline.Methods. The radial velocity data, ancillary spectroscopic indices, and ground-based photometric measurements were analyzed with classical and l(1) periodograms. The stellar activity was modeled as a correlated Gaussian noise and its impact on the planet detection was measured with a new technique.Results. The SOPHIE data support the detection of five planets, each with m sin i approximate to 6 M-circle plus, orbiting HD 158259 in 3.4, 5.2, 7.9, 12, and 17.4 days. Though a planetary origin is strongly favored, the 17.4 d signal is classified as a planet candidate due to a slightly lower statistical significance and to its proximity to the expected stellar rotation period. The data also present low frequency variations, most likely originating from a magnetic cycle and instrument systematics. Furthermore, the TESS pipeline reports a significant signal at 2.17 days corresponding to a planet of radius approximate to 1.2 R-circle plus. A compatible signal is seen in the radial velocities, which confirms the detection of an additional planet and yields a approximate to 2 M-circle plus mass estimate.Conclusions. We find a system of five planets and a strong candidate near a 3:2 mean motion resonance chain orbiting HD 158259. The planets are found to be outside of the two and three body resonances.
dc.fuente.origenWOS
dc.identifier.doi10.1051/0004-6361/201937254
dc.identifier.eissn1432-0746
dc.identifier.issn0004-6361
dc.identifier.urihttps://doi.org/10.1051/0004-6361/201937254
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/100620
dc.identifier.wosidWOS:000528573300002
dc.language.isoen
dc.revistaAstronomy & astrophysics
dc.rightsacceso restringido
dc.subjectplanets and satellites: detection
dc.subjectplanets and satellites: dynamical evolution and stability
dc.subjectplanets and satellites: fundamental parameters
dc.subjectplanets and satellites: formation
dc.subjectmethods: statistical
dc.subjecttechniques: radial velocities
dc.subject.ods13 Climate Action
dc.subject.odspa13 Acción por el clima
dc.titleThe SOPHIE search for northern extrasolar planets: XVI. HD 158259: A compact planetary system in a near-3:2 mean motion resonance chain
dc.typeartículo
dc.volumen636
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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