Search for giant planets in M67 III. Excess of hot Jupiters in dense open clusters

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dc.contributor.authorBrucalassi, A.
dc.contributor.authorPasquini, v
dc.contributor.authorSaglia, R.
dc.contributor.authorRuiz, M. T.
dc.contributor.authorBonifacio, v
dc.contributor.authorLeão, I.
dc.contributor.authorMartins, B. L. Canto
dc.contributor.authorMedeiros, José Renan de
dc.contributor.authorBedin, L. R.
dc.contributor.authorBiazzo, v
dc.contributor.authorMelo, C.
dc.contributor.authorLovis, C.
dc.contributor.authorRandich, S.
dc.date.accessioned2020-05-28T13:26:39Z
dc.date.available2020-05-28T13:26:39Z
dc.date.issued2016
dc.description.resumoSince 2008 we used high-precision radial velocity (RV) measurements obtained with different telescopes to detect signatures of massive planets around main-sequence and evolved stars of the open cluster (OC) M67. We aimed to perform a long-term study on giant planet formation in open clusters and determine how this formation depends on stellar mass and chemical composition. A new hot Jupiter (HJ) around the main-sequence star YBP401 is reported in this work. An update of the RV measurements for the two HJ host-stars YBP1194 and YBP1514 is also discussed. Our sample of 66 main-sequence and turnoff stars includes 3 HJs, which indicates a high rate of HJs in this cluster (5.6+5.4-2.6% for single stars and 4.5%+4.5-2.5% for the full sample). This rate is much higher than what has been discovered in the field, either with RV surveys or by transits. High metallicity is not a cause for the excess of HJs in M67, nor can the excess be attributed to high stellar masses. When combining this rate with the non-zero eccentricity of the orbits, our results are qualitatively consistent with a HJ formation scenario dominated by strong encounters with other stars or binary companions and subsequent planet-planet scattering, as predicted by N-body simulations.pt_BR
dc.identifier.citationMEDEIROS, José Renan de et al. Search for giant planets in M67. Astronomy & Astrophysics (Berlin. Print), v. 592, p. L1, 2016. ISSN 1432-0746 versão online. DOI https://doi.org/10.1051/0004-6361/201527561. Disponível em: https://www.aanda.org/articles/aa/abs/2016/08/aa27561-15/aa27561-15.html. Acesso em: 28 maio 2020. Reproduzido com permissão da Astronomy & Astrophysics, © ESO.pt_BR
dc.identifier.doihttps://doi.org/10.1051/0004-6361/201527561
dc.identifier.issn0004-6361 (print), 1432-0746 (online)
dc.identifier.urihttps://repositorio.ufrn.br/jspui/handle/123456789/29089
dc.languageenpt_BR
dc.publisherEDP Sciencespt_BR
dc.subjectPlanets and satellites: gaseous planetspt_BR
dc.subjectTechniques: radial velocitiespt_BR
dc.titleSearch for giant planets in M67 III. Excess of hot Jupiters in dense open clusterspt_BR
dc.typearticlept_BR

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