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https://repositorio.ufrn.br/handle/123456789/29089| Título: | Search for giant planets in M67 III. Excess of hot Jupiters in dense open clusters |
| Autor(es): | Brucalassi, A. Pasquini, v Saglia, R. Ruiz, M. T. Bonifacio, v Leão, I. Martins, B. L. Canto Medeiros, José Renan de Bedin, L. R. Biazzo, v Melo, C. Lovis, C. Randich, S. |
| Palavras-chave: | Planets and satellites: gaseous planets;Techniques: radial velocities |
| Data do documento: | 2016 |
| Editor: | EDP Sciences |
| Referência: | MEDEIROS, 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. |
| Resumo: | Since 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. |
| URI: | https://repositorio.ufrn.br/jspui/handle/123456789/29089 |
| ISSN: | 0004-6361 (print), 1432-0746 (online) |
| Aparece nas coleções: | CCET - DFTE - Artigos publicados em periódicos |
Arquivos associados a este item:
| Arquivo | Descrição | Tamanho | Formato | |
|---|---|---|---|---|
| SearchForGiantPlanetsInM67_Medeiros_2016.pdf | 1,4 MB | Adobe PDF |  Visualizar/Abrir |
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