Utilizza questo identificativo per citare o creare un link a questo documento:
http://hdl.handle.net/20.500.12386/26003
Titolo: | Search for giant planets in M67: III. Excess of hot Jupiters in dense open clusters | Autori: | BRUCALASSI, ANNA Pasquini, L. Saglia, R. Ruiz, M.T. Bonifacio, P Leão, I. Canto Martins, B.L. De Medeiros, J.R. BEDIN, Luigi BIAZZO, Katia Melo, C. Lovis, C. RANDICH, Maria Sofia |
Data pubblicazione: | 2016 | Rivista: | ASTRONOMY & ASTROPHYSICS | Numero: | 592 | Da pagina:: | L1 | Abstract: | 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% for single stars and 4.5% 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: | http://hdl.handle.net/20.500.12386/26003 | URL: | https://www.aanda.org/articles/aa/abs/2016/08/aa27561-15/aa27561-15.html | ISSN: | 0004-6361 | DOI: | 10.1051/0004-6361/201527561 | Bibcode ADS: | 2016A&A...590A..78B | Fulltext: | open |
È visualizzato nelle collezioni: | 1.01 Articoli in rivista |
File in questo documento:
File | Descrizione | Dimensioni | Formato | |
---|---|---|---|---|
Brucalassietal2016.pdf | Pdf editoriale | 1.4 MB | Adobe PDF | Visualizza/apri |
Page view(s)
70
controllato il 19-apr-2024
Download(s)
13
controllato il 19-apr-2024
Google ScholarTM
Check
Altmetric
Altmetric
Tutti i documenti in DSpace sono pubblicati ad Accesso Aperto, salvo diversa indicazione per alcuni documenti specifici.