The GAPS Programme with HARPS-N@TNG XIV. Investigating giant planet migration history via improved eccentricity and mass determination for 231 transiting planets
| Title: | The GAPS Programme with HARPS-N@TNG XIV. Investigating giant planet migration history via improved eccentricity and mass determination for 231 transiting planets |
|---|---|
| Authors: | Bonomo, A. S., Desidera, S., Benatti, S., Borsa, F., Crespi, S., Damasso, M., Lanza, A. F., Sozzetti, A., Lodato, G., Marzari, F., Boccato, C., Claudi, R. U., Cosentino, R., Covino, E., Gratton, R., Maggio, A., Micela, G., Molinari, E., Pagano, I., Piotto, G., Poretti, E., Smareglia, R., Affer, L., Biazzo, K., Bignamini, A., Esposito, M., Giacobbe, P., Hébrard, G., Malavolta, L., Maldonado, J., Mancini, L., Fiorenzano, A. Martinez, Masiero, S., Nascimbeni, V., Pedani, M., Rainer, M., Scandariato, G. |
| Source: | A&A 602, A107 (2017) |
| Publication Year: | 2017 |
| Collection: | Astrophysics |
| Subject Terms: | Astrophysics - Earth and Planetary Astrophysics, Astrophysics - Solar and Stellar Astrophysics |
| More Details: | We carried out a Bayesian homogeneous determination of the orbital parameters of 231 transiting giant planets (TGPs) that are alone or have distant companions; we employed DE-MCMC methods to analyse radial-velocity (RV) data from the literature and 782 new high-accuracy RVs obtained with the HARPS-N spectrograph for 45 systems over 3 years. Our work yields the largest sample of systems with a transiting giant exoplanet and coherently determined orbital, planetary, and stellar parameters. We found that the orbital parameters of TGPs in non-compact planetary systems are clearly shaped by tides raised by their host stars. Indeed, the most eccentric planets have relatively large orbital separations and/or high mass ratios, as expected from the equilibrium tide theory. This feature would be the outcome of high-eccentricity migration (HEM). The distribution of $\alpha=a/a_R$, where $a$ and $a_R$ are the semi-major axis and the Roche limit, for well-determined circular orbits peaks at 2.5; this also agrees with expectations from the HEM. The few planets of our sample with circular orbits and $\alpha >5$ values may have migrated through disc-planet interactions instead of HEM. By comparing circularisation times with stellar ages, we found that hot Jupiters with $a < 0.05$ au have modified tidal quality factors $10^{5} < Q'_p < 10^{9}$, and that stellar $Q'_s > 10^{6}-10^{7}$ are required to explain the presence of eccentric planets at the same orbital distance. As a by-product of our analysis, we detected a non-zero eccentricity for HAT-P-29; we determined that five planets that were previously regarded to have hints of non-zero eccentricity have circular orbits or undetermined eccentricities; we unveiled curvatures caused by distant companions in the RV time series of HAT-P-2, HAT-P-22, and HAT-P-29; and we revised the planetary parameters of CoRoT-1b. Comment: 44 pages (16 pages of main text and figures), 11 figures, 5 longtables, published in Astronomy and Astrophysics, Volume 602, A107 (2017). Tables with new HARPS-N and TRES radial-velocity data (Tables 1 and 2), stellar parameters (Table 7), orbital parameters and RV jitter (Table 8), and planet physical parameters (Table 9) are available as ancillary files (sidebar on the right) |
| Document Type: | Working Paper |
| DOI: | 10.1051/0004-6361/201629882 |
| Access URL: | http://arxiv.org/abs/1704.00373 |
| Accession Number: | edsarx.1704.00373 |
| Database: | arXiv |
| FullText | Text: Availability: 0 CustomLinks: – Url: http://arxiv.org/abs/1704.00373 Name: EDS - Arxiv Category: fullText Text: View this record from Arxiv MouseOverText: View this record from Arxiv – Url: https://resolver.ebsco.com/c/xy5jbn/result?sid=EBSCO:edsarx&genre=article&issn=&ISBN=&volume=&issue=&date=20170402&spage=&pages=&title=The GAPS Programme with HARPS-N@TNG XIV. Investigating giant planet migration history via improved eccentricity and mass determination for 231 transiting planets&atitle=The%20GAPS%20Programme%20with%20HARPS-N%40TNG%20XIV.%20Investigating%20giant%20planet%20migration%20history%20via%20improved%20eccentricity%20and%20mass%20determination%20for%20231%20transiting%20planets&aulast=Bonomo%2C%20A.%20S.&id=DOI:10.1051/0004-6361/201629882 Name: Full Text Finder (for New FTF UI) (s8985755) Category: fullText Text: Find It @ SCU Libraries MouseOverText: Find It @ SCU Libraries |
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F.</searchLink><br /><searchLink fieldCode="AR" term="%22Sozzetti%2C+A%2E%22">Sozzetti, A.</searchLink><br /><searchLink fieldCode="AR" term="%22Lodato%2C+G%2E%22">Lodato, G.</searchLink><br /><searchLink fieldCode="AR" term="%22Marzari%2C+F%2E%22">Marzari, F.</searchLink><br /><searchLink fieldCode="AR" term="%22Boccato%2C+C%2E%22">Boccato, C.</searchLink><br /><searchLink fieldCode="AR" term="%22Claudi%2C+R%2E+U%2E%22">Claudi, R. 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Martinez</searchLink><br /><searchLink fieldCode="AR" term="%22Masiero%2C+S%2E%22">Masiero, S.</searchLink><br /><searchLink fieldCode="AR" term="%22Nascimbeni%2C+V%2E%22">Nascimbeni, V.</searchLink><br /><searchLink fieldCode="AR" term="%22Pedani%2C+M%2E%22">Pedani, M.</searchLink><br /><searchLink fieldCode="AR" term="%22Rainer%2C+M%2E%22">Rainer, M.</searchLink><br /><searchLink fieldCode="AR" term="%22Scandariato%2C+G%2E%22">Scandariato, G.</searchLink> – Name: TitleSource Label: Source Group: Src Data: A&A 602, A107 (2017) – Name: DatePubCY Label: Publication Year Group: Date Data: 2017 – Name: Subset Label: Collection Group: HoldingsInfo Data: Astrophysics – Name: Subject Label: Subject Terms Group: Su Data: <searchLink fieldCode="DE" term="%22Astrophysics+-+Earth+and+Planetary+Astrophysics%22">Astrophysics - Earth and Planetary Astrophysics</searchLink><br /><searchLink fieldCode="DE" term="%22Astrophysics+-+Solar+and+Stellar+Astrophysics%22">Astrophysics - Solar and Stellar Astrophysics</searchLink> – Name: Abstract Label: Description Group: Ab Data: We carried out a Bayesian homogeneous determination of the orbital parameters of 231 transiting giant planets (TGPs) that are alone or have distant companions; we employed DE-MCMC methods to analyse radial-velocity (RV) data from the literature and 782 new high-accuracy RVs obtained with the HARPS-N spectrograph for 45 systems over 3 years. Our work yields the largest sample of systems with a transiting giant exoplanet and coherently determined orbital, planetary, and stellar parameters. We found that the orbital parameters of TGPs in non-compact planetary systems are clearly shaped by tides raised by their host stars. Indeed, the most eccentric planets have relatively large orbital separations and/or high mass ratios, as expected from the equilibrium tide theory. This feature would be the outcome of high-eccentricity migration (HEM). The distribution of $\alpha=a/a_R$, where $a$ and $a_R$ are the semi-major axis and the Roche limit, for well-determined circular orbits peaks at 2.5; this also agrees with expectations from the HEM. The few planets of our sample with circular orbits and $\alpha >5$ values may have migrated through disc-planet interactions instead of HEM. By comparing circularisation times with stellar ages, we found that hot Jupiters with $a < 0.05$ au have modified tidal quality factors $10^{5} < Q'_p < 10^{9}$, and that stellar $Q'_s > 10^{6}-10^{7}$ are required to explain the presence of eccentric planets at the same orbital distance. As a by-product of our analysis, we detected a non-zero eccentricity for HAT-P-29; we determined that five planets that were previously regarded to have hints of non-zero eccentricity have circular orbits or undetermined eccentricities; we unveiled curvatures caused by distant companions in the RV time series of HAT-P-2, HAT-P-22, and HAT-P-29; and we revised the planetary parameters of CoRoT-1b.<br />Comment: 44 pages (16 pages of main text and figures), 11 figures, 5 longtables, published in Astronomy and Astrophysics, Volume 602, A107 (2017). Tables with new HARPS-N and TRES radial-velocity data (Tables 1 and 2), stellar parameters (Table 7), orbital parameters and RV jitter (Table 8), and planet physical parameters (Table 9) are available as ancillary files (sidebar on the right) – Name: TypeDocument Label: Document Type Group: TypDoc Data: Working Paper – Name: DOI Label: DOI Group: ID Data: 10.1051/0004-6361/201629882 – Name: URL Label: Access URL Group: URL Data: <link linkTarget="URL" linkTerm="http://arxiv.org/abs/1704.00373" linkWindow="_blank">http://arxiv.org/abs/1704.00373</link> – Name: AN Label: Accession Number Group: ID Data: edsarx.1704.00373 |
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