Cold Jupiters and improved masses in 38 Kepler and K2 small planet systems from 3661 HARPS-N radial velocities. No excess of cold Jupiters in small planet systems
In: A&A 677, A33 (2023); (2023)
Online
report
The exoplanet population characterized by relatively short orbital periods ($P<100$ d) around solar-type stars is dominated by super-Earths and sub-Neptunes. However, these planets are missing in our Solar System and the reason behind this absence is still unknown. Two theoretical scenarios invoke the role of Jupiter as the possible culprit: Jupiter may have acted as a dynamical barrier to the inward migration of sub-Neptunes from beyond the water iceline; alternatively, Jupiter may have reduced considerably the inward flux of material (pebbles) required to form super-Earths inside that iceline. Both scenarios predict an anti-correlation between the presence of small planets (SPs) and that of cold Jupiters (CJs) in exoplanetary systems. To test that prediction, we homogeneously analyzed the radial-velocity (RV) measurements of 38 Kepler and K2 transiting SP systems gathered over almost 10 years with the HARPS-N spectrograph, as well as publicly available RVs collected with other facilities. We detected five CJs in three systems, two in Kepler-68, two in Kepler-454, and a very eccentric one in K2-312. We derived an occurrence rate of $9.3^{+7.7}_{-2.9}\%$ for CJs with $0.3-13~M_{Jup}$ and 1-10 AU, which is lower but still compatible at $1.3\sigma$ with that measured from RV surveys for solar-type stars, regardless of the presence or absence of SPs. The sample is not large enough to draw a firm conclusion about the predicted anti-correlation between SPs and CJs; nevertheless, we found no evidence of previous claims of an excess of CJs in SP systems. As an important by-product of our analyses, we homogeneously determined the masses of 64 Kepler and K2 small planets, reaching a precision better than 5, 7.5 and 10$\sigma$ for 25, 13 and 8 planets, respectively. Finally, we release the 3661 HARPS-N radial velocities used in this work to the scientific community. [Abridged]
Comment: 21 pages, 10 figures, 10 tables, published in Astronomy and Astrophysics. The updated version of the article takes into account the A&A language editing and guidelines. Tables 1, A.1 and full Table 2 are available at the CDS via anonymous ftp to cdsarc.cds.unistra.fr (130.79.128.5) or via https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/677/A33
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Cold Jupiters and improved masses in 38 Kepler and K2 small planet systems from 3661 HARPS-N radial velocities. No excess of cold Jupiters in small planet systems
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Autor/in / Beteiligte Person: | Bonomo, A. S. ; Dumusque, X. ; Massa, A. ; Mortier, A. ; Bongiolatti, R. ; Malavolta, L. ; Sozzetti, A. ; Buchhave, L. A. ; Damasso, M. ; Haywood, R. D. ; Morbidelli, A. ; Latham, D. W. ; Molinari, E. ; Pepe, F. ; Poretti, E. ; Udry, S. ; Affer, L. ; Boschin, W. ; Charbonneau, D. ; Cosentino, R. ; Cretignier, M. ; Ghedina, A. ; Lega, E. ; López-Morales, M. ; Margini, M. ; Fiorenzano, A. F. Martínez ; Mayor, M. ; Micela, G. ; Pedani, M. ; Pinamonti, M. ; Rice, K. ; Sasselov, D. ; Tronsgaard, R. ; Vanderburg, A. |
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Quelle: | A&A 677, A33 (2023); (2023) |
Veröffentlichung: | 2023 |
Medientyp: | report |
DOI: | 10.1051/0004-6361/202346211 |
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