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J/A+A/603/A30  Evidence for two distinct giant planet population (Santos+, 2017)

Observational evidence for two distinct giant planet populations. Santos N.C., Adibekyan V., Figueira P., Andreasen D.T., Barros S.C.C., Delgado-Mena E., Demangeon O., Faria J.P., Oshagh M., Sousa S.G., Viana P.T.P., Ferreira A.C.S. <Astron. Astrophys. 603, A30 (2017)> =2017A&A...603A..30S (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Stars, giant ; Planets ; Stars, masses Keywords: planets and satellites: formation - planetary systems - techniques: spectroscopic - stars: abundances - methods: statistical Abstract: Analysis of the statistical properties of exoplanets, together with those of their host stars, are providing a unique view into the process of planet formation and evolution. In this paper we explore the properties of the mass distribution of giant planet companions to solar-type stars, in a quest for clues about their formation process. With this goal in mind we studied, with the help of standard statistical tests, the mass distribution of giant planets using data from the catalog and the SWEET-Cat database of stellar parameters for stars with planets. We show that the mass distribution of giant planet companions is likely to present more than one population with a change in regime around 4M{Jup}. Above this value host stars tend to be more metal poor and more massive and have [Fe/H] distributions that are statistically similar to those observed in field stars of similar mass. On the other hand, stars that host planets below this limit show the well-known metallicity-giant planet frequency correlation. We discuss these results in light of various planet formation models and explore the implications they may have on our understanding of the formation of giant planets. In particular, we discuss the possibility that the existence of two separate populations of giant planets indicates that two different processes of formation are at play. Description: Table contains the list of stellar and planet properties used in the selection and analysis presented in the paper. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table.dat 104 3360 Sample overview
See also: V/133 : Kepler Input Catalog (Kepler Mission Team, 2009) Byte-by-byte Description of file: table.dat
Bytes Format Units Label Explanations
1- 15 A15 --- Star Star name 17- 23 F7.4 --- Vmag ?=- V magnitude 25- 31 F7.1 K Teff ?=- Effective temperature 33- 36 F4.2 [cm/s2] logg ?=- Stellar surface gravity 38- 50 F13.8 AU smaj ?=- Semi-major axis 52- 56 F5.2 [-] [Fe/H] Metallicity 58- 61 F4.2 MSun Mass* ?=- Stellar mass 63- 78 E16.13 MJup MassPl ?=- Planet mass 80- 96 F17.11 d Per ?=- Planet orbital period 98-104 F7.5 --- e ?=- Planet orbital eccentricity
Acknowledgements: Nuno Santos, Nuno.Santos(at)
(End) Nuno Santos [IA & U. Porto, Portugal], Patricia Vannier [CDS] 17-May-2017
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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