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 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 exoplanet.eu 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:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table.dat 104 3360 Sample overview
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See also:
V/133 : Kepler Input Catalog (Kepler Mission Team, 2009)
Byte-by-byte Description of file: table.dat
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Bytes Format Units Label Explanations
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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
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Acknowledgements:
Nuno Santos, Nuno.Santos(at) astro.up.pt
(End) Nuno Santos [IA & U. Porto, Portugal], Patricia Vannier [CDS] 17-May-2017