J/ApJ/808/187 Metallicities of KIC stars without planets (Buchhave+, 2015)
The metallicities of stars with and without transiting planets.
Buchhave L.A., Latham D.W.
<Astrophys. J., 808, 187 (2015)>
=2015ApJ...808..187B 2015ApJ...808..187B (SIMBAD/NED BibCode)
ADC_Keywords: Abundances ; Stars, dwarfs
Keywords: planetary systems; surveys; techniques: spectroscopic
Abstract:
Host star metallicities have been used to infer observational
constraints on planet formation throughout the history of the
exoplanet field. The giant planet metallicity correlation has now been
widely accepted, but questions remain as to whether the metallicity
correlation extends to the small terrestrial-sized planets. Here, we
report metallicities for a sample of 518 stars in the Kepler field
that have no detected transiting planets and compare their metallicity
distribution to a sample of stars that hosts small planets
(Rp<1.7R⊕). Importantly, both samples have been analyzed in a
homogeneous manner using the same set of tools (Stellar Parameters
Classification tool). We find the average metallicity of the sample of
stars without detected transiting planets to be
[m/H]SNTP,dwarf=-0.02±0.02dex and the sample of stars hosting
small planets to be [m/H]STP=-0.02±0.02dex. The average
metallicities of the two samples are indistinguishable within the
uncertainties, and the two-sample Kolmogorov-Smirnov test yields a
p-value of 0.68 (0.41σ), indicating a failure to reject the null
hypothesis that the two samples are drawn from the same parent
population. We conclude that the homogeneous analysis of the data
presented here supports the hypothesis that stars hosting small
planets have a metallicity similar to stars with no known transiting
planets in the same area of the sky.
Description:
The stars were observed with the Tillinghast Reflector Echelle
Spectrograph (TRES) on the 1.5m Tillinghast Reflector at the Fred
Lawrence Whipple Observatory on Mt. Hopkins, Arizona using the medium
resolution fiber (2.3" projected diameter) with a resolving power of
R∼44000, giving a wavelength coverage of ∼3800-9100Å. The spectra
used in this paper are available on the Kepler Community Follow-up
Observing Program website (http://cfop.ipac.caltech.edu/).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 19 539 Metallicities of stars with no detected
transiting planets
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See also:
V/133 : Kepler Input Catalog (Kepler Mission Team, 2009)
J/ApJS/210/1 : Asteroseismic study of solar-type stars (Chaplin+, 2014)
J/ApJ/771/107 : Spectroscopy of faint KOI stars (Everett+, 2013)
J/ApJ/767/95 : Improved parameters of smallest KIC stars (Dressing+, 2013)
J/A+A/551/A36 : Metallicity of M dwarfs. III. (Neves+, 2013)
J/A+A/549/A109 : HARPS XXXI. The M-dwarf sample (Bonfils+, 2013)
J/ApJ/757/161 : Spectroscopy of 56 exoplanet host stars (Torres+, 2012)
J/other/Nat/486.375 : Stellar parameters of KOI stars (Buchhave+, 2012)
J/AJ/142/112 : KIC photometric calibration (Brown+, 2011)
J/A+A/533/A141 : Stellar parameters for 582 HARPS FGK stars (Sousa+, 2011)
J/ApJ/622/1102 : The planet-metallicity correlation. (Fischer+, 2005)
J/A+A/415/1153 : [Fe/H] for 98 extra-solar planet-host stars (Santos+, 2004)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 8 I8 --- KIC [1430163/12735580] Kepler Input Catalog identifier
10- 14 F5.2 [-] [m/H] [-1.8/0.5] Metallicity
16- 19 F4.2 [-] e_[m/H] [0.08] Uncertainty in [m/H]
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 04-Dec-2015