Chemical composition of stars with massive planets

Abstract

Stellar parameters of 25 planet-hosting stars and abundances of Li, C, O, Na, Mg, Al, S, Si, Ca, Sc, Ti, V, Cr, Mn, Fe, Ni, Zn, Y, Zr, Ba, Ce, Pr, Nd, Sm and Eu, were studied based on homogeneous high resolution spectra and uniform techniques. The iron abundance [Fe/H] and key elements (Li, C, O, Mg, Si) indicative of the planet formation, as well as the dependencies of [El/Fe] on $T_{cond}$, were analyzed. The iron abundances determined in our sample stars with detected massive planets range within -0.3<[Fe/H]<0.4. The behaviour of [C/Fe], [O/Fe], [Mg/Fe] and [Si/Fe] relative to [Fe/H] is consistent with the Galactic Chemical Evolution trends. The mean values of C/O and [C/O] are <C/O>= 0.48 +/-0.07 and <[C/O]>=-0.07 +/-0.07, which are slightly lower than solar ones. The Mg/Si ratios range from 0.83 to 0.95 for four stars in our sample and from 1.0 to 1.86 for the remaining 21 stars. Various slopes of [El/Fe] vs. Tcond were found. The dependencies of the planetary mass on metallicity, the lithium abundance, the C/O and Mg/Si ratios, and also on the [El/Fe]-Tcond slopes were considered.

arXiv comment25 pages, 11 figures, Accepted in MNRAS

References in corpus (80)

• The chemical composition of the Sun
• Galactic Chemical Evolution: Hydrogen Through Zinc
• The s Process: Nuclear Physics, Stellar Models, Observations
• Spectroscopic parameters for 451 stars in the HARPS GTO planet search program. Stellar [Fe/H] and the frequency of exo-Neptunes
• Chemical abundances of 1111 FGK stars from the HARPS GTO planet search program.Galactic stellar populations and planets
• The Interiors of Giant Planets: Models and Outstanding Questions
• The metal-rich nature of stars with planets
• The peculiar solar composition and its possible relation to planet formation
• Spectral Properties of Cool Stars: Extended Abundance Analysis of 1617 Planet Search Stars
• Chemical evolution with rotating massive star yields: I. The solar neighbourhood and the s-process elements
• Departures from LTE for neutral Li in late-type stars
• SWEET-Cat: A catalogue of parameters for Stars With ExoplanETs I. New atmospheric parameters and masses for 48 stars with planets
• The Compositional Diversity of Extrasolar Terrestrial Planets: I. In-Situ Simulations
• High-precision abundances of elements in solar twin stars: Trends with stellar age and elemental condensation temperature
• Near-UV Observations of HD221170: New Insights into the Nature of r-Process-Rich Stars
• Lithium abundances in nearby FGK dwarf and subgiant stars: internal destruction, Galactic chemical evolution, and exoplanets
• Enhanced lithium depletion in Sun-like stars with orbiting planets
• Chemical Clues on the Formation of Planetary Systems: C/O vs Mg/Si for HARPS GTO Sample
• On the correlation of elemental abundances with kinematics among galactic disk stars
• Parent Stars of Extrasolar Planets V: HD75289
• Lithium depletion in solar-like stars: no planet connection
• Experimental f-value and isotopic structure for the Ni I line blended with [OI] at 6300A
• Lithium in stars with exoplanets
• Li abundances in F stars: planets, rotation and galactic evolution
• NLTE determination of the aluminium abundance in a homogeneous sample of extremely metal-poor stars
• Stellar parameters and chemical abundances of 223 evolved stars with and without planets
• Carbon and oxygen abundances in stellar populations
• Elemental ratios in stars vs planets
• Li depletion in solar analogues with exoplanets: Extending the sample
• Searching for the signatures of terrestrial planets in F-, G-type main-sequence stars
• Exploring the alpha-enhancement of metal-poor planet-hosting stars. The Kepler and HARPS samples
• The Abundance Distribution in the Extrasolar-Planet Host Star HD19994
• On the Perils of Hyperfine Splitting: A reanalysis of Mn and Sc Abundance Trends
• Parent Stars of Extrasolar Planets. X. Lithium Abundances and vsini Revisited
• C/O Ratios of Stars with Transiting Hot Jupiter Exoplanets
• On the origin of stars with and without planets. Tc trends and clues to Galactic evolution
• High precision effective temperatures for 181 F--K dwarfs from line-depth ratios
• Correlation between lithium abundances and ages of solar twin stars
• Heavy metal rules. I. Exoplanet incidence and metallicity
• Carbon and Oxygen in Nearby Stars: Keys to Protoplanetary Disk Chemistry
• The solar photospheric abundance of carbon.Analysis of atomic carbon lines with the CO5BOLD solar model
• Gas composition of main volatile elements in protoplanetary discs and its implication for planet formation
• The SOPHIE search for northern extrasolar planets VIII. A warm Neptune orbiting HD164595
• Homogeneous abundance analysis of dwarf, subgiant and giant FGK stars with and without giant planets
• Grid of theoretical NLTE equivalent widths of four Ba II lines and barium abundance in cool stars
• Lithium abundance patterns of late-F stars: an in-depth analysis of the lithium desert
• The frequency of giant planets around metal-poor stars
• Planet signatures and effect of the chemical evolution of the Galactic thin-disk stars
• Abundance ratios of volatile vs. refractory elements in planet-harbouring stars: hints of pollution?
• Activity and the Li abundances in the FGK dwarfs
• The carbon-to-oxygen ratio in stars with planets
• Lithium depletion in solar-like stars: effect of overshooting based on realistic multi-dimensional simulations
• The Gaia-ESO Survey: A lithium-rotation connection at 5 Myr?
• From stellar to planetary composition: Galactic chemical evolution of Mg/Si mineralogical ratio
• Parent Stars of Extrasolar Planets. IX. Lithium Abundances
• The SOPHIE search for northern extrasolar planets. V. Follow-up of ELODIE candidates: Jupiter-analogs around Sun-like stars
• Planet accretion and the abundances of lithium isotopes
• Oxygen abundance distribution in Galactic disc
• C/O vs Mg/Si ratios in solar type stars: The HARPS sample
• Homogeneous spectroscopic parameters for bright planet host stars from the northern hemisphere
• CNO behaviour in planet-harbouring stars. II. Carbon abundances in stars with and without planets using the CH band
• Higher-precision radial velocity measurements with the SOPHIE spectrograph using octagonal-section fibers
• Mn abundances in the stars of the Galactic disc with metallicities -1.0 < [Fe/H] < 0.3
• Revisiting the 16 Cygni planet host at unprecedented precision and exploring automated tools for precise abundances
• The NLTE Barium Abundance in Dwarf Stars in the Metallicity Range of -1 < [Fe/H] < +0.3
• Extrasolar planets and brown dwarfs around AF-type stars. X.The SOPHIE northern sample. Combining the SOPHIE and HARPS surveys to compute the close giant planet mass-period distribution around AF-type stars
• Homogeneous photospheric parameters and C abundances in G and K nearby stars with and without planets
• Lithium abundance and rotation of seismic solar analogues - Solar and stellar connection from Kepler and Hermes observations
• The SOPHIE search for northern extrasolar planets. X. Detection and characterization of giant planets by the dozen
• Behaviour of elements from lithium to europium in stars with and without planets
• High-resolution Spectroscopic Study of Dwarf Stars in the Northern Sky: Lithium, Carbon, and Oxygen Abundances
• CNO behaviour in planet-harbouring stars. I Nitrogen abundances in stars with planets
• Exoplanet hosts reveal lithium depletion: Results from a homogeneous statistical analysis
• Observing the metal-poor solar neighbourhood: a comparison of galactic chemical evolution predictions
• The SOPHIE search for northern extrasolar planets. XI. Three new companions and an orbit update: Giant planets in the habitable zone
• The SOPHIE search for northern extrasolar planets: VI. Three new hot Jupiters in multi-planet extrasolar systems
• Masses, Oxygen and Carbon abundances in CHEPS dwarf stars
• An extreme planetary system around HD219828. One long-period super Jupiter to a hot-neptune host star
• The SOPHIE search for northern extrasolar planets - XII. Three giant planets suitable for astrometric mass determination with Gaia
• Mg/Si mineralogical ratio of low-mass planet hosts. Correction for the NLTE effects

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• The GAPS Programme with HARPS-N at TNG. XXXV. Fundamental properties of transiting exoplanet host stars
• Chemical Composition Of Bright Stars In The Northern Hemisphere: Star-Planet Connection
• Flux-Limited Diffusion Approximation Models of Giant Planet Formation by Disk Instability. II. Quadrupled Spatial Resolution
• Chemical composition of planetary hosts: C, N, and $\alpha$-element abundances
• Chemical Abundances Shape History (CASH). I. A Link between Giant Planets Orbital Periods and Host Stellar C/O Ratios