Ariel stellar characterisation III. Fast rotators and new FGK stars in the Ariel Mission Candidate Sample
arXiv:2502.20950 · doi:10.1051/0004-6361/202453059
Abstract
The next mission dedicated to the study of planetary atmospheres is the Ariel space mission, planned for launch in 2029, which will observe a variety of planetary systems belonging to different classes around stars with spectral types from M to A. To optimise the scientific outcome of the mission, such stars need to be homogeneously characterised beforehand. In this work, we focus on a methodology based on spectral synthesis for the characterisation of FGK-type stars from the Ariel Tier 1 Mission Candidate Sample (MCS) which exhibit fast rotation. In addition, we analyse slow-rotating FGK-type stars, with either new observations or archival spectra available, consistently as in our previous work using the equivalent width (EW) analysis. To ensure consistency between our methods, we re-analysed a sample of FGK-type stars with the spectral synthesis method and compared it to our previous work. The results of our analysis show excellent agreement with the previous set of derived parameters. We also computed their orbital parameters establishing whether they belong to the Galactic thin or thick discs. With the current set of stellar parameters, we almost double the analysed hosts in the Ariel MCS to 353 stars in total. Using our homogeneous set of stellar parameters, we studied the correlations between stellar and planetary properties for the Ariel MCS analysed so far. We confirmed a close relationship between stellar mass (up to 1.8 solar masses) and giant planet radius, with more inflated planets at lower metallicity. We confirm that giant planets are more frequent around more metal-rich stars that belong to the thin disc, while lower-mass planets are also found in more metal-poor environments, and are more frequent than giant planets in the thick disc as also seen in other works in the literature.
20 pages, accepted for publication at A&A
References in corpus (51)
- SciPy 1.0--Fundamental Algorithms for Scientific Computing in Python
- Array Programming with NumPy
- The Astropy Project: Sustaining and Growing a Community-oriented Open-source Project and the Latest Major Release (v5.0) of the Core Package
- Gaia Data Release 3: Summary of the content and survey properties
- A grid of MARCS model atmospheres for late-type stars I. Methods and general properties
- galpy: A Python Library for Galactic Dynamics
- alpha-, r-, and s-process element trends in the Galactic thin and thick disks
- Determining stellar atmospheric parameters and chemical abundances of FGK stars with iSpec
- The Milky Way's circular velocity curve between 4 and 14 kpc from APOGEE data
- A stellar-mass-dependent drop in planet occurrence rates
- Kepler constraints on planets near hot Jupiters
- Determining stellar macroturbulence using asteroseismic rotational velocities from Kepler
- The New Generation Planetary Population Synthesis (NGPPS). IV. Planetary systems around low-mass stars
- The Gaia-ESO Public Spectroscopic Survey: Implementation, data products, open cluster survey, science, and legacy
- Atomic data for the Gaia-ESO Survey
- AMD-stability and the classification of planetary systems
- The New Generation Planetary Population Synthesis (NGPPS). II. Planetary population of solar-like stars and overview of statistical results
- The Gaia-ESO Public Spectroscopic Survey: Motivation, implementation, GIRAFFE data processing, analysis, and final data products
- Exploring the alpha-enhancement of metal-poor planet-hosting stars. The Kepler and HARPS samples
- SWEET-Cat 2.0: The Cat just got SWEETer; Higher quality spectra and precise parallaxes from GAIA eDR3
- The New Generation Planetary Population Synthesis (NGPPS). III. Warm super-Earths and cold Jupiters: A weak occurrence correlation, but with a strong architecture-composition link
- Heavy metal rules. I. Exoplanet incidence and metallicity
- Occurrence and Architecture of Kepler Planetary Systems as Functions of Stellar Mass and Effective Temperature
- The origin of the high metallicity of close-in giant exoplanets: Combined effect of the resonant and aerodynamic shepherding
- Assessment of [Fe/H] determinations for FGK stars in spectroscopic surveys
- The Gaia-ESO Survey: Membership probabilities for stars in 63 open and 7 globular clusters from 3D kinematics
- The GAPS Programme with HARPS-N at TNG. XXXV. Fundamental properties of transiting exoplanet host stars
- SteParSyn: A Bayesian code to infer stellar atmospheric parameters using spectral synthesis
- Characterizing epochs of star formation across the Milky Way disc using age-metallicity distributions of GALAH stars
- The Ariel Target List: The Impact of TESS and the Potential for Characterising Multiple Planets Within a System
- Investigating the Planet-Metallicity Correlation for Hot Jupiters
- Spectroscopic parameters for solar-type stars with moderate/high rotation. New parameters for 10 planet-hosts
- Normalized angular momentum deficit: A tool for comparing the violence of the dynamical histories of planetary systems
- The intrinsic multiplicity distribution of exoplanets revealed from the radial velocity method
- Exoplanets in the Galactic context: Planet occurrence rates in the thin disk, thick disk and stellar halo of Kepler stars
- Exploring the link between star and planet formation with Ariel
- Anti-correlation between multiplicity and orbital properties in exoplanetary systems as a possible record of their dynamical histories
- Atomic diffusion and turbulent mixing in solar-like stars: Impact on the fundamental properties of FG-type stars
- Monitoring the young planet host V1298 Tau with SPIRou: planetary system and evolving large-scale magnetic field
- Ariel stellar characterisation: I -- homogeneous stellar parameters of 187 FGK planet host stars Description and validation of the method
- Atmospheric stellar parameters for large surveys using FASMA, a new spectral synthesis package
- Planet formation throughout the Milky Way: Planet populations in the context of Galactic chemical evolution
- Galactic chemical evolution of exoplanet host stars: Are high-mass planetary systems young?
- The homogeneous characterisation of Ariel host stars
- On the iron ionization balance of cool stars
- The GAPS program at TNG XLVII: The unusual formation history of V1298 Tau
- Chaos in multiplanetary extrasolar systems
- Why do more massive stars host larger planets?
- Ariel stellar characterisation II. Chemical abundances of carbon, nitrogen, and oxygen for 181 planet-host FGK dwarf stars
- Populating The Milky Way: Characterising Planet Demographics by Combining Galaxy Formation Simulations and Planet Population Synthesis Models
- Determination of stellar parameters for Ariel targets: a comparison analysis between different spectroscopic methods