Abundance analysis of benchmark M dwarfs

Abstract

Abundances of M dwarfs, being the most numerous stellar type in the Galaxy, can enhance our understanding of planet formation processes. They can also be used to study the chemical evolution of the Galaxy, where in particular alpha-capture elements play an important role. We aim to obtain abundances for Fe, Ti, and Ca for a small sample of well-known M dwarfs for which interferometric measurements are available. These stars and their abundances are intended to serve as a benchmark for future large-scale spectroscopic studies. We analysed spectra obtained with the GIANO-B spectrograph. Turbospectrum and the wrapper TSFitPy were used with MARCS atmospheric models in order to fit synthetic spectra to the observed spectra. We performed a differential abundance analysis in which we also analysed a solar spectrum with the same method and then subtracted the derived abundances line-by-line. The median was taken as the final abundance for each element and each star. Our abundances of Fe, Ti, and Ca agree mostly within uncertainties when comparing with other values from the literature. However, there are few studies to compare with.

12 pages, 6 figures, accepted for publication in A&A

References in corpus (50)

• Validation of the new Hipparcos reduction
• A grid of MARCS model atmospheres for late-type stars I. Methods and general properties
• The Apache Point Observatory Galactic Evolution Experiment (APOGEE)
• The PLATO 2.0 Mission
• Molecfit: A general tool for telluric absorption correction. I. Method and application to ESO instruments
• How to Constrain Your M Dwarf: measuring effective temperature, bolometric luminosity, mass, and radius
• Stellar Diameters and Temperatures II. Main Sequence K & M Stars
• Determining stellar atmospheric parameters and chemical abundances of FGK stars with iSpec
• The Solar Neighborhood XVII: Parallax Results from the CTIOPI 0.9m Program -- Twenty New Members of the RECONS 10 Parsec Sample
• APOGEE Data and Spectral Analysis from SDSS Data Release 16: Seven Years of Observations Including First Results from APOGEE-South
• Modern stellar spectroscopy caveats
• The CARMENES search for exoplanets around M dwarfs: High-resolution optical and near-infrared spectroscopy of 324 survey stars
• Observational constraints on the origin of the elements. IV: The standard composition of the Sun
• First Results from the CHARA Array. IV. The Interferometric Radii of Low-Mass Stars
• Stellar Diameters and Temperatures V. Eleven Newly Characterized Exoplanet Host Stars
• Elemental ratios in stars vs planets
• Astrophysical Parameters and Habitable Zone of the Exoplanet Hosting Star GJ 581
• Metallicity measurements using atomic lines in M and K dwarf stars
• An Earth-sized exoplanet with a Mercury-like composition
• The IAG solar flux atlas: Accurate wavelengths and absolute convective blueshift in standard solar spectra
• The CARMENES search for exoplanets around M dwarfs - Photospheric parameters of target stars from high-resolution spectroscopy
• The CARMENES search for exoplanets around M dwarfs -- Photospheric parameters of target stars from high-resolution spectroscopy. II. Simultaneous multiwavelength range modeling of activity insensitive lines
• Solar oxygen abundance
• SPIRou Input Catalogue: Global properties of 440 M dwarfs observed with ESPaDOnS at CFHT
• HADES RV Programme with HARPS-N at TNG XII. The abundance signature of M dwarf stars with planets
• Hyperfine Splitting in the VALD Database of Spectral-line Parameters
• Red Supergiant Stars as Cosmic Abundance Probes: NLTE Effects in J-band Iron and Titanium Lines
• Temperatures and Metallicities of M dwarfs in the APOGEE Survey
• A discontinuity in the $T_{\mathrm{eff}}$-radius relation of M-dwarfs
• Enhanced constraints on the interior composition and structure of terrestrial exoplanets
• Non-LTE Radiative Transfer with Turbospectrum
• Stellar Characterization of M-dwarfs from the APOGEE Survey: A Calibrator Sample for the M-dwarf Metallicities
• TOI-1452 b: SPIRou and TESS reveal a super-Earth in a temperate orbit transiting an M4 dwarf
• A planetary system with two transiting mini-Neptunes near the radius valley transition around the bright M dwarf TOI-776
• A detailed analysis of the Gl 486 planetary system
• Detailed Chemical Abundances for a Benchmark Sample of M Dwarfs from the APOGEE Survey
• Metallicity determination of M dwarfs - High-resolution IR spectroscopy
• Metallicity determination of M dwarfs - Expanded parameter range in metallicity and effective temperature
• The CARMENES search for exoplanets around M dwarfs -- A deep learning approach to determine fundamental parameters of target stars
• The red dwarf pair GJ65AB: inflated, spinning twins of Proxima
• Observational constraints on the origin of the elements. VII. NLTE analysis of Y II lines in spectra of cool stars and implications for Y as a Galactic chemical clock
• Elemental abundances of nearby M dwarfs based on high-resolution near-infrared spectra obtained by the Subaru/IRD survey: Proof of concept
• Determination of spectroscopic parameters for 313 M dwarf stars from their APOGEE Data Release 16 H-band spectra
• Optimal extraction of echelle spectra: getting the most from observations
• The CARMENES search for exoplanets around M dwarfs: Rubidium abundances in nearby cool stars
• The CARMENES search for exoplanets around M dwarfs: Not-so-fine hyperfine-split vanadium lines in cool star spectra
• Comparative high-resolution spectroscopy of M dwarfs -- exploring non-LTE effects
• Near infrared spectroscopy of M dwarfs. III. Carbon and oxygen abundances in late M dwarfs including the dusty rapid rotator 2MASSI J1835379+325954
• Cool and Data-Driven: An Exploration of Optical Cool Dwarf Chemistry with Both Data-Driven and Physical Models
• Performance of the Stellar Abundances and atmospheric Parameters Pipeline adapted for M dwarfs I. Atmospheric parameters from the spectroscopic module