The lithium abundances for a large sample of red giants

Abstract

The lithium abundances for 378 G/K giants are derived with non-LTE correction considered. Among these, there are 23 stars that host planetary systems. The lithium abundance is investigated, as a function of metallicity, effective temperature, and rotational velocity, as well as the impact of a giant planet on G/K giants. The results show that the lithium abundance is a function of metallicity and effective temperature. The lithium abundance has no correlation with rotational velocity at vsini $<$ 10 km s${}^{-1}$. Giants with planets present lower lithium abundance and slow rotational velocity (vsini $<$ 4 km s${}^{-1}$). Our sample includes three Li-rich G/K giants, 36 Li-normal stars and 339 Li-depleted stars. The fraction of Li-rich stars in this sample agrees with the general rate of less than 1$\%$ in literature, and the stars that show normal amounts of Li are supposed to possess the same abundance at the current interstellar medium. For the Li-depleted giants, Li deficiency may have already taken place at the main sequence stage for many intermediate-mass (1.5-5 M${}_{\odot }$) G/K giants. Finally, we present the lithium abundance and kinematic parameters for an enlarged sample of 565 giants using a compilation of literature, and confirm that the lithium abundance is a function of metallicity and effective temperature. With the enlarged sample, we investigate the differences between the lithium abundance in thin-/thick-disk giants, which indicate that the lithium abundance in thick-disk giants is more depleted than that in thin-disk giants.

References in corpus (22)

• Local stellar kinematics from Hipparcos data
• Elemental Abundance Survey of The Galactic Thick Disk
• alpha-, r-, and s-process element trends in the Galactic thin and thick disks
• Departures from LTE for neutral Li in late-type stars
• The Y^2 Stellar Evolutionary Tracks
• The accretion of planets and brown dwarfs by giant stars -- II. solar mass stars on the red giant branch
• Lithium abundances in nearby FGK dwarf and subgiant stars: internal destruction, Galactic chemical evolution, and exoplanets
• Stellar Parameters and Elemental Abundances of Late-G Giants
• Enhanced lithium depletion in Sun-like stars with orbiting planets
• Lithium depletion in solar-like stars: no planet connection
• Lithium in stars with exoplanets
• Origin of lithium enrichment in K giants
• Metal-Poor Lithium-Rich Giants in the Radial Velocity Experiment Survey
• A Substellar Companion to the Intermediate-Mass Giant 11 Com
• A Comparative Study on Lithium Abundances in Solar--Type Stars With and Without Planets
• Behavior of Li abundances in solar-analog stars II. Evidence of the connection with rotation and stellar activity
• BD+48 740 - Li overabundant giant star with a planet. A case of recent engulfment?
• Lithium Abundances in a Sample of Planet Hosting Dwarfs
• Li-rich RGB stars in the Galactic Bulge
• Observational constraints for Lithium depletion before the RGB
• Stellar Parameters and Chemical Abundances of G Giants
• Lithium, Sodium, and Potassium Abundances in Sharp-Lined A-Type Stars

Cited by in corpus (43)

• VLT/FLAMES high-resolution chemical abundances in Sculptor: a textbook dwarf spheroidal galaxy
• The AMBRE Project: Constraining the lithium evolution in the Milky Way
• Abundances in the Local Region I: G and K Giants
• Lithium-rich Giants in LAMOST Survey. I. The Catalog
• Lithium in red giant stars: Constraining non-standard mixing with large surveys in the Gaia era
• A Catalog of Stellar Unified Properties (CATSUP) for 951 FGK-Stars Within 30 pc
• On Infrared Excesses Associated With Li-Rich K Giants
• Seismic probing of the first dredge-up event through the eccentric red-giant & red-giant spectroscopic binary KIC9163796
• TAPAS - Tracking Advanced Planetary Systems with HARPS-N. II. Super Li-rich giant HD 107028
• KIC 9821622: An interesting lithium-rich giant in the Kepler field
• Far-infrared study of K giants in the solar neighborhood: Connection between Li enrichment and mass-loss
• The WAGGS project - II. The reliability of the calcium triplet as a metallicity indicator in integrated stellar light
• Lithium in stellar atmospheres: observations and theory
• A close-in giant planet escapes engulfment by its star
• Spectroscopic study of two new super Li rich red clump K giants
• On the observational characteristics of lithium-enhanced giant stars in comparison with normal red giants
• HD-TESS: An Asteroseismic Catalog of Bright Red Giants within TESS Continuous Viewing Zones
• A Pair of Giant Planets around the Evolved Intermediate-Mass Star HD 47366: Multiple Circular Orbits or a Mutually Retrograde Configuration
• High-resolution spectroscopic monitoring observations of FU Orionis-type object, V960 Mon
• Chemical Composition of Bright Stars in the Continuous Viewing Zone of the TESS Space Mission
• Evidence of extra-mixing in field giants as traced by lithium and carbon isotope ratio
• Transiting exoplanets from the CoRoT space mission XXVII. CoRoT-28b, a planet orbiting an evolved star, and CoRoT-29b, a planet showing an asymmetric transit
• Photometric and spectroscopic study of the EXor-like eruptive young star Gaia19fct
• Li-rich K giants, dust excess, and binarity
• The peculiar chemical pattern of the WASP-160 binary system: signatures of planetary formation and evolution?
• Regular Radial Velocity Variations in Nine G- and K-type Giant Stars: Eight Planets and One Planet Candidate
• Theoretical analysis of surface brightness-colour relations for late-type stars using MARCS model atmospheres
• Li-rich and super Li-rich giants produced by element diffusion
• Line-depth ratios as indicators of effective temperature and surface gravity
• Disentangling the origin of chemical differences using GHOST
• The effect of surface gravity on line-depth ratios in the wavelength range 0.97-1.32 μm
• Li-rich Giants Identified from LAMOST DR8 Low-Resolution Survey
• The enigma of Li-rich giants and its relation with temporal variations observed in radial velocity and stellar activity signals
• On Lithium-6 as diagnostic of the lithium-enrichment mechanism in red giants
• Spectroscopic Study on the Beryllium Abundances of Red Giant Stars
• Correlating Intrinsic Stellar Parameters with Mg II Self-Reversal Depths
• Discovery of a Metal-Poor Red Giant Star with the Highest Ultra-Lithium Enhancement
• The Cool Giant HD 77361 - A Super Li-Rich Star
• A Search for Candidate Li-Rich Giant Stars in SDSS DR10
• Vintage NPOI: New and Updated Angular Diameters for 145 Stars
• Precise radial velocities of giant stars -- XVII. Distinguishing planets from intrinsically induced radial velocity signals in evolved stars
• Concerning Li-rich status of KIC~9821622: A Kepler field RGB star reported as Li-rich Giant
• Overabundance of s-process elements in the atmosphere of the active red giant