Li abundances for solar twins in the open cluster M67

Abstract

We determine lithium (Li) abundances for solar twins in the M67 open cluster to add valuable information about the correlation between Li depletion and stellar age and, then, better understand stellar structure and evolution. We use high resolution and good signal-to-noise ratio spectra to characterize Li depletion in three solar twins from M67, using spectral synthesis in the region of the asymmetric 6707.75 Å\, Li I feature. The mean Li abundance value of A(Li)$=1.6\pm 0.2$ dex for our sample of M67 solar twins (our three stars plus a fourth solar twin from a previous analysis in the literature) presents Li abundance expected for its age. Also, the scatter estimated from the standard deviation of the Li abundances in this work is similar to the typical scatter found in a sample of field solar twins presented in the literature.

6 pages, 3 figures. Accepted for publication at MNRAS

References in corpus (11)

• The Solar Twin Planet Search. I. Fundamental parameters of the stellar sample
• Stellar Chemical Abundances: In Pursuit of the Highest Achievable Precision
• 18 Sco: a solar twin rich in refractory and neutron-capture elements. Implications for chemical tagging
• Solar twins in M67
• Chemical Abundances of Main-Sequence, Turnoff, Subgiant and red giant Stars from APOGEE spectra II: Atomic Diffusion in M67 Stars
• The chemical compositions of solar twins in the open cluster M67
• A Measurement of Radius Inflation in the Pleiades and its Relation to Rotation and Lithium Depletion
• Chemical (in)homogeneity and atomic diffusion in the open cluster M67
• The Li-age correlation: the Sun is unusually Li deficient for its age
• Constraining the evolution of stellar rotation using solar twins
• A Revised Gyro-Age for M 67 from Kepler/K2-Campaign-5 Light Curves

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• The Gaia-ESO Survey: Empirical estimates of stellar ages from lithium equivalent widths (EAGLES)
• Lithium depletion and angular momentum transport in solar-type stars
• Lithium depletion in solar analogs: age and mass effects
• Survey for Distant Solar Twins (SDST) -- I. EPIC method for stellar parameter measurement
• Stellar Population Astrophysics (SPA) with the TNG. alpha-elements, lithium, sodium and aluminum in 16 open clusters
• Angular momentum and lithium transport from main sequence to sub-giant and red giant low-mass stars
• Testing a non-local 1-equation turbulent convection model: A solar model
• Using Lithium and Beryllium to Study Structure and Evolution of Rotating Stars