WIYN open cluster study: The old open cluster, NGC 188, and a re-evaluation of Lithium-richness among red giants

@article{Sun2022WIYNOC,
  title={WIYN open cluster study: The old open cluster, NGC 188, and a re-evaluation of Lithium-richness among red giants},
  author={Qinghui Sun and Constantine P. Deliyannis and Bruce A. Twarog and Barbara J. Anthony-Twarog and Jeffrey D. Cummings and Aaron Steinhauer},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2022}
}
We present WIYN★/Hydra spectra of 34 red giant candidate members of NGC 188, which, together with WOCS† and Gaia data yield 23 single members, 6 binary members, 4 single nonmembers, and 1 binary nonmember. We report [Fe/H] for 29 members and derive [Fe/H]NGC188 = +0.064 ± 0.018 dex (σμ) (sky spectra yield A(Fe)⊙ = 7.520 ± 0.015 dex (σμ)). We discuss effects on the derived parameters of varying Yale-Yonsei isochrones to fit the turnoff. We take advantage of the coolest, lowest-gravity giants… 

Distribution and Evolution of the Li Abundance in Red Clump Stars Can Be Explained by Internal Gravity Waves

The study of Li phenomena in red clump (RC) stars can give us a deeper understanding of the structure and evolution of stars. Chanamé et al. explained the RC Li abundance distributions naturally

References

SHOWING 1-2 OF 2 REFERENCES

The Internal Solar Angular Velocity (The Solar-Stellar Connection: Internal

  • Astrophysics and Space Science Library
  • 1987

2022, in preparation

  • Denissenkov, P. A
  • 1997