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…
Figures and Tables from this paper
One Citation
Distribution and Evolution of the Li Abundance in Red Clump Stars Can Be Explained by Internal Gravity Waves
- Physics, Environmental ScienceThe Astrophysical Journal
- 2023
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