244 citations · 826 across the 8 of their papers we have counts for
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Evolved Eclipsing Binaries and the Age of the Open Cluster NGC 752
Eric L. Sandquist, Andrew J. Buckner, Matthew D. Shetrone +8
We present analyses of improved photometric and spectroscopic observations for two detached eclipsing binaries at the turnoff of the open cluster NGC 752: the 1.01 day binary DS An…
Li in Open Clusters: Cool Dwarfs in the Young, Subsolar Metallicity Cluster M35 (NGC 2168)
B. J. Anthony-Twarog, C. P. Deliyannis, D. Harmer +4
Hydra spectra of 85 G-K dwarfs in the young cluster, M35, near the Li 6708 Angstrom line region are analyzed. From velocities and Gaia astrometry, 78 are likely single-star members…
Hubble Space Telescope Trigonometric Parallax of Polaris B, Companion of the Nearest Cepheid
Howard E. Bond, Edmund P. Nelan, Nancy Remage Evans +2
Polaris, the nearest and brightest Cepheid, is a potential anchor point for the Leavitt period-luminosity relation. However, its distance is a matter of contention, with recent adv…
Three Ancient Halo Subgiants: Precise Parallaxes, Compositions, Ages, and Implications for Globular Clusters
Don A. VandenBerg, Howard E. Bond, Edmund P. Nelan +3
The most accurate ages for the oldest stars are those obtained for nearby halo subgiants, because they depend almost entirely on just the measured parallaxes and absolute oxygen ab…
HD 140283: A Star in the Solar Neighborhood that Formed Shortly After the Big Bang
Howard E. Bond, Edmund P. Nelan, Don A. VandenBerg +2
HD 140283 is an extremely metal-deficient and high-velocity subgiant in the solar neighborhood, having a location in the HR diagram where absolute magnitude is most sensitive to st…