Blue straggler stars in old open clusters exhibit a Kraft break in rotation, with rapid rotators above the break and slow rotators below, indicating their envelopes behave like those of single stars.
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Blue straggler stars in old open clusters predominantly appear near the terminal-age main sequence because mass transfer from asymptotic giant branch donors enriches their cores with helium.
Old Sun-like stars in M67 show no near-ultraviolet flares above twice their normal brightness and no confirmed variability above 30 percent over the five-year GALEX monitoring.
Ingestion of a 5.2-Earth-mass rocky planet on a grazing orbit can explain the 0.128 dex metal enhancement of turn-off star M67 Y2235.
Stellar spin axes in NGC 2516 are consistent with an isotropic distribution, with moderate alignment not excluded.
A new calibrated catalog of 1.6 million radial velocities from LAMOST medium-resolution spectra, with precision from 0.91 to 1.36 km/s depending on signal-to-noise.
citing papers explorer
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Blue Straggler Stars in Old Open Clusters and the Kraft Break
Blue straggler stars in old open clusters exhibit a Kraft break in rotation, with rapid rotators above the break and slow rotators below, indicating their envelopes behave like those of single stars.
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The Distribution of Blue Straggler Stars in the Color-Magnitude Diagrams of Old Open Clusters
Blue straggler stars in old open clusters predominantly appear near the terminal-age main sequence because mass transfer from asymptotic giant branch donors enriches their cores with helium.