#metal-poor stars

topicmetal-poor stars

2 papers · 1 filter

astro-ph.SR2026

Long-term high-resolution spectroscopic monitoring of the evolved metal-poor binary PS Gem

V. G. Klochkova, V. E. Panchuk, J. K. Zhao +3

The paper reports three decades of high‑resolution spectroscopic observations of the metal‑poor binary star PS Gem, analyzing Hα line variations and radial velocities to characteri…

astro-ph.SR2026

The Carbon-Dependent Binary Frequency of CEMP-no Stars

John D. Dixon, Terese T. Hansen, Jennifer Marshall +15

The authors monitored radial velocities of 30 CEMP-no stars and combined these data with literature to assess binary frequencies, finding that high‑carbon CEMP-no stars have a sign…