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Thirty Metal-Poor Stars Became Precision Benchmarks
Fifteen eclipsing binaries yielded masses and radii with median uncertainties below one percent.
Summary
Fifteen eclipsing binaries yielded masses and radii with median uncertainties below one percent.
Combined light curves, radial velocities and disentangled spectra found three systems below one-hundredth solar metallicity. The most metal-poor reached [M/H] = -2.51, while three age estimates exceeded ten billion years; model-dependent ages typically carried uncertainties under half a billion years.
Why it matters
Fifteen eclipsing binaries yielded masses and radii with median uncertainties below one percent.
Limits and context
No additional limitation was separately recorded.
Key claims
Fifteen eclipsing binaries yielded masses and radii with median uncertainties below one percent.
Evidence: source-2026-09-20-019
Sources
- arXiv preprint 2609.19248arXiv · primary research
Corrections
No corrections have been recorded for this story.