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Gaia May See an Orbit Before It Can Measure One
A public DR4-like catalog injects more than 15 million null, one-companion and two-companion systems to stress-test astrometric orbit fitting.
Summary
A public DR4-like catalog injects more than 15 million null, one-companion and two-companion systems to stress-test astrometric orbit fitting.
The epochalypse catalog starts from 5,040,328 main-sequence stars within 500 parsecs and creates three matched scenarios for each. Injected companions span Mars to 80 Jupiter masses and 0.03 to 100 astronomical units without imposing an occurrence model or detectability cut. A demonstration with an astrometric periodogram finds that beyond the mission baseline, significant curvature can reveal a companion while leaving its period—and therefore mass—poorly constrained. This is a synthetic benchmark for future Gaia DR4 pipelines, not a count of detected planets.
Why it matters
A public DR4-like catalog injects more than 15 million null, one-companion and two-companion systems to stress-test astrometric orbit fitting.
Limits and context
- This is a synthetic benchmark for future Gaia DR4 pipelines, not a count of detected planets.
Key claims
A public DR4-like catalog injects more than 15 million null, one-companion and two-companion systems to stress-test astrometric orbit fitting.
Qualification: This is a synthetic benchmark for future Gaia DR4 pipelines, not a count of detected planets.
Evidence: source-2026-11-05-004
Sources
- arXiv preprint 2611.06915, original v1arXiv · primary research
Corrections
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