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Many Lonely Kepler Planets May Have Hidden Company
Population synthesis explains the low-signal “single” excess through detection geometry and orbital period without requiring a second planet population.
Summary
Population synthesis explains the low-signal “single” excess through detection geometry and orbital period without requiring a second planet population.
Kepler catalogued more one-transit systems than simple comparisons with multi-planet systems seemed to predict, including an excess of low-signal detections. ExoMOD simulations and the Kepler DR25 catalogue show how the survey itself can produce that pattern. Detecting several planets favors compact systems with shorter periods and stronger repeated signals; longer-period, lower-signal planets are therefore more likely to appear alone even when other planets exist but do not transit detectably. The authors argue that this geometry and period sensitivity can explain the low-SNR excess without invoking false positives or a distinct “Kepler dichotomy.” It is a population-model result, not confirmation of unseen planets around every single.
Why it matters
Population synthesis explains the low-signal “single” excess through detection geometry and orbital period without requiring a second planet population.
Limits and context
- Detecting several planets favors compact systems with shorter periods and stronger repeated signals; longer-period, lower-signal planets are therefore more likely to appear alone even when other planets exist but do not transit detectably.
- The authors argue that this geometry and period sensitivity can explain the low-SNR excess without invoking false positives or a distinct “Kepler dichotomy.” It is a population-model result, not confirmation of unseen planets around every single.
Key claims
Population synthesis explains the low-signal “single” excess through detection geometry and orbital period without requiring a second planet population.
Qualification: Detecting several planets favors compact systems with shorter periods and stronger repeated signals; longer-period, lower-signal planets are therefore more likely to appear alone even when other planets exist but do not transit detectably.
Evidence: source-2026-10-18-007
Sources
- arXiv preprint 2610.22349, original v1arXiv · primary research
Corrections
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