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EMERGING TRENDS IN A PERIOD-RADIUS DISTRIBUTION OF CLOSE-IN PLANETS

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Beaugé, C., Nesvorný, D.·2013·The Astrophysical Journal

Abstract

We analyze the distribution of extrasolar planets (both confirmed and Kepler candidates) according to their orbital periods P and planetary radii R . Among confirmed planets, we find compelling evidence for a paucity of bodies with 3 R ⊕ < R < 10 R ⊕ , where R ⊕ is Earth's radius and P < 2–3 days. We have christened this region a sub-Jovian Pampas . The same trend is detected in multiplanet Kepler candidates. Although approximately 16 Kepler single-planet candidates inhabit this Pampas, at least 7 are probable false positives (FPs). This last number could be significantly higher if the ratio of FPs is higher than 10%, as suggested by recent studies. In a second part of the paper we analyze the distribution of planets in the ( P , R ) plane according to stellar metallicities. We find two interesting trends: (1) a lack of small planets ( R < 4 R ⊕ ) with orbital periods P < 5 days in metal-poor stars and (2) a paucity of sub-Jovian planets (4 R ⊕ < R < 8 R ⊕ ) with P < 100 days, also around metal-poor stars. Although all these trends are preliminary, they appear statistically significant and deserve further scrutiny. If confirmed, they could represent important constraints on theories of planetary formation and dynamical evolution.

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Metadata

Authors
Beaugé, C., & Nesvorný, D.
Venue
The Astrophysical Journal
Published
2012-12-27
Volume
763
Issue
1
Pages
12
ISSN
  • 0004-637X (ISSN-L)
  • 1538-4357
OpenAlex
W1985371196
Cited by
188
References
6
FWCI
3.54
Type
journal article
Language
en
Open access
bronze

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CoChat. (2026). Citation check: EMERGING TRENDS IN A PERIOD-RADIUS DISTRIBUTION OF CLOSE-IN PLANETS. https://app.cochat.ai/papers/10.1088/0004-637x/763/1/12
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Beaugé, C., & Nesvorný, D. (2013). EMERGING TRENDS IN A PERIOD-RADIUS DISTRIBUTION OF CLOSE-IN PLANETS. The Astrophysical Journal. https://doi.org/10.1088/0004-637x/763/1/12

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