An exomoon survey of 70 cool giant exoplanets and the new candidate Kepler-1708 b-i

被引：51

作者：

Kipping, David ^{[1
]}

Bryson, Steve ^{[2
]}

Burke, Chris ^{[3
,4
]}

Christiansen, Jessie ^{[5
]}

Hardegree-Ullman, Kevin ^{[5
]}

Quarles, Billy ^{[6
]}

Hansen, Brad ^{[7
]}

Szulagyi, Judit ^{[8
]}

Teachey, Alex ^{[9
]}

机构：

[1] Columbia Univ, Dept Astron, New York, NY 10027 USA

[2] NASA, Ames Res Ctr, Mountain View, CA USA

[3] MIT, Dept Phys, Cambridge, MA 02139 USA

[4] MIT, Kavli Inst Astrophys & Space Res, Cambridge, MA 02139 USA

[5] Caltech IPAC NASA Exoplanet Sci Inst, Pasadena, CA USA

[6] Valdosta State Univ, Dept Phys Astron Geosci & Engn Technol, Valdosta, GA USA

[7] UCLA, Mani Bhaum Inst Theoret Phys, Dept Phys & Astron, Los Angeles, CA USA

[8] Swiss Fed Inst Technol, Inst Particle Phys & Astrophys, Zurich, Switzerland

[9] Acad Sinica, Inst Astron & Astrophys, Taipei, Taiwan

来源：

NATURE ASTRONOMY | 2022年 / 6卷 / 03期

基金：

欧洲研究理事会;

关键词：

TRANSIT DETECTABILITY; ORBITAL ECCENTRICITY; EXTRASOLAR; PLANETS; SATELLITES; PHOTOMETRY; EVOLUTION; EFFICIENT; SYSTEMS;

D O I：

10.1038/s41550-021-01539-1

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Exomoons represent a crucial missing puzzle piece in our efforts to understand extrasolar planetary systems. To address this deficiency, we here describe an exomoon survey of 70 cool, giant transiting exoplanet candidates found by Kepler. We identify only one exhibiting a moon-like signal that passes a battery of vetting tests: Kepler-1708 b. We show that Kepler-1708 b is a statistically validated Jupiter-sized planet orbiting a Sun-like quiescent star at 1.6 au. The signal of the exomoon candidate, Kepler-1708 b-i, is a 4.8 sigma effect and is persistent across different instrumental detrending methods, with a 1% false-positive probability via injection-recovery. Kepler-1708 b-i is similar to 2.6 Earth radii and is located in an approximately coplanar orbit at similar to 12 planetary radii from its similar to 1.6 au Jupiter-sized host. Future observations will be necessary to validate or reject the candidate.

引用

页码：367 / +

页数：19

共 111 条

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