astro.wikisort.org - Meteorite
Kepler-34b (formally Kepler-34(AB)b) is a circumbinary planet announced with Kepler-35b. It is a small gas giant that orbits every ~288 days around two stars. Despite the planet's relatively long orbital period, its existence could be confirmed quickly due to transiting both of its host stars.
| Discovery | |
|---|---|
| Discovery date | 01-11-2012 |
Detection method | Transit (Kepler Mission) |
| Orbital characteristics | |
| Epoch BJD 2454969.2000 | |
Semi-major axis | 1.0896 ± 0.0009 AU (163,000,000 ± 130,000 km) |
| Eccentricity | 0.182 +0.0016 −0.0020 |
Orbital period (sidereal) | 288.822 +0.063 −0.081 d |
| Inclination | 90.355 +0.026 −0.018 |
Longitude of ascending node | −1.74 +0.14 −0.16 |
Longitude of periastron | 106.5 +2.5 −2.0 |
| Star | Kepler-34 |
| Physical characteristics | |
Mean radius | 0.764 +0.0012 −0.0014 RJ 8.56 REarth |
| Mass | 0.220 +0.011 −0.010 MJ (69.9 MEarth) |
Mean density | 0.613 +0.045 −0.041 g cm−3 |
Surface gravity | 936 +57 −54 m/s² |
| Temperature | 323 |
The Kepler-34b is unlikely to form at the current orbit, and likely migrated early from birth orbit beyond 1.5 AU away from parent binary stars, suffering multiple giant impacts in the process.[1] The eccentricity of planetary orbit may be acquired on the last stage of migration, due to interaction with the residual debris disk,[2] or by ejection of the second planet.[3]
References
- FORMING CIRCUMBINARY PLANETS: N-BODY SIMULATIONS OF KEPLER-34, 2014, arXiv:1402.0509
- Migration and gas accretion scenarios for the Kepler 16, 34 and 35 circumbinary planets, 2013, arXiv:1307.0713
- THE SCATTERING OUTCOMES OF KEPLER CIRCUMBINARY PLANETS: PLANET MASS RATIO, 2017, arXiv:1709.04433
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На других языках
[de] Kepler-34 b
Kepler-34 b ist ein Exoplanet im Doppelsternsystem Kepler-34, der ca. 4.900 Lichtjahre von der Erde entfernt im Sternbild Schwan liegt. Sein Radius ist etwa so groß wie derjenige des Planeten Saturn. Für einen Umlauf benötigt Kepler-34 b 289 Tage.- [en] Kepler-34b
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