Kepler-16 b：在共振室中安全
Kepler-16b: safe in a resonance cell
摘要：
开普勒16 b行星以环绕双星的轨道围绕着一个由两颗主序星组成的系统运行。我们在“向心距离-偏心率”平面上构造稳定性图，这表明开普勒-16 b处于混沌域的危险附近-就在轨道参数空间中的不稳定“牙齿”之间。开普勒-16 b之所以能存活下来，是因为它与中心双星的轨道共振接近于稳定的半整数11/2轨道，安全地位于由不稳定的5/1和6/1共振所包围的共振单元内。邻近的共振细胞是空的，因为它们被开普勒-16 b“净化”，这是由于与行星的一阶共振重叠。新发现的行星Kepler-34 b和Kepler-35 b也安全地位于混沌边界的共振细胞内。
英文摘要：
The planet Kepler-16b is known to follow a circumbinary orbit around a system of two main-sequence stars. We construct stability diagrams in the "pericentric distance - eccentricity" plane, which show that Kepler-16b is in a hazardous vicinity to the chaos domain - just between the instability "teeth" in the space of orbital parameters. Kepler-16b survives, because it is close to the stable half-integer 11/2 orbital resonance with the central binary, safe inside a resonance cell bounded by the unstable 5/1 and 6/1 resonances. The neighboring resonance cells are vacant, because they are "purged" by Kepler-16b, due to overlap of first-order resonances with the planet. The newly discovered planets Kepler-34b and Kepler-35b are also safe inside resonance cells at the chaos border.
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