论文标题
共同的包络演化和三重动力学，作为三星级系统Gaia 0007-1605的内部白色矮人 +棕色矮人二进制的潜在途径
Common envelope evolution and triple dynamics as potential pathways to form the inner white dwarf + brown dwarf binary of the triple star system Gaia 0007-1605
论文作者
论文摘要
最近发现的系统GAIA 0007-1605由白色矮人组成，棕色矮人和近距离的白色矮人三级非常类似于三个系统，该系统包含有史以来发现的白矮人的第一个过境行星候选者：WD 1856+534。我们以前曾认为，WD 1856+534中的内部二进制很可能是通过共同的包膜演化形成的，但三星动力学代表了另一种情况。在这里，我们分析了GAIA 0007-1605的不同编队场景。我们重建了系统的潜在共同包封的演变，并发现假设能源预算的标准参数提供了合理的解决方案。与其他近亲白矮 +棕色矮人二进制文件一致，与WD 1856 + 534相比，在共同包膜演化过程中，没有其他能源以了解系统的当前配置。此外，使用分析处方进行三动力动力学，我们表明von Zeipel-Lidov-kozai振荡可能会触发由于高偏心性的侵入而引发的潮汐迁移（E \ GTRSIM 0.997）。我们得出的结论是，Gaia 0007-1605中的内部二进制（其兄弟姐妹WD 1856+534）是通过共同的包膜演化，三重动力学或两种机制组合形成的。
The recently discovered system Gaia 0007-1605 consisting of a white dwarf with a close brown dwarf companion and a distant white dwarf tertiary very much resembles the triple system containing the first transiting planet candidate around a white dwarf ever discovered: WD 1856+534. We have previously argued that the inner binary in WD 1856+534 most likely formed through common envelope evolution but triple star dynamics represent an alternative scenario. Here we analyze different formation scenarios for Gaia 0007-1605. We reconstructed the potential common envelope evolution of the system and find that assuming standard parameters for the energy budget provides a reasonable solution. In agreement with other close white dwarf + brown dwarf binaries, and in contrast to WD 1856+534, no energy sources other than orbital energy during common envelope evolution are required to understand the current configuration of the system. In addition, using analytical prescriptions for triple dynamics, we show that Von Zeipel-Lidov-Kozai oscillations might have trigger tidal migration due to high eccentricity incursions (e \gtrsim 0.997). We conclude that the inner binary in Gaia 0007-1605, as its sibling WD 1856+534, formed either through common envelope evolution, triple dynamics or a combination of both mechanisms.
