论文标题
逃脱的那个：年轻的棕色矮人罗克（Roque）中的独特日食12
The one that got away: A unique eclipse in the young brown dwarf Roque 12
论文作者
论文摘要
我们报告了the骨的替代成员的善良棕色小矮人罗克12的深度，奇异的日食。 The eclipse was 0.65mag deep, lasted 1.3h, and was observed with two telescopes simultaneously in October 2002. No further eclipse was recorded, despite continuous monitoring with Kepler/K2 over 70d in 2015. There is tentative (2sigma) evidence for radial velocity variations of 5km/s, over timescales of three months.对日食的最佳解释是在怪异轨道上存在同伴。观察结果将偏心率限制为e> 0.5，p> 70d的周期，并且伴侣的质量为〜0.001-0.04msol。原则上，日食也有可能是由绕固定材料引起的。 Gaia和后来的LSST以及改善的径向速度约束可能会明确确认同伴的存在。这将使系统变成已知年龄的少数已知的黯然失色的二进制棕色矮人之一。
We report the discovery of a deep, singular eclipse of the bona fide brown dwarf Roque 12, a substellar member of the Pleiades. The eclipse was 0.65mag deep, lasted 1.3h, and was observed with two telescopes simultaneously in October 2002. No further eclipse was recorded, despite continuous monitoring with Kepler/K2 over 70d in 2015. There is tentative (2sigma) evidence for radial velocity variations of 5km/s, over timescales of three months. The best explanation for the eclipse is the presence of a companion on an eccentric orbit. The observations constrain the eccentricity to e>0.5, the period to P>70d, and the mass of the companion to ~0.001-0.04Msol. In principle it is also possible that the eclipse is caused by circum-sub-stellar material. Future data releases by Gaia and later LSST as well as improved radial velocity constraints may be able to unambiguously confirm the presence of the companion. This would turn the system into one of the very few known eclipsing binary brown dwarfs with known age.
