...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The astronomical journal >A Search for Lost Planets in the Kepler Multi-planet Systems and the Discovery of the Long-period, Neptune-sized Exoplanet Kepler-150 f
【24h】

A Search for Lost Planets in the Kepler Multi-planet Systems and the Discovery of the Long-period, Neptune-sized Exoplanet Kepler-150 f

机译：在开普勒多行星系统中寻找失落的行星以及长周期海王星大小的系外行星开普勒150 f的发现

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The vast majority of the 4700 confirmed planets (CPs) and planet candidates discovered by the Kepler mission were first found by the Kepler pipeline. In the pipeline, after a transit signal is found, all data points associated with those transits are removed, creating a "Swiss cheese"-like light curve full of holes, which is then used for subsequent transit searches. These holes could render an additional planet undetectable (or "lost"). We examine a sample of 114 stars with 3+ CPs to evaluate the effect of this "Swiss cheesing." A simulation determines that the probability that a transiting planet is lost due to the transit masking is low, but non-negligible, reaching a plateau at ~3.3% lost in the period range of P?=?400–500 days. We then model all planet transits and subtract out the transit signals for each star, restoring the in-transit data points, and use the Kepler pipeline to search the transit-subtracted (i.e., transit-cleaned) light curves. However, the pipeline did not discover any credible new transit signals. This demonstrates the validity and robustness of the Kepler pipeline's choice to use transit masking over transit subtraction. However, a follow-up visual search through all the transit-subtracted data, which allows for easier visual identification of new transits, revealed the existence of a new, Neptune-sized exoplanet (Kepler-150 f) and a potential single transit of a likely false positive (FP) (Kepler-208). Kepler-150?f (P = 637.2 days, R⊕) is confirmed with >99.998% confidence using a combination of the planet multiplicity argument, an FP probability analysis, and a transit duration analysis.
机译：开普勒任务首次发现的4700个已确认行星（CP）和候选行星中的绝大多数是首先发现的。在管道中，找到运输信号后，将删除与这些运输相关的所有数据点，从而创建一个充满孔的类似于“瑞士奶酪”的光曲线，然后将其用于后续运输搜索。这些孔可能使其他行星无法检测（或“丢失”）。我们检查了3个CP超过114颗恒星的样本，以评估这种“瑞士起泡”的效果。通过模拟确定，由于过境掩蔽而造成的过失行星丢失的可能性较低，但不可忽略，在P？=？400-500天的范围内达到了约3.3％的平稳期。然后，我们对所有行星的过渡进行建模，并减去每颗恒星的过渡信号，以恢复过渡中的数据点，然后使用开普勒管道搜索经过过渡减去（即清洁后的过渡）的光曲线。但是，管道没有发现任何可信的新传输信号。这证明了开普勒管道选择使用运输掩蔽而非运输减法的有效性和鲁棒性。但是，通过对所有减去过境数据的后续跟踪搜索，可以更容易地目视识别新的过境，发现存在着一个新的海王星大小的系外行星（Kepler-150 f），并且可能存在一次（FP）（Kepler-208）。开普勒150？f（P = 637.2天，R⊕）结合行星多重性论证，FP概率分析和穿越持续时间分析，以> 99.998％的置信度得到确认。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号