arXiv:2502.09790astro-ph.EPastro-ph.IM2025-02被引 4

用深度学习提升2分钟TESS数据的行星信号识别,减少误报并聚焦后续观测。

ExoMiner++: Enhanced Transit Classification and a New Vetting Catalog for 2-Minute TESS Data

  • 融合光变趋势、星历等多源数据,增强对行星信号的区分能力。
  • 在14.7万待检信号中筛选出7330个新行星候选,准确率显著提升。
  • 适合行星搜寻团队使用,可大幅降低后续验证工作量。

我们提出ExoMiner++,一种改进的深度学习模型,用于提升2分钟TESS数据中的凌星信号分类精度。该模型引入周期图、通量趋势、差分图像、展开通量及航天器姿态控制数据作为额外诊断输入,有效区分凌星信号与复杂假阳性。通过结合开普勒高质量标注数据与TESS数据进行多源训练,缓解了TESS数据标签噪声和模糊性问题。ExoMiner++在各类分类与排序指标上均表现优异,显著缩小了后续验证的搜索范围。为服务系外行星研究社区,我们发布包含ExoMiner++分类结果与置信度评分的新TESS目录。在147,568个未标注的TCEs中,识别出7,330个行星候选,其中1,868个对应已有TESS天体兴趣目标(TOIs),69个为社区贡献的TOIs(CTOIs),新增50个CTOIs。此前在ExoFOP中标记为行星候选的2,506个TOIs中,有1,797个被重新确认为行星候选。这一筛选结果与卓越的排序性能使后续观测能集中于最可能的候选体,从而提高整体发现效率。

原文摘要 · Abstract (English)

We present ExoMiner++, an enhanced deep learning model that builds on the success of ExoMiner to improve transit signal classification in 2-minute TESS data. ExoMiner++ incorporates additional diagnostic inputs, including periodogram, flux trend, difference image, unfolded flux, and spacecraft attitude control data, all of which are crucial for effectively distinguishing transit signals from more challenging sources of false positives. To further enhance performance, we leverage multi-source training by combining high-quality labeled data from the Kepler space telescope with TESS data. This approach mitigates the impact of TESS's noisier and more ambiguous labels. ExoMiner++ achieves high accuracy across various classification and ranking metrics, significantly narrowing the search space for follow-up investigations to confirm new planets. To serve the exoplanet community, we introduce new TESS catalog containing ExoMiner++ classifications and confidence scores for each transit signal. Among the 147,568 unlabeled TCEs, ExoMiner++ identifies 7,330 as planet candidates, with the remainder classified as false positives. These 7,330 planet candidates correspond to 1,868 existing TESS Objects of Interest (TOIs), 69 Community TESS Objects of Interest (CTOIs), and 50 newly introduced CTOIs. 1,797 out of the 2,506 TOIs previously labeled as planet candidates in ExoFOP are classified as planet candidates by ExoMiner++. This reduction in plausible candidates combined with the excellent ranking quality of ExoMiner++ allows the follow-up efforts to be focused on the most likely candidates, increasing the overall planet yield.

系外行星深度学习数据挖掘TESS

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