AI 中文总结
本研究利用Gaia DR3数据，在近邻恒星中搜寻恒星引擎产生的技术信号，未发现相关信号，给出了恒星引擎总体的分数上限及总和上限。
AI 中文摘要
运行中的恒星引擎会向宿主恒星传递动量，在盖亚数据发布3（Gaia DR3）的观测期间可能产生近似持续的横向加速度。我们从406984颗经质量筛选、标称距离小于200 pc（约650光年）的Gaia DR3恒星中，利用已发表的8890个Acceleration7解，搜寻此类加速度。由于长周期双星和天体测量系统误差可产生类似天球曲率，我们将这些常规解释与一个宽分量一同建模，该分量可吸收任何剩余的持续加速度或模型失配。在a₀=2.60×10⁻⁴ m s⁻²处，几乎整个母样本都可被搜寻，对单侧95%轮廓极限点处评估的残差权重进行映射，得到母总体分数极限为1.21×10⁻⁵。将该分数乘以母样本大小，得到总和上限权重约为5个恒星当量，高于阈值。在最低加速度阈值附近，可搜寻的分数快速下降，因此相应界限主要描述搜寻的覆盖范围。未将任何单个源解释为技术信号。
英文摘要
An operating stellar engine that transfers momentum to its host star could produce an approximately persistent transverse acceleration during the Gaia Data Release 3 (DR3) observing epoch. We search for such accelerations among 406,984 quality-selected Gaia DR3 stars with nominal distances below 200 pc (about 650 light-years), using 8,890 published Acceleration7 solutions. Because long-period binaries and astrometric systematics can produce similar sky-plane curvature, we model these conventional explanations together with a broad component that can absorb any remaining persistent acceleration or model mismatch. At $a_0 = 2.60 \times 10^{-4}$ m s$^{-2}$, where essentially the entire parent sample is searchable, mapping the residual weights evaluated at the one-sided 95% profile-limit point gives a parent-population fraction limit of $1.21 \times 10^{-5}$. Multiplying this fraction by the parent-sample size gives a summed upper-limit weight of about five star-equivalents above the threshold. Toward the lowest acceleration thresholds, the searchable fraction declines rapidly, so the corresponding bounds primarily describe the reach of the search. No individual source is interpreted as a technological signal.
Comments12 pages, 4 figures, 3 tables. Accepted for publication in The Astrophysical Journal
