在宽双星引力测试中重新审视数据质量控制和多星建模：低加速度下MOND型引力异常的确认
Revisiting Data Quality Control and Multiple-star Modeling in Wide Binary Gravity Tests: Confirmation of MOND-type Gravitational Anomaly at Low Acceleration
浏览论文内容
中文总结 AI 辅助
该研究基于宽双星二维速度重新审视统计引力测试中的数据质量控制和多星系统建模，经多种测试表明适当操作无法消除低加速度引力异常，反而证实了MOND型引力异常，指出其他无异常结论是由多种因素导致。
中文摘要 AI 辅助
宽双星为在低加速度状态下直接探测引力提供了天然实验室。近期研究表明，间距大于数千天文单位的宽双星经历MOND型引力，增强因子γ约为1.3 - 1.6，但同期也有支持标准引力或无偏差的结果。本文基于宽双星在天空投影的二维速度，重新审视统计引力测试中的数据质量控制和多星系统建模问题。通过包括加速度平面测试、\(\tilde v\)分布测试和中位数\(\tilde v\)轮廓测试等广泛测试，表明适当的数据质量控制或多星建模的合理变化无法消除低加速度引力异常，反而证实了MOND型引力异常，与近期宽双星轨道的现实MOND解决方案一致。发现声称没有低加速度引力异常证据的研究，是由于未使用牛顿区域数据校准多星系统比例、引力测试中未考虑的数据质量控制偏差引入或低加速度区域统计不足导致的。
英文摘要
Wide binary stars provide natural laboratories for directly probing gravity in the low-acceleration regime, as dark matter inferred from any viable gravity has negligible effects on their internal dynamics. Various recent studies including Bayesian 3D analyses have shown that wide binaries with separations greater than several thousand astronomical units experience MOND-type gravity with a boost factor of $γ\approx 1.3-1.6$. However, results claiming preference for, or no deviation from, standard gravity have also been published during the same period, particularly highlighting the roles of data quality control and realistic modeling of multiple-star (i.e., triple and higher-order) systems that host hidden companion stars. Here we carefully reexamine the issues of data quality control and modeling multiple-star systems in statistical gravity tests based on sky-projected 2D velocities of wide binary stars. Through extensive tests including the acceleration-plane test, the $\tilde v$-distribution test, and the median-$\tilde v$-profile test (where $\tilde v$ is the sky-plane 2D relative velocity normalized by the Newtonian circular velocity between the two stars), we show that proper data quality control or reasonable variation in multiple-star modeling cannot remove the low-acceleration gravitational anomaly but confirms the MOND-type gravitational anomaly, particularly consistent with recent realistic MOND solutions of wide binary orbits. We find that studies claiming no evidence for the low-acceleration gravitational anomaly are consequences of bypassed calibration of the fraction of multiple-star systems using the Newtonian-regime data, bias-introduction in data quality control that is not taken into account in gravity tests, or insufficient statistics in the low-acceleration regime.
