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arXiv 2602.24035astro-ph.GA
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用于测试引力的高质量框架:没有MOND的证据

A Quality Framework for Testing Gravity with Wide Binaries: No Evidence for MOND

University of Portsmouth(朴茨茅斯大学);California Institute of Technology(加州理工学院);Queen Mary University of London(伦敦大学玛丽女王学院);Leiden University(莱顿大学);University of Cambridge(剑桥大学)

Stephen A. Cookson, Indranil Banik, Kareem El-Badry, Will Sutherland, Zephyr Penoyre, Charalambos Pittordis, Cathie J. Clarke

AI总结:

本文提出一个严格框架用于测试宽双星引力,通过高质量样本选择和过滤,发现宽双星的相对速度分布不支持MOND预测的增强效应,排除了MOND的可能。

摘要:

宽双星(WBs)为在低加速度区域测试引力提供了独特机会,其中Milgromian动力学(MOND)预测与牛顿引力的可测量偏差。我们构建了一个严格框架用于宽双星测试(WBT),强调高质量样本选择、过滤较差的天体测量解、污染缓解和不确定性传播。我们表明未检测到的近双星、偶然对齐和投影效应的不当处理可以模仿MOND-like信号。我们引入了一套最佳实践清单以识别和避免这些陷阱。应用此框架于Gaia DR3数据,我们编译了一个高纯度的WB样本,距离在130 pc内,投影分离在1-30 kAU之间,横跨牛顿与MOND区域。我们发现宽双星的缩放相对速度分布不显示预期的20%增强,与牛顿引力在所有分离下一致。对先前WBT的元分析显示,看似MOND信号随着方法学严谨性提高而减弱。我们得出结论,当应用严格质量控制时,宽双星中没有观测到MOND引起的速度增强。我们的结果对在a0/10到200a0范围内运行的修改引力理论施加了强经验约束。在这一范围内,牛顿引力比MOND更可能高达1500倍。

英文摘要:

Wide binaries (WBs) offer a unique opportunity to test gravity in the low-acceleration regime, where modifications such as Milgromian dynamics (MOND) predict measurable deviations from Newtonian gravity. We construct a rigorous framework for conducting the wide binary test (WBT), emphasizing high quality sample selection, filtering of poor astrometric solutions, contamination mitigation, and uncertainty propagation. We show that undetected close binaries, chance alignments, and improper treatment of projection effects can mimic MOND-like signals. We introduce a checklist of best practices to identify and avoid these pitfalls. Applying this framework to Gaia DR3 data, we compile a high-purity sample of WBs within 130 pc with projected separations of 1 - 30 kAU, spanning the transition between the Newtonian and MOND regimes. We find that the scaled relative velocity distribution of wide binaries does not exhibit the 20% enhancement expected from MOND and is consistent with Newtonian gravity across all separations. A meta-analysis of previous WBTs shows that apparent MOND signals diminish as methodological rigour improves. We conclude that when stringent quality controls are applied, there is no observational evidence for MOND-induced velocity boosts in wide binaries. Our results place strong empirical constraints on modified gravity theories operating between a0/10 and 200 a0, where a0 is the MOND acceleration scale. Across this range of internal accelerations, Newtonian gravity is up to 1500x more likely than MOND for our cleanest sample.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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