The scalar–tensor–vector–gravity (STVG), a prototype of modified gravity developed by Moffat, can correctly explain galaxy rotation curves, cluster dynamics, Bullet Cluster phenomena and cosmological data without invoking the observationally elusive general relativistic (GR) dark matter. Further, recent observations of neutron star masses are shown to defy some GR predictions, whereas STVG turns out to be more consistent with those observations. These successes indicate that STVG could be a potential candidate for a new theory of gravity. However, an important question concerns the possible range of values of the STVG dimensionless parameter α imposed by various physical scenarios. In the literature, the range 0.03 < α < 2.47 corresponding to different central source masses has been suggested. We show here that the α can be considerably constrained into the range 0 < α < 10−5 assuming that the updated GPS fluctuation does not exceed the α-dependent correction to the terrestrial Sagnac delay.

中文翻译：

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标量-张量-矢量-重力的陆地萨格纳克延迟

标量-张量-矢量-重力（STVG）是莫法特开发的修正重力原型，可以正确解释星系旋转曲线、星团动力学、子弹星团现象和宇宙学数据，而无需调用观测难以捉摸的广义相对论（GR）暗物质。此外，最近对中子星质量的观测显示与一些 GR 预测相悖，而 STVG 与这些观测结果更一致。这些成功表明，STVG 可能成为新引力理论的潜在候选者。然而，一个重要的问题涉及 STVG 无量纲参数的可能值范围α由各种物理场景强加。在文献中，范围0.03 < α < 2.47已建议对应于不同的中心源质量。我们在这里表明α可以大大限制在范围内0 < α < 10-5假设更新后的 GPS 波动不超过α- 对地面 Sagnac 延迟的依赖校正。