研究质子-电子质量比变化的甲醇天体物理观测的实际限制
Practical Limitations on Astrophysical Observations of Methanol to Investigate Variations in the Proton-to-Electron Mass Ratio
摘要：
最近，几个研究小组研究了利用甲醇分子转动跃迁的天体物理观测来测量或限制质子-电子质量比（mu）的时空变化的可能性。在这里，我们概述了进行这种观测的一些实际考虑，包括目前存在的仪器和天体物理限制。这使我们得出结论，这样的观察是不可能能够改善证据，无论是对存在的变化，在质子-电子质量比超过一个数量级超过电流限制。
英文摘要：
The possibility of using astrophysical observations of rotational transitions in the methanol molecule to measure, or constrain temporal and spatial variations in the proton-to-electron mass ratio (mu) has recently been investigated by several groups. Here we outline some of the practical considerations of making such observations, including both the instrumental and astrophysical limitations which exist at present. This leads us to conclude that such observations are unlikely to be able to improve evidence either for, or against the presence of variations in the proton-to-electron mass ratio by more than an order of magnitude beyond current limits.
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