用FIR精细结构谱线检验基本常数随宇宙历元变化的新方法
A new approach for testing variations of fundamental constants over cosmic epochs using FIR fine-structure lines
摘要：
目标。获得精细结构常数α和电子-质子质量比μ在不同宇宙学时期的变化极限。方法.提出了一种基于CO远红外精细结构谱线和低位转动跃迁谱线红移比较的新方法，该方法的灵敏度比类星体金属吸收谱线高10倍。结果对两个遥远的类星体J1148+5251（z = 6.42）和BR 1202 -0725（z = 4.69）的商F = α ^2/μ的估计分别为Δ F/F =（0.1+/-1.0 10 ^{-4}和（1.4+/-1.5 10 ^{-4}）。所获得的限度与在13 Gyr期间在0.01%水平下物理常数无变化一致。结论.即将到来的观测类星体和遥远的星系在FIR精细结构线的不同物种和CO低旋转线在SOFIA，HSO和ALMA预计将提高电流限制，至少，一个数量级。
英文摘要：
Aims. To obtain limits on the variation of the fine-structure constant alpha and the electron-to-proton mass ratio mu over different cosmological epochs. Methods. A new approach based on the comparison of redshifts of far infrared (FIR) fine-structure lines and low-lying rotational transitions in CO is proposed which is in principle more sensitive by a factor of 10 compared to QSO metal absorption lines. Results. Estimations of the quotient F = alpha^2/mu obtained for two distant quasars J1148+5251 (z = 6.42) and BR1202-0725 (z = 4.69) provide Delta F/F = (0.1+/-1.0)10^{-4} and (1.4+/-1.5)10^{-4}, respectively. The obtained limits are consistent with no variation of physical constants at the level of 0.01% over a period of 13 Gyr. Conclusions. Upcoming observations of quasars and distant galaxies in FIR fine-structure lines of different species and in CO low rotational lines at the SOFIA, HSO, and ALMA are expected to improve the current limit by, at least, an order of magnitude.
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。
