论文标题
脉动白矮人G117-B15A：仍然是最稳定的光学时钟
The pulsating white dwarf G117-B15A: still the most stable optical clock known
论文作者
论文摘要
自1974年以来就观察到了脉动氢气白矮星G 117-B15a。其主要脉动周期为215.19738823（63）S，在光学光曲线中观察到，仅通过（5.12 +/- 0.82）变化（5.12 +/- 0.82）x10^{-15} s/s，并且没有毛chithes do。观察到的周期变化率对应于620万年的脉动周期的变化1 s。我们证明，这种非凡的光学时钟可以继续对基本物理学施加严格的限制，例如对假设的暗物质颗粒的相互作用的约束，以及寻找外部替代伴侣的存在。
The pulsating hydrogen atmosphere white dwarf star G 117-B15A has been observed since 1974. Its main pulsation period at 215.19738823(63) s, observed in optical light curves, varies by only (5.12+/-0.82)x10^{-15} s/s and shows no glitches, as pulsars do. The observed rate of period change corresponds to a change of the pulsation period by 1 s in 6.2 million years. We demonstrate that this exceptional optical clock can continue to put stringent limits on fundamental physics, such as constraints on interaction from hypothetical dark matter particles, as well as to search for the presence of external substellar companions.
