论文标题
在纳米赫兹重力波天空中寻找加利福
Looking out for the Galileon in the nanohertz gravitational wave sky
论文作者
论文摘要
我们研究了Galileon诱导的极化为脉冲星时阵列中交叉相关功率的随机引力背景。我们首先在加利昂的重力中工作，首先表明加利昂的标量重力波签名仅在其有效质量中编码，该质量由裸质量，保形耦合和t tadpole控制。然后，我们使用当前的纳米GARV数据集研究了Galileon诱导的标量极化的现象学，并将观察性约束放在这些限制上。我们的结果具有纵向空间相关性，指示$ 10^{ - 22} $ ev {subluminal} galileon，并将Galileon极化作为统计上令人信服的跨脉冲脉冲的统计引人入胜的空间相关性，如果有的话。
We study the polarizations induced by the Galileon as a stochastic gravitational wave background in the cross correlated power in a pulsar timing array. Working within Galileon gravity, we first show that the scalar gravitational wave signature of the Galileon is encoded solely in its effective mass, which is controlled by the bare mass, conformal coupling, and a tadpole. Then, we study the phenomenology of the Galileon induced scalar polarizations and place observational constraints on these using the present NANOGrav data set. Our results feature longitudinal spatial correlation, indicative of a $10^{-22}$ eV {subluminal} Galileon, and show the Galileon polarizations as a statistically compelling source of the observed spatial correlation across millisecond pulsars, if there is any.
