论文标题
丽莎对来自声波重力波的敏感性
LISA Sensitivity to Gravitational Waves from Sound Waves
论文作者
论文摘要
在早期宇宙中强一阶相变的原始血浆中声波产生的引力波（GWS）将成为即将到来的激光干涉仪空间天线（LISA）实验的主要目标。在简短的说明中，我根据最近在[1909.11356，2002.04615]中引入的峰综合灵敏度曲线（PISC）的概念，对丽莎对这种类型的GW信号的预期敏感性进行了全球图像。特别是，我使用Lisa的PISC以紧凑的方式对十个不同的粒子物理模型中数千个基准点进行系统比较。提出的分析（i）保留了有关最佳信噪比的完整信息，（ii）允许不同的幂律指数描述信号的光谱形状，（iii）对紧凑型二进制文件产生了银河混淆噪声，（iv）表现出预期灵敏度对收集到的数据的依赖性。该分析的一个重要结果是，对于被考虑的模型集，银河混乱噪声通常会减少可观察到的情景数量，大约是两个因素，大约或多或少地与观察时间无关。本文介绍的数值结果也可在Zenodo [http://doi.org/10.5281/Zenodo.3837877]上获得。
Gravitational waves (GWs) produced by sound waves in the primordial plasma during a strong first-order phase transition in the early Universe are going to be a main target of the upcoming Laser Interferometer Space Antenna (LISA) experiment. In this short note, I draw a global picture of LISA's expected sensitivity to this type of GW signal, based on the concept of peak-integrated sensitivity curves (PISCs) recently introduced in [1909.11356, 2002.04615]. In particular, I use LISA's PISC to perform a systematic comparison of several thousands of benchmark points in ten different particle physics models in a compact fashion. The presented analysis (i) retains the complete information on the optimal signal-to-noise ratio, (ii) allows for different power-law indices describing the spectral shape of the signal, (iii) accounts for galactic confusion noise from compact binaries, and (iv) exhibits the dependence of the expected sensitivity on the collected amount of data. An important outcome of this analysis is that, for the considered set of models, galactic confusion noise typically reduces the number of observable scenarios by roughly a factor two, more or less independent of the observing time. The numerical results presented in this paper are also available on Zenodo [http://doi.org/10.5281/zenodo.3837877].
