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arXiv 2312.04589gr-qcastro-ph.CO
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通过观测测量标量诱导引力波的速度

Measuring the speed of scalar induced gravitational waves from observations

Jun Li, Guang-Hai Guo

AI总结:

本文研究非光速传播的标量诱导引力波,解析推导其功率谱并分析多种标量谱,结合 CMB+BAO 与引力波观测约束速度效应。

摘要:

我们研究了以不同于光速的速度传播的标量诱导引力波。首先,我们基于传播速度和原初曲率扰动的谱,解析计算了标量诱导引力波功率谱的表达式。随后,我们讨论了若干种标量功率谱,包括单色功率谱、尺度不变功率谱和幂律功率谱,并得到了相应的分数能量密度。最后,我们结合 CMB+BAO 与引力波观测,对标量诱导引力波施加约束,并评估其速度所产生的信号特征。数值结果清楚地揭示了标量诱导引力波速度的影响。

英文摘要:

We investigate the scalar induced gravitational waves which propagate with a speed different from the speed of light. First, we analytically calculate the expression of the power spectrum of the scalar induced gravitational waves which is based on the speed and the spectrum of the primordial curvature perturbations. Then, we discuss several scalar power spectra and obtain corresponding fractional energy density, such as the monochromatic power spectrum, the scale invariant power spectrum and the power-law power spectrum. Finally, we constrain the scalar induced gravitational waves and evaluate the signatures of the speed from the combination of CMB+BAO and gravitational waves observations. The numerical results are obvious to reveal the influence of speed of scalar induced gravitational waves.

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。

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