论文标题
来自原始标量和张量扰动的重力波
Gravitational waves from primordial scalar and tensor perturbations
论文作者
论文摘要
我们研究了以辐射为主时代的原始标量和张量扰动引起的二阶重力波。提出了二阶GW的功率光谱的明确表达式。我们计算单色原始功率谱的二阶GWS的能量密度光谱。对于$ k $ $ \ weft（k> k_* \右）$，原始张量扰动（张张量比比率）的效果$ r = a_ {h}/a_ζ= 0.2$导致$ 50 \％$ 50 \％$ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $增加了信号对噪声比率（SNR）的观察。
We investigate the second order gravitational waves induced by the primordial scalar and tensor perturbations during radiation-dominated era. The explicit expressions of the power spectra of the second order GWs are presented. We calculate the energy density spectra of the second order GWs for a monochromatic primordial power spectra. For large $k$ $\left( k>k_* \right)$, the effects of the primordial tensor perturbation with tensor-to-scalar ratio $r=A_{h}/A_ζ=0.2$ lead to an around $50\% $ increase of the signal-to-noise ratio (SNR) for LISA observations.
