Stochastic Gravitational Wave Background from Cosmological Supernovae
Stochastic Gravitational Wave Background from Cosmological Supernovae
复制标题
宇宙超新星的随机引力波背景
DOI：
10.1103/physrevd.72.084001
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发表时间：
2004
影响因子：
5
通讯作者：
E. Müller
中科院分区：
文献类型：
--
作者：
A. Buonanno;G. Sigl;G. Raffelt;H. Janka;E. Müller
基于对超新星（SNe）作为引力波（GW）源的理解的新进展，我们估计了所有宇宙SNe的GW背景。对于1 Hz左右的宽频率范围，这个背景与标准暴胀模型所预期的GW背景大致相当。虽然我们的估计在几个数量级内仍然不确定，但SN GW背景可能会被第二代天基干涉仪（如拟议的大爆炸天文台）探测到。出于同样的原因，SN GW可以成为搜索暴胀GW的前景，特别是对于SN背景为高斯并且BBO将最敏感的亚Hz频率。SN模拟持续时间远远超过通常的截止时间约1秒，需要更强大的预测在亚Hz频带。一个更大的GW背景可能来自假设的大质量恒星的早期人口，尽管它们的GW源强度以及它们的丰度目前还知之甚少。
Based on new developments in the understanding of supernovae (SNe) as gravitational-wave (GW) sources we estimate the GW background from all cosmic SNe. For a broad range of frequencies around 1 Hz, this background is crudely comparable to the GW background expected from standard inflationary models. While our estimate remains uncertain within several orders of magnitude, the SN GW background may become detectable by second-generation space-based interferometers such as the proposed Big Bang Observatory (BBO). By the same token, the SN GWs may become a foreground for searches of the inflationary GWs, in particular, for sub-Hz frequencies where the SN background is Gaussian and where the BBO will be most sensitive. SN simulations lasting far beyond the usual cutoff of about 1 s are needed for more robust predictions in the sub-Hz frequency band. An even larger GW background can arise from a hypothetical early population of massive stars, although their GW source strength as well as their abundance are currently poorly understood.