揭开μ Hz频率下的引力宇宙的面纱
Unveiling the Gravitational Universe at μ-Hz Frequencies
摘要：
我们提出了一个空间为基础的干涉仪测量引力波（GW）的天空在毫赫兹到$μ$ -Hz的频率范围。到21世纪40年代，介于激光干涉仪空间天线（LISA）和脉冲星定时阵列之间的$μ$ -Hz频带将构成与天体物理学有关的GW频谱覆盖范围的最大差距。然而，许多与天体物理学和宇宙学有关的悬而未决的问题，最好的答案是在这个波段的GW观测。我们表明，一个$μ$ -Hz GW探测器将是一个真正的总体天文台的科学界在很大程度上，极大地扩展了LISA的潜力。该仪器被设想用来探测早期螺旋状的高信噪比大质量黑洞双星和银河系中的低频恒星双星，它将成为从太阳邻域到高红移宇宙的多信使天文学的基石。
英文摘要：
We propose a space-based interferometer surveying the gravitational wave (GW) sky in the milli-Hz to $μ$-Hz frequency range. By the 2040s', the $μ$-Hz frequency band, bracketed in between the Laser Interferometer Space Antenna (LISA) and pulsar timing arrays, will constitute the largest gap in the coverage of the astrophysically relevant GW spectrum. Yet many outstanding questions related to astrophysics and cosmology are best answered by GW observations in this band. We show that a $μ$-Hz GW detector will be a truly overarching observatory for the scientific community at large, greatly extending the potential of LISA. Conceived to detect massive black hole binaries from their early inspiral with high signal-to-noise ratio, and low-frequency stellar binaries in the Galaxy, this instrument will be a cornerstone for multimessenger astronomy from the solar neighbourhood to the high-redshift Universe.
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