论文标题
来自单个超级大质量黑洞二进制的超低频引力波作为标准警报器
Ultra-low-frequency gravitational waves from individual supermassive black hole binaries as standard sirens
论文作者
论文摘要
未来，可以通过PULSAR时机阵列（PTA）检测到由单个灵感的超级质量黑洞二进制二进制（SMBHB）产生的超低频引力波（GWS）。这些编码绝对宇宙距离的GW信号可以用作明亮和黑暗的警笛，可能会演变成精确的宇宙学探针。在这里，我们表明，在10年的观察期内，平方公里阵列中的PTA（包括100毫秒的脉冲星时代）可能会检测到约25个明亮的警报器和41个黑暗警报器。明亮的警报器与宇宙微波背景数据相结合，提供了与当前主流关节宇宙学观测值相当的功能，用于测量暗能量状态。黑暗警报器可以达到接近电流距离观测值的哈勃常数的测量精度。我们的结果表明，来自单个SMBHB的超低频GWS在研究暗能的性质和确定哈勃常数方面具有重要意义。
Ultra-low-frequency gravitational waves (GWs) generated by individual inspiraling supermassive black hole binaries (SMBHBs) at the centers of galaxies may be detected by pulsar timing arrays (PTAs) in the future. These GW signals, which encode absolute cosmic distances, can serve as bright and dark sirens, potentially evolving into a precise cosmological probe. Here, we show that a PTA in the era of the Square Kilometre Array, comprising 100 millisecond pulsars, could potentially detect about 25 bright sirens and 41 dark sirens over a 10-year observation period. The bright sirens, combined with cosmic microwave background data, offer capabilities comparable to current mainstream joint cosmological observations for measuring the equation of state of dark energy. The dark sirens could achieve a measurement precision of the Hubble constant close to that of current distance-ladder observations. Our results suggest that ultra-low-frequency GWs from individual SMBHBs are of great significance in investigating the nature of dark energy and determining the Hubble constant.
