Astrophysics and cosmology with a decihertz gravitational-wave detector: TianGO
Astrophysics and cosmology with a decihertz gravitational-wave detector: TianGO
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DOI：
10.1103/physrevd.102.043001
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发表时间：
2019-08
影响因子：
5
通讯作者：
K. Kuns;Hang Yu;Yanbei Chen;R. Adhikari
中科院分区：
文献类型：
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作者：
K. Kuns;Hang Yu;Yanbei Chen;R. Adhikari
我们提出了基于空间的天体物理科学案例，分贝引力波（GW）探测器。我们特别强调了一种推断源的天空位置的能力，既可以与地面探测器网络结合形成一个长三角测量基线，也可以单独用于合并事件的早期预警。如此精确的位置测量是使用GW信号作为约束哈勃常数的标准警报的关键。这种探测器还通过分别限制具有超钱德拉塞卡质量和次钱德拉塞卡质量的白矮星双星的合并率，为检验Ia型超新星祖先假说提供了可能性。我们将讨论其他可以提供的科学成果，包括早期宇宙结构形成的约束，中等质量黑洞的搜索，黑洞自旋的精确测定，双星系统轨道偏心演化的探测，以及对合并双星周围第三系质量的探测。
We present the astrophysical science case for a space-based, decihertz gravitational-wave (GW) detector. We particularly highlight an ability to infer a source’s sky location, both when combined with a network of ground-based detectors to form a long triangulation baseline, and by itself for the early warning of merger events. Such an accurate location measurement is the key for using GW signals as standard sirens for constraining the Hubble constant. This kind of detector also opens up the possibility to test type Ia supernovae progenitor hypotheses by constraining the merger rates of white dwarf binaries with both super- and sub-Chandrasekhar masses separately. We will discuss other scientific outcomes that can be delivered, including the constraint of structure formation in the early Universe, the search for intermediate-mass black holes, the precise determination of black hole spins, the probe of binary systems’ orbital eccentricity evolution, and the detection of tertiary masses around merging binaries.