论文标题
TNG50-3模拟的大型黑洞二进制物：I。合并和丽莎检测率
Massive Black Hole Binaries from the TNG50-3 Simulation: I. Coalescence and LISA Detection Rates
论文作者
论文摘要
我们评估了由重力波观测器激光干涉仪空间天线（LISA）靶向的巨大黑洞（MBH）二进制物的宇宙合并和检测率。我们的计算始于从TNG50-3宇宙学模拟中绘制的重力不结束的MBH对群，并使用我们先前的工作中开发的半分析模型遵循其从KPC量表一直到合并的轨道演化。我们发现，在大多数MBH对中，在哈勃时间摩擦中结合结合的MBH对是决定其合并速率的最重要机制。我们的模型预测MBH合并率<0.45/ yr，LISA检测率<0.34/ yr。大多数LISA检测应起源于10^6-10^6.8太阳能MBH在红移1.6 <z <2.4处富含气体的星系中，并且具有特征性的信号信号与噪声比100。但是，我们发现合并率和平均SNR的效果（如果降低了snr），以及对辐射送出的效果的平均降低，并将其降低。在这种情况下，MBH的合并率降低了78％（<0.1/ yr），LISA检测率降低了94％（至0.02/ yr），而平均SNR为〜10。我们强调，我们的模型在Lisa检测率中提供了与其他工程相一致的lisa检测率的下限，该模型与MB的模拟相一致。
We evaluate the cosmological coalescence and detection rates for massive black hole (MBH) binaries targeted by the gravitational wave observatory Laser Interferometer Space Antenna (LISA). Our calculation starts with a population of gravitationally unbound MBH pairs, drawn from the TNG50-3 cosmological simulation, and follows their orbital evolution from kpc scales all the way to coalescence using a semi-analytic model developed in our previous work. We find that for a majority of MBH pairs that coalesce within a Hubble time dynamical friction is the most important mechanism that determines their coalescence rate. Our model predicts a MBH coalescence rate < 0.45/ yr and a LISA detection rate < 0.34/ yr. Most LISA detections should originate from 10^6 - 10^6.8 solar masses MBHs in gas-rich galaxies at redshifts 1.6 < z < 2.4, and have a characteristic signal to noise ratio SNR ~ 100. We however find a dramatic reduction in the coalescence and detection rates, as well as the average SNR, if the effects of radiative feedback from accreting MBHs are taken into account. In this case, the MBH coalescence rate is reduced by 78% (to < 0.1/ yr), and the LISA detection rate is reduced by 94% (to 0.02/ yr), whereas the average SNR is ~ 10. We emphasize that our model provides a lower limit on the LISA detection rate, consistent with other works in the literature that draw their MBH pairs from cosmological simulations.
