在LIGO的第五次和处女座的第一次科学运行期间搜索与短伽马射线暴相关的引力波螺旋信号

计划在第一次高级LIGO数据运行中检索LIGO-GBM符合性

Planned search for LIGO-GBM coincidence in the first advanced LIGO data run

2015年秋季，将进行先进LIGO探测器的首次科学观测运行（O1）。根据LIGO汉福德和利文斯顿站点最近的调试进展，中子星双星螺旋的引力波探测器范围预计为60 Mpc。我们在这里描述我们的计划O1搜索之间的巧合LIGO引力波探测和费米伽马射线暴监视器的伽玛射线信号。这样的巧合将构成对引力波信号的电磁对应物的测量，具有显著的相应科学益处，包括揭示为伽马射线暴提供动力的中央引擎，增强对该事件作为真正的天体物理探测的信心，以及确定光子和引力子的相对速度。

中子星与黑洞：用LIGO/Virgo探测质量间隙

Neutron stars versus black holes: probing the mass gap with LIGO/Virgo

黑洞（BH）和/或中子星（NS）双星的吸气和合并被认为是地基引力波（GW）探测器的丰富来源。我们评估了先进的LIGO和处女座测量组件质量的能力，使用inspiral波形模型，包括自旋进动效应，使用一个大的GW源{ \bf随机取向和均匀分布的体积。对于1000个源，这产生在7和200之间的信噪比。我们对LIGO和Virgo如何区分BH和NS进行了定量预测，并评估了使用LIGO/Virgo观测来明确确认或拒绝NS（$m\leq3\ M_\odot$）和BH（$m\geq 5\ M_\odot$）之间存在假定的“质量差”的前景。我们发现，满足$m_2 \lesssim1.5\ M_\odot$的较小质量分量的源被明确地确定为包含至少一个NS，而具有$m_2\gtrsim6\ M_\odot$的系统将被确认为二进制BH。具有$m_2<5\ M_\odot$的二元BH（即，在间隙中）一般不能与NSBH二进制文件区分开。高质量的NS（$2<m<3$ $M_\odot$）通常与低质量的BH（$m<5\ M_\odot$）一致，这对单独从LIGO/Virgo观测中确定NS的最大质量提出了挑战。个别来源很少能得到足够好的测量，以确认质量差距中的物体，从检测到的总体中得出的统计推断将强烈依赖于潜在的分布。如果自然界恰好提供了一个质量分布，种群在啁啾质量空间中相对干净地分离，就像一些种群合成模型所建议的…

Measurement Accuracy of Inspiraling Eccentric Neutron Star and Black Hole Binaries Using Gravitational Waves

In a recent paper, we determined the measurement accuracy of physical parameters for eccentric, precessing, non-spinning, inspiraling, stellar-mass black hole - black hole (BH-BH) binaries for the upcoming second-generation LIGO/VIRGO/KAGRA detector network at design sensitivity using the Fisher matrix method. Here we extend that study to a wide range of binary masses including neutron star - neutron star (NS-NS), NS-BH, and BH-BH binaries with BH masses up to $110 \, M_{\odot}$. The measurement error of eccentricity $e_{10 \,\rm Hz}$ at a gravitational-wave (GW) frequency of $10 \, {\rm Hz}$ …

层级三重并合：利用旋进信号检验霍金面积定理

Hierarchical triple mergers: testing Hawking's area theorem with the inspiral signals

本研究提出利用引力波可探测的层级三重并合事件的旋进信号检验霍金面积定理的新方法，模拟显示该方法可在O4/O5运行中验证面积定律，补充了现有检验手段。

LIGO第五次科学运行中全天空高频Einstein@Home搜索连续引力波的结果

Results of an all-sky high-frequency Einstein@Home search for continuous gravitational waves in LIGO's fifth science run

我们提出了一个高频全天空搜索的连续引力波从孤立的紧凑的物体在LIGO的第五次科学运行（S5）的数据，使用的计算能力的爱因斯坦@家志愿者计算项目。这是唯一一次专门的连续引力波搜索，在S5数据上探测这种高频范围。我们没有发现显著的候选信号，因此我们对连续引力波应变振幅设置了90%置信水平的上限。在搜索频率范围的较低端，大约1250 Hz，最受约束的上限是$5.0\times 10^{-24}$，而在较高端，大约1500 Hz，它是$6.2\times 10^{-24}$。根据这些上限，并假设主转动惯量的基准值为$10^{38}$ kg $\,$ m $^2$，我们可以排除在地球100 pc范围内，自转周期在1.3和1.6毫秒之间的椭圆率高于大约$2.8\times10^{-7}$的天体。

偏心致密双星吸气的形成及引力波发射在双星-单星碰撞中的作用

The Formation of Eccentric Compact Binary Inspirals and the Role of Gravitational Wave Emission in Binary-Single Stellar Encounters

离心双星的螺旋和合并导致引力波形不同于那些产生的圆形合并双星。动态环境可以组装具有高偏心率和{ \it LIGO}波段内的峰值频率的双星。在本文中，我们研究了发生在稠密恒星系统中的双星-单星散射，它是偏心螺旋双星的一个来源。在致密双星和单个物体之间的许多相互作用的特征是混沌共振，其中双星-单个系统在达到最终状态之前经历许多交换。在这些混沌共振期间，一对物体经历非常接近的通道的概率不可忽略。在这些近距离的通道中，引力波（GW）辐射会将大量的轨道能量和角动量从系统中带走，在某些情况下，这意味着一个比束缚的第三体的轨道周期更短的螺旋时间。我们通过分析论证和包括GW损失在内的数值散射实验，推导出了这种动态螺旋结果的截面。我们发现，动态吸气的横截面的增长与增加目标二进制半长轴，$a$，并为等质量的二进制它的规模为$a^{2/7}$。因此，我们预计，广泛的目标双星主要有助于生产这些相对论性的结果。我们估计，偏心inspirals约占百分之一的动态组装非偏心合并二进制文件。虽然这些事件是罕见的，我们表明，二进制单散射是一个更有效的形成渠道比单单捕获生产偏心吸气二进制，即使是适度的二进制分数。

利用双黑洞旋近检验Kerr性质

Testing the Kerr nature with binary black hole inspirals

本研究利用LVK引力波观测的双黑洞旋近数据，对流行的参数化非Kerr度规形变提出了约束，以在强场区域检验广义相对论。

External Attention Transformer：一种用于在模拟 Advanced LIGO 数据中识别双黑洞事件初始偏心率特征的鲁棒 AI 模型

External Attention Transformer: A Robust AI Model for Identifying Initial Eccentricity Signatures in Binary Black Hole Events in Simulated Advanced LIGO Data

提出基于 external attention transformer 与 CNN 结合的框架，用于在模拟 Advanced LIGO 数据中高效识别偏心率双黑洞引力波事件并准确表征其源属性。

地基探测器的中等质量比吸气的引力波

Gravitational waves from intermediate-mass-ratio inspirals for ground-based detectors

我们探讨了先进的LIGO探测引力波从中子星和恒星质量黑洞螺旋到中等质量（$M\sim 50 M_\odot$到$350 M_\odot$）黑洞的前景。我们估计这种\emph{intermediate-mass-ratio inspirals}（IMRI）的事件发生率高达$\sim 10$ - $30 \mathrm{yr}^{-1}$。我们的数值模拟表明，如果中心体不是一个黑洞，但它的度规是固定的，轴对称的，反射对称和渐近平坦的，那么波将可能是三周期的，作为一个黑洞。我们对Ryan（1995）的一个定理进行了推广，该定理认为波的三个基频及其频谱分量的复振幅的演化（原则上）编码了中心体度规的完整图、中心体与轨道之间能量和角动量交换的完整细节以及随时间演化的轨道要素。我们估计，先进的LIGO可以测量或约束中心体从克尔黑洞的偏差适度，但有趣的准确性。

Gravitational Waves from Accreting Neutron Stars undergoing Common-Envelope Inspiral

The common envelope phase is a likely formation channel for close binary systems containing compact objects. Neutron stars in common envelopes accrete at a fraction of the Bondi-Hoyle-Lyttleton accretion rate, since the stellar envelope is inhomogeneous, but may still be able to accrete at hyper-critical rates (though not enough to become black holes). We show that common envelope systems consisting of a neutron star with a massive primary may be gravitational wave sources detectable in the Advanced LIGO band as far away as the Magellanic Clouds. To characterize their evolution, we perform orb…

LIGO和GW151226引力波探测和广义引力理论（MOG）

LIGO GW150914 and GW151226 Gravitational Wave Detection and Generalized Gravitation Theory (MOG)

研究了广义引力理论中的引力波的性质。本文导出了两个致密天体的螺旋双星系统的线性化场方程和度规张量四极矩幂和半径减小量。描述自旋黑洞的广义克尔度规由其质量$M$和自旋参数$a=cS/GM^2$决定。LIGO-Virgo合作数据与较小的二元黑洞质量相吻合，与当前电磁，观察到的X射线二元黑洞质量上限$M\lesssim 10M_\odot$一致。

Measuring eccentricity in binary black hole inspirals with gravitational waves

When binary black holes form in the field, it is expected that their orbits typically circularize before coalescence. In galactic nuclei and globular clusters, binary black holes can form dynamically. Recent results suggest that $\approx5\%$ of mergers in globular clusters result from three-body interactions. These three-body interactions are expected to induce significant orbital eccentricity $\gtrsim 0.1$ when they enter the Advanced LIGO band at a gravitational-wave frequency of 10 Hz. Measurements of binary black hole eccentricity therefore provide a means for determining whether or not dy…

高级检测器时代通过GRB触发的检索检测GW吸气的展望

Outlook for detection of GW inspirals by GRB-triggered searches in the Advanced detector era

短而硬的伽马射线暴（GRB）被认为起源于两颗中子星（NS）或一颗中子星和一个黑洞（BH）的合并。如果这种情况是正确的，那么短伽马射线暴将伴随着强引力波（GW）的发射，可以被LIGO，Virgo，KAGRA和LIGO-India等GW天文台检测到。与全天候、全天时的GW搜索相比，外部触发的GW搜索具有时间和天空位置已知、GW幅度增大等优点。基于最近的联合LIGO-Virgo数据，我们的分析估计，和我们的蒙特卡罗模拟候选紧凑的二进制合并事件的信噪比的分布，我们找到了一个有效的敏感体积GRB触发的搜索，是约2倍以上的全天空，所有的时间搜索。对于NS-NS系统，喷流角为20度，伽马射线卫星视场为天空的10%，并且具有通常旋进的自旋，这使NS-NS短GRB和NS-BH短GRB关联的数量增加了一倍，达到NS-NS和NS-BH所有检测的3-4%。我们还调查的权力测试统计过剩的阈下事件列表中，并表明，这些是不太可能揭示一个阈下人口，直到发现GW协会短伽玛暴已经是例行的。最后，我们提供了有用的公式计算GW振幅的先验分布，从一个紧凑的二进制合并，对于一个给定的GW探测器网络和给定的天空位置。

Advanced LIGO中观测中子星黑洞双星的引力波形模型的精度

Accuracy of gravitational waveform models for observing neutron-star--black-hole binaries in Advanced LIGO

包含中子星和黑洞的致密天体双星合并辐射的引力波是地面引力波观测站Advanced LIGO和Advanced Virgo最有趣的来源之一。先进的LIGO将对$1.4\, M_\odot$中子星进入$10\,M_\odot$黑洞的最大距离为$\sim 900$ Mpc的螺旋敏感。实现这种灵敏度和提取所观察到的信号中的物理印记需要精确的二进制建模来构建模板波形。在NSBH双星中，黑洞可能具有显著的角动量（自旋），这会影响发射的引力波的相位演化。我们调查的能力后牛顿（PN）模板模型的引力波期间发出的NSBH双星的inspiral阶段。我们限制黑洞的自旋与轨道角动量对齐，并比较几个近似。我们研究的限制振幅波形是精确到3.5PN阶的轨道动力学和完整的2.5PN阶的自旋动力学。我们还考虑PN波形与最近导出的3.5PN自旋轨道和3 PN自旋轨道尾修正。我们比较这些近似的有效单体模型。对于所有这些模型，大的分歧开始于低到中等的黑洞自旋，特别是对于自旋与轨道角动量反对齐的双星。我们发现，这种分歧开始于早期的螺旋在$v \sim 0.2$为$χ_{BH} \sim 0.4$。PN自旋校正超出目前已知的最佳检测搜索和测量中子星-黑洞双星的参数将是必需的。虽然这使搜索变得复杂，但引力波信号对自旋动力学的强烈依赖性将使提取重要的天体物理信息成为可能。

我们能从GW 150914中真正推断出什么？

What can we really infer from GW 150914?

我们分析了由高级激光干涉引力波天文台（LIGO）宣布的事件GW 150914作为黑洞双星合并的引力波发射。我们表明，合并系统和新形成的克尔黑洞的参数可以提取的引力波发射的基本结果在吸气和合并阶段，没有复杂的数值模拟。我们惊人准确的估计是基于描述两种不同状态的教科书公式：1）在Landau和Lifshitz教科书中处理的二元螺旋分析，以及2）在Rees-Ruffini-Wheeler教科书中处理的粒子陷入黑洞。它强调，为了推断任何天体物理信息的质量系统的两个政权必须独立和观测约束LIGO，这似乎不是这样的。

Detecting Intermediate-Mass Ratio Inspirals From The Ground And Space

The detection of a gravitational capture of a stellar-mass compact object by a massive black hole (MBH) will allow us to test gravity in the strong regime. These sources form via two-body relaxation, by exchanging energy and angular momentum, and inspiral in a slow, progressive way down to the final merger. The range of frequencies is localised in the range of millihertz in the case of MBH of masses $\sim 10^6\,M_{\odot}$, i.e. that of space-borne gravitational-wave observatories such as LISA. In this article I show that, depending on their orbital parameters, intermediate-mass ratios (IMRIs) …

Searching for General Binary Inspirals with Gravitational Waves

We study whether binary black hole template banks can be used to search for the gravitational waves emitted by general binary coalescences. To recover binary signals from noisy data, matched-filtering techniques are typically required. This is especially true for low-mass systems, with total mass $M \lesssim 10 \, M_\odot$, which can inspiral in the LIGO and Virgo frequency bands for thousands of cycles. In this paper, we focus on the detectability of low-mass binary systems whose individual components can have large spin-induced quadrupole moments and small compactness. The quadrupole contrib…

Probing Crust Meltdown in Inspiraling Binary Neutron Stars

Thanks to recent measurements of tidal deformability and radius, the nuclear equation of state and structure of neutron stars are now better understood. Here, we show that through resonant tidal excitations in a binary inspiral, the neutron crust generically undergoes elastic-to-plastic transition, which leads to crust heating and eventually meltdown. This process could induce $\sim \mathcal{O}(0.1)$ phase shift in the gravitational waveform. Detecting the timing and induced phase shift of this crust meltdown will shed light on the crust structure, such as the core-crust transition density, wh…

在后旋引力波信号中中子星潮汐极化率的可测性

Measurability of the tidal polarizability of neutron stars in late-inspiral gravitational-wave signals

来自螺旋状中子中子星的引力波信号包含了核物质状态方程的信息。这一信息包含在两颗中子星的潮汐极化率参数的组合中，在螺旋晚期，也就是合并之前，这一信息最为清晰。我们使用最近定义的潮汐扩展的有效单体形式主义，构建一个受控的分析描述的频域定相的中子星吸入合并。利用这一解析描述，我们发现利用先进的LIGO-Virgo探测器网络可以从具有合理信噪比$ρ=16$的引力波信号中测量中子星的潮汐极化率参数。这个可测量性结果似乎适用于所有导致最大质量大于$1.97M_\odot$的核状态方程。我们还提出了一个很有前途的新的方式提取信息的核物质状态方程从相干分析的一个系综的引力波观测单独的二进制合并事件。

Evolution of inspiralling neutron star binaries: effects of tidal interactions and orbital eccentricities

Neutron star (NS) binaries formed dynamically may have significant eccentricities while emitting gravitational waves (GWs) in the LIGO/VIRGO band. We study tidal effects in such eccentric inspiralling NS binaries using a set of hybrid equations. The NS is modelled as a compressible ellipsoid, which can deform nonlinearly due to tidal forces, while the orbit evolution is treated with the post-Newtonian (PN) theory up to 2.5-PN order. We find that in general, the tidal interaction can accelerate the inspiral, and cause orbital frequency and phase shifts. For circular inspirals, our calculations …

吸气中子星双星的系统参数误差

Systematic parameter errors in inspiraling neutron star binaries

两颗中子星的合并是LIGO等探测器的重要引力波源。许多研究已经考虑了二进制参数（质量，自旋，勒夫数）可以测量的精度。在这里，我考虑的精度，这些参数可以确定的系统误差，由于波形近似的存在。这些近似包括截断后牛顿（PN）级数和忽略中子星（NS）自旋，潮汐变形，或轨道偏心率。所有这些效应都可能产生超过合理参数值的统计误差的系统误差。特别是，忽略自旋，偏心率，或高阶PN条款的原因在NS勒夫数显着的偏差。如果不控制这些系统误差，则无法用PN螺旋波形测量潮汐效应。

Common Envelope Wind Tunnel: The Effects of Binary Mass Ratio and Implications for the Accretion-Driven Growth of LIGO Binary Black Holes

We present three-dimensional local hydrodynamic simulations of flows around objects embedded within stellar envelopes using a "wind tunnel" formalism. Our simulations model the common envelope dynamical inspiral phase in binary star systems in terms of dimensionless flow characteristics. We present suites of simulations that study the effects of varying the binary mass ratio, stellar structure, equation of state, relative Mach number of the object's motion through the gas, and density gradients across the gravitational focusing scale. For each model, we measure coefficients of accretion and dr…

Searching for Mini Extreme Mass Ratio Inspirals with Gravitational-Wave Detectors

A compact object with a mass $\mathcal{O}(1 \sim 1000) M_{\odot}$, such as a black hole of stellar or primordial origin or a neutron star, and a much lighter exotic compact object with a subsolar mass could form a non-standard mini extreme mass ratio inspiral (EMRI) and emit gravitational waves within the frequency band of ground-based gravitational-wave detectors. These systems are extremely interesting because detecting them would definitively point to new physics. We study the capability of using LIGO/Virgo to search for mini-EMRIs and find that a large class of exotic compact objects can b…

Gravitational-wave Emission from a Primordial Black Hole Inspiraling inside a Compact Star: a Novel Probe for Dense Matter Equation of State

Primordial black holes of planetary masses captured by compact stars are widely studied to constrain their composition fraction of dark matter. Such a capture may lead to an inspiral process and be detected through gravitational wave signals. In this Letter, we study the post-capture inspiral process by considering two different kinds of compact stars, i.e., strange stars and neutron stars. The dynamical equations are numerically solved and the gravitational wave emission is calculated. It is found that the Advanced LIGO can detect the inspiraling of a $10^{-5}$ solar mass primordial black hol…

Extreme Gravity Tests with Gravitational Waves from Compact Binary Coalescences: (I) Inspiral-Merger

The observation of the inspiral and merger of compact binaries by the LIGO/Virgo collaboration ushered in a new era in the study of strong-field gravity. We review current and future tests of strong gravity and of the Kerr paradigm with gravitational-wave interferometers, both within a theory-agnostic framework (the parametrized post-Einsteinian formalism) and in the context of specific modified theories of gravity (scalar-tensor, Einstein-dilaton-Gauss-Bonnet, dynamical Chern-Simons, Lorentz-violating, and extra dimensional theories). In this contribution we focus on (i) the information carri…

Optimizing LIGO with LISA forewarnings to improve black-hole spectroscopy

The early inspiral of massive stellar-mass black-hole binaries merging in LIGO's sensitivity band will be detectable at low frequencies by the upcoming space mission LISA. LISA will predict, with years of forewarning, the time and frequency with which binaries will be observed by LIGO. We will, therefore, find ourselves in the position of knowing that a binary is about to merge, with the unprecedented opportunity to optimize ground-based operations to increase their scientific payoff. We apply this idea to detections of multiple ringdown modes, or black-hole spectroscopy. Narrowband tunings ca…

中子星的潮汐形变与实际状态方程及其在双星内旋中的引力波特征

Tidal deformability of neutron stars with realistic equations of state and their gravitational wave signatures in binary inspiral

中子星吸入的引力波信号的早期部分可能产生关于核物质状态方程的可靠信息。恒星内部结构对波形的影响由一个参数表征：潮汐变形能力λ，它测量恒星对伴星扰动潮汐场的四极形变。我们计算了一个广泛的状态方程的lambda，并发现lambda的值跨越一个数量级的状态方程模型考虑的范围。中子星状态方程与引力波观测的早期部分的inspiral之间的区别的可行性分析表明，在λ的测量误差急剧增加的总质量的二进制。将误差与λ的预期范围进行比较，我们发现，在100 Mpc的距离上对双星进行的高级LIGO观测只能探测异常僵硬的状态方程，而拟议中的爱因斯坦望远镜可能会看到一个干净的潮汐信号。

A Direct Probe of Mass Density Near Inspiraling Binary Black Holes

Now that LIGO has revealed the existence of a large number of binary black holes, identifying their origin becomes an important challenge. They might originate in more isolated regions of the galaxy or alternatively they might reside in dense environments such as galactic centers or globular clusters. In the latter case, their center of mass motion as well as their orbital parameters should lead to observable changes in the waveforms, which would reflect their gravitational interactions with the surrounding matter. This would be reflected in the gravitational wave signal by a net phase change …

Probing Einstein-dilaton Gauss-Bonnet Gravity with the inspiral and ringdown of gravitational waves

Gravitational waves from extreme gravity events such as the coalescence of two black holes in a binary system fill our observable universe, bearing with them the underlying theory of gravity driving their process. One compelling alternative theory of gravity -- known as Einstein-dilaton Gauss-Bonnet gravity motivated by string theory -- describes the presence of an additional dilaton scalar field coupled directly to higher orders of the curvature, effectively describing a "fifth force" interaction and the emission of scalar dipole radiation between two scalarized black holes. Most previous stu…

旋近中子星中的界面模式：一阶相变的引力波探针

Interface modes in inspiralling neutron stars: A gravitational-wave probe of first-order phase transitions

该研究提出旋近中子星中界面模式的共振潮汐激发是一阶相变的确凿引力波特征，通过相对论微扰理论及手征有效场论状态方程族，证明其可被下一代干涉仪探测，部分事件或可被LIGO A+捕捉。

紧凑的二元合并率：与LIGO/Virgo上限的比较

Compact Binary Merger Rates: Comparison with LIGO/Virgo Upper Limits

我们比较进化预测的双紧凑对象合并率密度与初始和即将到来的LIGO/室女座上限。我们发现：（i）由于先进探测器的宇宙学范围，目前将人口合成预测转换为合并率密度的方法是不够的。(ii)我们的乐观模型比BH-BH系统的初始LIGO/Virgo上限低18倍，这表明观测灵敏度的适度增加（2.5倍）可能会带来第一次探测或第一次引力波对双星演化的限制。(iii)恒星起源的大规模BH-BH合并应该在高级LIGO/Virgo中占主导地位，并且可以通过包括螺旋，合并和环降的模板检测到红移z=2。正常恒星（<150 Msun）可以产生这样的合并，总红移质量高达400 Msun。(iv)高黑洞出生踢可以严重限制大质量BH-BH系统的形成（无论是在孤立的双星还是在动态致密星系团演化中），因此即使在完全先进的LIGO/Virgo灵敏度下，也无法检测到这些系统。我们发现，低和高的黑洞出生踢是允许目前的观测电磁约束。(v)我们的大多数模型都能用先进的探测器探测到所有类型的合并（NS-NS，BH-NS，BH-BH）。许多大规模的BH-BH合并检测将表明小（如果有的话）大规模BH的出生踢。

我们能从GW 150914中真正推断出什么？（II）

What can we really infer from GW 150914? (II)

在最近的一封信中，我们概述了GW 150914的一些问题，我们在此提供更多细节。我们分析了由高级激光干涉引力波天文台（LIGO）宣布的事件GW 150914作为黑洞双星合并的引力波发射。我们表明，合并系统和新形成的克尔黑洞的参数，可以提取的引力波发射的基本结果，在吸气和合并阶段，没有详细的数值模拟。我们惊人地准确的估计是基于教科书公式描述两个不同的制度：1）的二进制inspiraling分析处理的朗道和Lifshitz教科书，2）陷入一个粒子到黑洞，治疗的里斯-鲁菲尼-惠勒教科书以及3）这两个制度之间的过渡后Detweiler的治疗粒子与非零角动量落在一个黑洞。它强调，为了推断任何天体物理信息的质量系统的两个政权必须独立和观测约束LIGO，这似乎不是这样的。

Multiband Observation of LIGO/Virgo Binary Black Hole Mergers in the Gravitational-wave Transient Catalog GWTC-1

The Advanced LIGO and Virgo detectors opened a new era to study black holes (BHs) in our Universe. A population of stellar-mass binary BHs (BBHs) are discovered to be heavier than previously expected. These heavy BBHs provide us an opportunity to achieve multiband observation with ground-based and space-based gravitational-wave (GW) detectors. In this work, we use BBHs discovered by the LIGO/Virgo Collaboration as indubitable examples, and study in great detail the prospects for multiband observation with GW detectors in the near future. We apply the Fisher matrix to spinning, non-precessing i…

首次 neutron star-black hole 合并-并吞-环形震荡分析

First eccentric inspiral-merger-ringdown analysis of neutron star-black hole mergers

本文首次使用非圆周波形模型分析 GW200105 事件，验证了 NSBH 合并的偏心性证据，并发现其他 NSBH 事件与零偏心性一致。

High accuracy post-Newtonian and numerical relativity comparisons involving higher modes for eccentric binary black holes and a dominant mode eccentric inspiral-merger-ringdown model

Spherical harmonic modes of gravitational waveforms for inspiraling compact binaries in eccentric orbits from post-Newtonian (PN) theory accurate to third post-Newtonian order, and those extracted from numerical relativity (NR) simulations for binary black holes (BBHs) are compared. We combine results from the two approaches (PN and NR) to construct time-domain hybrid waveforms that describe the complete evolution of BBH mergers through inspiral-merger-ringdown (IMR) stages. These hybrids are then used in constructing a fully analytical dominant mode ($\ell$=2, $|m|$=2) eccentric IMR model. A …

吸入和磁化中子星的精确演化：等质量双星

Accurate evolutions of inspiralling and magnetized neutron-stars: equal-mass binaries

通过执行新的，长期的和数值精确的广义相对论模拟磁化，等质量的中子星双星，我们调查的作用，现实的磁场可能在这些系统的演化。特别是，我们研究了磁场的演化，并表明它们可以通过加速坍缩成黑洞来影响合并时产生的超大质量中子星的生存。我们还提供了证据，即使纯粹的极向最初，磁场产生的环面周围的黑洞具有环形和极向分量的等效强度。当我们估计磁场对这些系统在螺旋过程中或合并后发出的引力波信号产生影响的可能性时，我们得出结论，对于现实的磁场强度B<~ 1 e12 G，这种影响可以被先进的LIGO或先进的Virgo等探测器探测到，但只是边缘。然而，在小质量双星的情况下，随着引力波探测器（如爱因斯坦望远镜）的发展，磁致变化可能会被检测到，在大于2 kHz的频率上具有更高的灵敏度。

一种用于探测加速旋近双星的引力波波形模型

A Gravitational Waveform Model for Detecting Accelerating Inspiraling Binaries

本文构建含恒定质心视线加速度的频域 TaylorF2 扰动波形，并评估先进地基探测器对加速旋近双星的可探测性及参数简并。

使用两个偏心参数对采用旋进—并合—铃振波形的双黑洞进行贝叶斯推断

Bayesian inference of binary black holes with inspiral-merger-ringdown waveforms using two eccentric parameters

本文提出用偏心率和相对论异常角两个参数描述偏心波形，基于 SEOBNRv4EHM 完成贝叶斯推断验证，并分析真实引力波事件，未发现明确偏心率证据。

追寻爱：在 LIGO-Virgo 数据中首次对具有大潮汐形变能力的致密天体进行模板化搜索

In Pursuit of Love: First Templated Search for Compact Objects with Large Tidal Deformabilities in the LIGO-Virgo Data

本文首次在 LIGO-Virgo 数据中对具有大潮汐形变能力的致密天体双星进行模板化搜索，未发现显著候选事件，并给出并合率上限及黑洞 Love 数约束。

Effective field theory for compact object evolution in binary inspirals

Using the effective field theory framework for extended objects we describe the evolution of spinning compact objects in the late inspiral of the coalescence of a binary, before the plunge and merger, by including leading order corrections due to spin, tides, dissipation and gravitational wave radiation. Our implementation is of particular relevance for probing the stellar structure of compact objects with gravitational wave observations. A spinning compact object in the effective field theory framework is described as a spinning point particle, with its finite size effects encoded in higher o…

双黑洞系统周围标量场的特性

Scalar fields around black hole binaries in LIGO-Virgo-KAGRA

研究双黑洞系统周围标量场的生长对引力波信号的影响，通过半解析波形模型和贝叶斯分析，获得对标量密度的上限，并发现GW190728可能具有轻标量环境。

嵌入AGN的恒星质量黑洞的辅助启发：“最终AU问题”的求解

Assisted Inspirals of Stellar Mass Black Holes Embedded in AGN Disks: Solving the "Final AU Problem"

本文研究了活动星系核自引力盘中形成的恒星质量黑洞双星的演化。由于三体散射和气体阻力的硬化是有效的机制，减少了半长轴的BHB半径的引力波接管，在时间尺度上比典型的AGN盘的寿命短。以观测为动机的假设，在活动星系盘的恒星形成率，我们发现一个磁盘引起的BHB合并率（$\mathcal{R} \sim 3~{\rm yr}^{-1}~{\rm Gpc}^{-3}$，但具有很大的不确定性），这是与现有的估计的BHB合并率，以及最近的先进LIGO探测GW150914暗示的近似BHB合并率。通过这条通道形成的BHB将经常与明亮的活动星系核联系在一起，这在未来引力波探测器阵列的天空误差区域内是相对罕见的。这个通道也可能拥有一个（潜在的瞬态）电磁对应物，这是由于合并后超级爱丁顿吸积到恒星质量的黑洞上。