scholarly journals Science with the TianQin observatory: Preliminary results on stellar-mass binary black holes

2020 ◽  
Vol 101 (10) ◽  
Author(s):  
Shuai Liu ◽  
Yi-Ming Hu ◽  
Jian-dong Zhang ◽  
Jianwei Mei
Keyword(s):  
Black Holes ◽  
Stellar Mass ◽  
Binary Black Holes ◽  
Preliminary Results

scholarly journals The missing link in gravitational-wave astronomy

2021 ◽  
Author(s):  
Manuel Arca Sedda ◽  
Christopher P. L. Berry ◽  
Karan Jani ◽  
Pau Amaro-Seoane ◽  
Pierre Auclair ◽  
...  
Keyword(s):  
Black Holes ◽  
Gravitational Wave ◽  
Particle Physics ◽  
Cosmic Time ◽  
Compact Object ◽  
Stellar Mass ◽  
Wave Band ◽  
Binary Black Holes ◽  
Tests Of General Relativity ◽  
Binary Neutron Star

AbstractSince 2015 the gravitational-wave observations of LIGO and Virgo have transformed our understanding of compact-object binaries. In the years to come, ground-based gravitational-wave observatories such as LIGO, Virgo, and their successors will increase in sensitivity, discovering thousands of stellar-mass binaries. In the 2030s, the space-based LISA will provide gravitational-wave observations of massive black holes binaries. Between the $\sim 10$ ∼ 10 –103 Hz band of ground-based observatories and the $\sim 10^{-4}$ ∼ 1 0 − 4 –10− 1 Hz band of LISA lies the uncharted decihertz gravitational-wave band. We propose a Decihertz Observatory to study this frequency range, and to complement observations made by other detectors. Decihertz observatories are well suited to observation of intermediate-mass ($\sim 10^{2}$ ∼ 1 0 2 –104M⊙) black holes; they will be able to detect stellar-mass binaries days to years before they merge, providing early warning of nearby binary neutron star mergers and measurements of the eccentricity of binary black holes, and they will enable new tests of general relativity and the Standard Model of particle physics. Here we summarise how a Decihertz Observatory could provide unique insights into how black holes form and evolve across cosmic time, improve prospects for both multimessenger astronomy and multiband gravitational-wave astronomy, and enable new probes of gravity, particle physics and cosmology.

scholarly journals mocca-survey Database I: Binary black hole mergers from globular clusters with intermediate mass black holes

2020 ◽  
Vol 498 (3) ◽  
pp. 4287-4294
Author(s):  
Jongsuk Hong ◽  
Abbas Askar ◽  
Mirek Giersz ◽  
Arkadiusz Hypki ◽  
Suk-Jin Yoon
Keyword(s):  
Black Holes ◽  
Black Hole ◽  
Gravitational Waves ◽  
Globular Clusters ◽  
Stellar Mass ◽  
Intermediate Mass ◽  
Binary Black Holes ◽  
Black Hole Binaries ◽  
Binary Black Hole ◽  
Intermediate Mass Black Holes

ABSTRACT The dynamical formation of black hole binaries in globular clusters that merge due to gravitational waves occurs more frequently in higher stellar density. Meanwhile, the probability to form intermediate mass black holes (IMBHs) also increases with the density. To explore the impact of the formation and growth of IMBHs on the population of stellar mass black hole binaries from globular clusters, we analyse the existing large survey of Monte Carlo globular cluster simulation data (mocca-survey Database I). We show that the number of binary black hole mergers agrees with the prediction based on clusters’ initial properties when the IMBH mass is not massive enough or the IMBH seed forms at a later time. However, binary black hole formation and subsequent merger events are significantly reduced compared to the prediction when the present-day IMBH mass is more massive than ${\sim}10^4\, \rm M_{\odot }$ or the present-day IMBH mass exceeds about 1 per cent of cluster’s initial total mass. By examining the maximum black hole mass in the system at the moment of black hole binary escaping, we find that ∼90 per cent of the merging binary black holes escape before the formation and growth of the IMBH. Furthermore, large fraction of stellar mass black holes are merged into the IMBH or escape as single black holes from globular clusters in cases of massive IMBHs, which can lead to the significant underpopulation of binary black holes merging with gravitational waves by a factor of 2 depending on the clusters’ initial distributions.

scholarly journals Lensing magnification: gravitational waves from coalescing stellar-mass binary black holes

2021 ◽  
Vol 508 (1) ◽  
pp. 1253-1261
Author(s):  
Xikai Shan ◽  
Chengliang Wei ◽  
Bin Hu
Keyword(s):  
Black Holes ◽  
Gravitational Waves ◽  
Estimation Error ◽  
Orientation Angle ◽  
Distance Estimation ◽  
Selection Effect ◽  
Stellar Mass ◽  
Unbiased Estimation ◽  
Luminosity Distance ◽  
Binary Black Holes

ABSTRACT Gravitational waves (GWs) may be magnified or de-magnified due to lensing. This phenomenon will bias the distance estimation based on the matched filtering technique. Via the multi-sphere ray-tracing technique, we study the GW magnification effect and selection effect with particular attention to the stellar-mass binary black holes. We find that, for the observed luminosity distance $\lesssim 3\, \mathrm{Gpc}$, which is the aLIGO/Virgo observational horizon limit, the average magnification keeps as unity, namely unbiased estimation, with the relative distance uncertainty $\sigma (\hat{d})/\hat{d}\simeq 0.5{{\ \rm per\ cent}}\sim 1{{\ \rm per\ cent}}$. Beyond this observational horizon, the estimation bias can not be ignored, and with the scatters $\sigma (\hat{d})/\hat{d} = 1{{\ \rm per\ cent}}\sim 15{{\ \rm per\ cent}}$. Furthermore, we forecast these numbers for Einstein Telescope (ET). We find that the average magnification keeps closely as unity for the observed luminosity distance $\lesssim 90\, \mathrm{Gpc}$. The luminosity distance estimation error due to lensing for ET is about $\sigma (\hat{d})/\hat{d} \simeq 10{{\ \rm per\ cent}}$ for the luminosity distance $\gtrsim 25\, \mathrm{Gpc}$. Unlike the aLIGO/Virgo case, this sizable error is not due to the selection effect. It purely comes from the unavoidably accumulated lensing magnification. Moreover, we investigated the effects of the orientation angle and the BH mass distribution models. We found that the results are strongly dependent on these two components.

scholarly journals Multiband observation of LIGO/Virgo binary black hole mergers in the gravitational-wave transient catalog GWTC-1

2020 ◽  
Vol 496 (1) ◽  
pp. 182-196 ◽  
Author(s):  
Chang Liu ◽  
Lijing Shao ◽  
Junjie Zhao ◽  
Yong Gao
Keyword(s):  
Black Holes ◽  
Gravitational Wave ◽  
Signal To Noise Ratio ◽  
Stellar Mass ◽  
Large Signal ◽  
Binary Black Holes ◽  
New Era ◽  
Binary Black Hole ◽  
Near Future ◽  
Multiple Detectors

ABSTRACT The Advanced LIGO and Virgo detectors opened a new era to study black holes (BHs) in our Universe. A population of stellar-mass binary black holes (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 inspiral-merger-ringdown waveforms, while taking the motion of space-based GW detectors fully into account. Our analysis shows that, detectors with decihertz sensitivity are expected to log stellar-mass BBH signals with very large signal-to-noise ratio and provide accurate parameter estimation, including the sky location and time to coalescence. Furthermore, the combination of multiple detectors will achieve unprecedented measurement of BBH properties. As an explicit example, we present the multiband sensitivity to the generic dipole radiation for BHs, which is vastly important for the equivalence principle in the foundation of gravitation, in particular for those theories that predict curvature-induced scalarization of BHs.

scholarly journals Archival searches for stellar-mass binary black holes in LISA data

2021 ◽  
Vol 103 (2) ◽  
Author(s):  
Becca Ewing ◽  
Surabhi Sachdev ◽  
Ssohrab Borhanian ◽  
B. S. Sathyaprakash
Keyword(s):  
Black Holes ◽  
Stellar Mass ◽  
Binary Black Holes
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