A5050571932- Pulsars and Gravitational Waves Research
- Cosmology and Gravitation Theories
- Astrophysical Phenomena and Observations
- Black Holes and Theoretical Physics
- Gamma-ray bursts and supernovae
- Relativity and Gravitational Theory
- High-pressure geophysics and materials
- Particle physics theoretical and experimental studies
- Noncommutative and Quantum Gravity Theories
- Space Technology and Applications
- Geophysics and Gravity Measurements
- Particle Accelerators and Free-Electron Lasers
- Geophysics and Sensor Technology
- Radio Astronomy Observations and Technology
- Robotics and Automated Systems
- Model Reduction and Neural Networks
- Advanced Frequency and Time Standards
- Experimental and Theoretical Physics Studies
Sun Yat-sen University
2018-2025
Huazhong University of Science and Technology
2017-2019
TianQin is a planned space-based gravitational wave (GW) observatory consisting of three earth orbiting satellites with an orbital radius about $10^5~{\rm km}$. The will form equilateral triangle constellation the plane which nearly perpendicular to ecliptic plane. aims detect GWs between $10^{-4}~{\rm Hz}$ and $1~{\rm that can be generated by wide variety important astrophysical cosmological sources, including inspiral Galactic ultra-compact binaries, stellar-mass black hole extreme mass...
We study the capability of space-based gravitational wave observatory TianQin to test no-hair theorem general relativity, using ringdown signal from coalescence massive black hole binaries. parametrize by four strongest quasinormal modes and estimate noise ratio for various source parameters. consider constraints both single detections all events combined throughout lifetime observatory, different astrophysical models. find that at end mission, will have constrained deviations frequency...
The gravitational wave memory effect is a prediction of general relativity. presence in signals not only provides the chance to test an important aspect relativity, but also represents potentially non-negligible contribution waveform for certain events. In this paper, we study prospect detecting directly with planned space-based detector -- TianQin. We find that during its 5 years operation, could be detected by TianQin, about $0.5\sim2.0$ may contain displacement signal-to-noise ratios...
Constituted with a massive black hole and stellar mass compact object, Extreme Mass Ratio Inspiral (EMRI) events hold unique opportunity for the study of holes, such as by measuring checking relations among mass, spin quadrupole moment hole, putting no-hair theorem to test. TianQin is planned space-based gravitational wave observatory EMRI one its main types sources. It important estimate capacity on testing EMRIs. In this work, we use analytic kludge waveform corrections how can be...
In this paper, we carry out a systematic study of the prospect testing general relativity with inspiral signals black hole binaries that could be detected TianQin. The is based on parameterized post-Einsteinian (ppE) waveform, so many modified gravity theories can covered simultaneously. We consider total masses ranging from $10\rm M_\odot\sim10^7 M_\odot$ and ppE corrections at post-Newtonian (PN) orders $-4$PN to $2$PN. Compared current ground-based detectors, TianQin improve constraints...
TianQin is a future space-based gravitational wave observatory targeting the frequency window of $10^{-4}$ Hz $\sim 1$ Hz. A large variety sources are expected in this band, including merger massive black hole binaries, inspiral extreme/intermediate mass ratio systems, stellar-mass Galactic compact and so on. will consist three Earth orbiting satellites on nearly identical orbits with orbital radii about $10^5$ km. The form normal triangle constellation whose plane perpendicular to ecliptic...
An explicit example is found showing how a modified theory of gravity can be constrained with the ringdown signals from merger binary black holes. This has been made possible by fact that gravitational considered in this work an exact rotating hole solution and corresponding quasinormal modes calculated. With these, we obtain constraint placed on parameter describing deviation particular alternative general relativity using detection holes's future space-based wave detectors.
In this paper, we revisit the problem of using gravitational wave data to test Einstein-dilation-Gauss-Bonnet theory by nine selected events from third Gravitational-Wave Transient Catalog. Compared with existing work, take into account higher harmonics more properly and also study contribution merger-ringdown data. Using inspiral alone, find that best result is GW200115, giving $\sqrt{|\ensuremath{\alpha}|}<1.1\text{ }\text{ }\mathrm{km}$, which about 17% tighter than previous result....
The memory effect in gravitational waves is a direct prediction of general relativity. presence the wave signals not only serves as test for relativity but also establishes connections between soft theorem, and asymptotic symmetries, serving bridge exploring fundamental physics. Furthermore, with ongoing progress space-based detection projects, generated by merger massive binary black hole binaries becoming increasingly significant cannot be ignored. In this work, we perform full Bayesian...
Abstract The direct detection of gravitational waves offers a powerful tool to explore the nature gravity and structure space-time. This paper focuses on capabilities space-based wave detectors in testing space-time non-commutativity. Our findings indicate that TianQin has potential impose constraints non-commutative scale at sub-Planckian level using massive black hole binaries. Additionally, we have developed pipeline tailored this specific topic.
Recently it has been shown that there is asymptotic BMS-like symmetry associated with the near-horizon geometry of black holes in three and four dimensions. In this paper, we show presence such a ubiquitous feature for generic For $D$ dimensions, contains 2 supertranslations $D\ensuremath{-}2$ generalized superrotations. The superrotations are found to generate Witt-like algebra was previously noticed rather different construction. case stationary axisymmetric holes, calculate surface...
The direct detection of gravitational waves offers a powerful tool to explore the nature gravity and structure space-time. This paper focuses on capabilities space-based wave detectors in testing space-time non-commutativity. Our findings indicate that TianQin has potential impose constraints non-commutative scale at sub-Planckian level using massive black hole binaries. Additionally, we have developed pipeline tailored this specific topic.
The memory effect in gravitational waves is a direct prediction of general relativity. presence the wave signals not only serves as test for relativity but also establishes connections between soft theorem, and asymptotic symmetries, serving bridge exploring fundamental physics. Furthermore, with ongoing progress space-based detection projects, generated by merger massive binary black hole binaries becoming increasingly significant cannot be ignored. In this work, we perform full Bayesian...
The detection of quasi-normal modes during the ringdown phase is a crucial method for testing no-hair theorem. In this paper, detectability and resolvability multiple using space-based gravitational wave detectors have been analyzed. results indicate that TianQin LISA potential to detect resolve series modes, including six fundamental one overtone, two nonlinear second-order modes. Furthermore, analysis systematic errors in waveform suggests even such as (3,3,1) (4,3,0), which are unlikely...
Space-based gravitational wave detectors have the capability to detect signals from very high redshifts. It is interesting know if such can be used study global structure of cosmic space. In this paper, we focus on one particular question: there exists a reflective boundary at redshift ($z>15$), it possible find it? We that, with current level technology: 1) waves appear only means which that signatures possibly detected; 2) large variety black holes, masses roughly in range $(10^3\sim 10^6)...
In this paper, we revisit the problem of using gravitational wave data to test Einstein-dilation-Gauss-Bonnet theory, by nine selected events from GWTC-3. Compared with existing work, are taking into account higher harmonics more properly and also study contribution merger-ringdown data. Using inspiral alone, find that best result is GW200115, giving $\sqrt{|\alpha|} < 1.1$ km, which about 17\% tighter than previous result. We notice possible existence a simple unexpected relation among...
Hidden conformal symmetries of scalar field on various black hole backgrounds have been investigated for years, but whether those features holds other fields are still open questions. Recently, with proper assumptions, Lunin achieves to the separation variables Maxwell equations Kerr background. In this paper, that equation, we find hidden symmetry appears at near region under low frequency limit. We also extended results vector Kerr-(A)dS and Kerr-NUT-(A)dS backgrounds, then if focusing near-horizon
The gravitational wave memory effect is a prediction of general relativity. presence in signals not only provides the chance to test an important aspect relativity, but also represents potentially non-negligible contribution waveform for certain events. In this paper, we study prospect detecting directly with planned space-based detector -- TianQin. We find that during its 5 years operation, could be detected by TianQin, about $0.5\sim2.0$ may contain displacement signal-to-noise ratios...
In this paper, we carry out a systematic study of the prospect testing general relativity with inspiral signals black hole binaries that could be detected TianQin. The is based on parameterized post-Einsteinian (ppE) waveform, so many modified gravity theories can covered simultaneously. We consider total masses ranging from $10\rm M_\odot\sim10^7 M_\odot$ and ppE corrections at post-Newtonian (PN) orders $-4$PN to $2$PN. Compared current ground-based detectors, TianQin improve constraints...