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Extreme mass-ratio inspirals (EMRIs), comprising a stellar-mass compact object (CO) orbiting a supermassive black hole (BH), are key targets for future space-based gravitational-wave (GW) observatories. Incorporating the spin of the…

High Energy Astrophysical Phenomena · Physics 2026-03-26 Qiuxin Cui , Wen-Biao Han

A binary extreme-mass-ratio inspiral (b-EMRI) is a hierarchical triple system consisting of a stellar-mass binary black hole (BBH) orbiting a central Kerr supermassive black hole (SMBH). Although predicted by several astrophysical models,…

General Relativity and Quantum Cosmology · Physics 2025-05-06 Yucheng Yin , Josh Mathews , Alvin J. K. Chua , Xian Chen

Extreme-mass-ratio inspirals (EMRIs) are important sources for space-borne gravitational-wave (GW) detectors. Such a source normally consists of a stellar-mass black hole (BH) and a Kerr supermassive BH (SMBH), but recent astrophysical…

High Energy Astrophysical Phenomena · Physics 2022-12-14 Xian Chen , Zhongfu Zhang

The low-energy effective action of String Theory introduces corrections to the dilaton-graviton sector, resulting in deformed black holes beyond general relativity. We analyze extreme mass-ratio inspiral systems (EMRIs), where a…

General Relativity and Quantum Cosmology · Physics 2024-08-29 Chao Zhang , Guoyang Fu , Yungui Gong

In this work, we numerically explore the dynamics of a point mass (e.g., a stellar-mass black hole) moving within a thin accretion disk of a massive object (i.e., a supermassive black hole) with three dimensional hydrodynamical simulations…

High Energy Astrophysical Phenomena · Physics 2025-03-10 Ya-Ping Li , Huan Yang , Zhen Pan

Extreme Mass Ratio Inspirals (EMRIs) are one of the key sources for future space-based gravitational wave interferometers. Measurements of EMRI gravitational waves are expected to determine the characteristics of their sources with…

Extreme-mass-ratio-inspiral (EMRI) is one of the most important sources for the future space-borne gravitational wave detectors. In such kind of systems, the compact objects usually orbit around the central supermassive black holes with…

General Relativity and Quantum Cosmology · Physics 2021-08-11 Chen Zhang , Wen-Biao Han , Shu-Cheng Yang

The merger of supermassive black holes (SMBHs) produces mHz gravitational waves (GW), which are potentially detectable by future Laser Interferometer Space Antenna (LISA). Such binary systems are usually embedded in an accretion disk…

High Energy Astrophysical Phenomena · Physics 2024-07-17 Fatemeh Hossein Nouri , Agnieszka Janiuk

Extreme-Mass-Ratio Inspirals (EMRIs) are one of the main sources of gravitational waves expected in the low-frequency band, where space-based detectors like Laser Interferometer Space Antenna (LISA) will operate. The large number of…

General Relativity and Quantum Cosmology · Physics 2026-04-10 Pablo F. Muguruza , Carlos F. Sopuerta

The gravitational capture of a stellar-mass object by a supermassive black hole represents a unique probe of warped spacetime. The small object, typically a stellar-mass black hole, describes a very large number of cycles before crossing…

Cosmology and Nongalactic Astrophysics · Physics 2024-07-08 Pau Amaro Seoane , Yiren Lin , Kostas Tzanavaris

Gravitational wave (GW) detector LISA will observe near-coalescence extreme mass ratio inspirals (EMRIs), which typically form in galactic central accretion disks. Gas torques on EMRI will alter its GW-driven inspiral trajectory from the…

Astrophysics of Galaxies · Physics 2026-04-24 Mudit Garg , Lucio Mayer , Yinhao Wu , Yacine Ali-Haïmoud , Douglas N. C. Lin

We show that the loudest extreme mass-ratio inspirals (EMRIs) detected by the future space-based gravitational wave detector LISA can be used as dark standard sirens, statistically matching their sky localisation region with mock galaxy…

Cosmology and Nongalactic Astrophysics · Physics 2021-09-30 Danny Laghi

Systems consisting of a massive black hole and a stellar-origin compact object (CO), known as extreme-mass-ratio inspirals (EMRIs), are of great significance for space-based gravitational-wave detectors, as they will allow for testing…

High Energy Astrophysical Phenomena · Physics 2020-10-06 Hui-Min Fan , Yi-Ming Hu , Enrico Barausse , Alberto Sesana , Jian-dong Zhang , Xuefeng Zhang , Tie-Guang Zi , Jianwei Mei

We extend the work of Ryan on mapping the spacetime of the central object of an extreme mass-ratio inspiral (EMRI) by using gravitational waves (GWs) emitted by the system, which may be observed in future missions such as LISA. Whether the…

General Relativity and Quantum Cosmology · Physics 2021-02-12 Sayak Datta , Sukanta Bose

Black holes are superb sources of gravitational wave signals, for example when they are born in stellar collapse. We explore the subtleties that may emerge if mass accretion events increase significantly the mass of the black hole during…

General Relativity and Quantum Cosmology · Physics 2009-10-31 Philippos Papadopoulos , Jose A. Font

Extreme mass-ratio inspirals (EMRIs), in which a solar mass compact object is whirling around a supermassive black hole, act as precise tracers of the spacetime geometry and astrophysical environment around the supermassive black hole.…

General Relativity and Quantum Cosmology · Physics 2026-03-05 Mostafizur Rahman , Takuya Takahashi

Compact remnants on orbits with peri-apses close to the Schwarzschild radius of a massive black hole (MBH) lose orbital energy by emitting gravitational waves (GWs) and spiral in. Scattering with other stars allows successful inspiral of…

Astrophysics · Physics 2009-11-11 Clovis Hopman

[abridged] The detection of gravitational waves from extreme-mass-ratio (EMRI) binaries, comprising a stellar-mass compact object orbiting around a massive black hole, is one of the main targets for low-frequency gravitational-wave…

General Relativity and Quantum Cosmology · Physics 2012-08-09 Priscilla Canizares , Jonathan R. Gair , Carlos F. Sopuerta

Extreme-mass-ratio inspirals (EMRIs), stellar-mass compact objects (SCOs) inspiralling into a massive black hole, are one of the main sources of gravitational waves expected for the Laser Interferometer Space Antenna (LISA). To extract the…

General Relativity and Quantum Cosmology · Physics 2015-05-13 Priscilla Canizares , Carlos F. Sopuerta

Extreme mass-ratio inspirals (EMRIs), consisting of a secondary (stellar mass) black hole (BH) orbiting around a supermassive BH, are one of the primary targets for future spaceborne gravitational wave (GW) detectors. The spin of the…

High Energy Astrophysical Phenomena · Physics 2025-05-23 Qiuxin Cui , Wen-Biao Han , Zhen Pan
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