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Related papers: Mass-gap extreme mass ratio inspirals

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Extreme mass ratio inspirals (EMRIs) are compact binary systems characterized by a mass-ratio $q=m/M$ in the range $~10^{-9}-10^{-4}$ and represent primary gravitational wave (GW) sources for the forthcoming Laser Interferometer Space…

Extreme Mass Ratio Inspirals (EMRIs) can be classified as dry EMRIs and wet EMRIs based on their formation mechanisms. Dry (or the "loss-cone") EMRIs, previously considered as the main EMRI sources for the Laser Interferometer Space…

High Energy Astrophysical Phenomena · Physics 2021-09-08 Zhen Pan , Zhenwei Lyu , Huan Yang

Extreme mass ratio inspirals (EMRIs) occur when stellar-mass compact objects begin a gravitational wave (GW) driven inspiral into massive black holes. EMRI waveforms can precisely map the surrounding spacetime, making them a key target for…

Astrophysics of Galaxies · Physics 2023-04-27 Ismail Qunbar , Nicholas C. Stone

Extreme Mass Ratio Inspirals (EMRIs) are important sources for space-borne gravitational wave detectors, such as LISA (Laser Interferometer Space Antenna) and TianQin. Previous EMRI rate studies have focused on the "loss cone" scenario,…

High Energy Astrophysical Phenomena · Physics 2021-06-16 Zhen Pan , Huan Yang

Extreme-mass ratio inspirals (EMRIs) of stellar-mass black holes (BHs) are among the main targets for upcoming low-frequency gravitational wave (GW) detectors such as the Laser Interferometer Space Antenna (LISA). In the classical scenario,…

High Energy Astrophysical Phenomena · Physics 2024-09-18 Karamveer Kaur , Hagai Perets

Supermassive black holes and their surrounding dense stellar environments nourish a variety of astrophysical phenomena. We focus on the distribution of stellar-mass black holes around the supermassive black hole and the consequent formation…

Astrophysics of Galaxies · Physics 2024-12-11 Barak Rom , Itai Linial , Karamveer Kaur , Re'em Sari

Wet extreme mass-ratio inspirals (wet EMRIs), which arise from stellar-mass black holes inspiral into supermassive black holes (SMBHs) within the gas-rich environments of Active Galactic Nuclei (AGN), are primary sources of gravitational…

High Energy Astrophysical Phenomena · Physics 2026-02-05 Zhenwei Lyu , Zhen Pan , Junjie Mao , Ning Jiang , Huan Yang

Close encounters between two initially unbound objects can result in a binary system if enough energy is released as gravitational waves (GWs). We address the scenario in which such encounters occur in merging elliptical galaxies. There is…

Astrophysics of Galaxies · Physics 2022-11-30 Verónica Vázquez-Aceves , Pau Amaro Seoane , Dana Kuvatova , Maxim Makukov , Chingis Omarov , Denis Yurin

Extreme mass-ratio inspirals (EMRIs) are long-duration gravitational-wave sources in which a compact object gradually spirals into a massive black hole. Their formation is governed by the interplay between stochastic angular-momentum…

General Relativity and Quantum Cosmology · Physics 2026-03-11 Chen Feng , Yong Tang

Compact stellar objects inspiralling into massive black holes (MBHs) in galactic nuclei are some of the most promising gravitational wave (GWs) sources for next generation GW-detectors. The rates of such extreme mass ratio inspirals (EMRIs)…

Astrophysics of Galaxies · Physics 2016-10-12 Danor Aharon , Hagai B. Perets

The gravitational-wave (GW) inspirals of stellar-mass compact objects onto a supermassive black hole (MBH), are some of the most promising GW sources detectable by next-generation space-born GW-detectors. The rates and characteristics of…

Astrophysics of Galaxies · Physics 2021-01-05 Yael Raveh , Hagai B. Perets

We present realistic eccentricity distributions for extreme mass ratio inspirals (EMRIs) forming via the two-body relaxation channel in nuclear star clusters, tracking their evolution up to the final plunge onto the central Schwarzschild…

High Energy Astrophysical Phenomena · Physics 2026-03-02 Davide Mancieri , Luca Broggi , Morgan Vinciguerra , Alberto Sesana , Matteo Bonetti

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

Using an analytic, static, and spherically symmetric metric for a Schwarzschild black hole immersed in a dark matter (DM) halo with the Hernquist-type profile, we derive analytic expressions for the orbital period and precession of…

General Relativity and Quantum Cosmology · Physics 2024-11-01 Ning Dai , Yungui Gong , Yang Zhao , Tong Jiang

Extreme mass ratio inspirals (EMRIs) are anticipated to be primary gravitational wave sources for LISA (Laser Interferometer Space Antenna). They form in dense nuclear clusters when a compact object (CO) is captured by the central massive…

High Energy Astrophysical Phenomena · Physics 2025-03-04 Davide Mancieri , Luca Broggi , Matteo Bonetti , Alberto Sesana

The extreme mass ratio inspiral (EMRI), defined as a stellar-mass compact object inspiraling into a supermassive black hole (SMBH), has been widely argued to be a low-frequency gravitational wave (GW) source. EMRIs providing accurate…

High Energy Astrophysical Phenomena · Physics 2020-01-08 Y. Y. Wang , F. Y. Wang , Y. C. Zou , Z. G. Dai

The coalescence of stellar-mass primordial black holes (PBHs) might explain some of the gravitation waves (GWs) events detected by LIGO-Virgo-KAGRA. On the other hand, observational hints for supermassive PBHs (SMPBHs) have been…

Cosmology and Nongalactic Astrophysics · Physics 2024-03-21 Hai-Long Huang , Tian-Yi Song , Yun-Song Piao

Extreme-mass-ratio inspirals (EMRIs), consisting of a massive black hole and a stellar compact object, are one of the most important sources for space-borne gravitational wave detectors like TianQin. Their population study can be used to…

High Energy Astrophysical Phenomena · Physics 2025-05-08 Hui-Min Fan , Xiang-Yu Lyu , Jian-dong Zhang , Yi-Ming Hu , Rong-Jia Yang , Tai-Fu Feng

Extreme-mass-ratio inspiral (EMRI) is an important gravitational-wave (GW) source and it normally consists of one stellar-mass black hole (BH) whirling closely around a supermassive black hole (SMBH). In this Letter, we demonstrate that the…

High Energy Astrophysical Phenomena · Physics 2018-10-02 Xian Chen , Wen-Biao Han

Inspirals of stellar-mass compact objects into massive black holes, known as extreme mass ratio inspirals (EMRIs), are one of the key targets for upcoming space-based gravitational-wave detectors. In this paper we take the first steps…

General Relativity and Quantum Cosmology · Physics 2023-08-01 Lukáš Polcar , Georgios Lukes-Gerakopoulos , Vojtěch Witzany
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