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The gravitational waves (GWs) from a binary black hole (BBH) with masses between 10^4 and 10^7 Msun can be detected with the Laser Interferometer Space Antenna (LISA) once their orbital frequency exceeds 10^-4 - 10^-5 Hz. The binary…

High Energy Astrophysical Phenomena · Physics 2017-07-19 Zoltán Haiman

The planned Laser Interferometer Space Antenna (LISA) is expected to detect the inspiral and merger of massive black hole binaries (MBHBs) at z <~ 5 with signal-to-noise ratios (SNRs) of hundreds to thousands. Because of these high SNRs,…

General Relativity and Quantum Cosmology · Physics 2008-11-26 Curt Cutler , Michele Vallisneri

Accreting supermassive black hole binaries are powerful multimessenger sources emitting both gravitational and EM radiation. Understanding the accretion dynamics of these systems and predicting their distinctive EM signals is crucial to…

Massive black hole binaries (MBHBs) form as a consequence of galaxy mergers. However, it is still unclear whether they typically merge within a Hubble time, and how accretion may affect their evolution. These questions will be addressed by…

Astrophysics of Galaxies · Physics 2020-08-19 Magdalena S. Siwek , Luke Zoltan Kelley , Lars Hernquist

Stellar-mass black hole binaries (BHBs) near supermassive black holes (SMBH) in galactic nuclei undergo eccentricity oscillations due to gravitational perturbations from the SMBH. Previous works have shown that this channel can contribute…

High Energy Astrophysical Phenomena · Physics 2019-04-25 Bao-Minh Hoang , Smadar Naoz , Bence Kocsis , Will Farr , Jess McIver

Future space-based gravitational wave (GW) observatories such as LISA will detect massive black hole binaries (MBHBs), which are expected to be accompanied by electromagnetic counterparts, thereby providing bright standard sirens for…

Instrumentation and Methods for Astrophysics · Physics 2026-03-06 Jia-Hao Zhong , Jin-Zhao Yang , Tao Yang , Xu-Heng Ding , Xi-Long Fan , Kai Liao , Bei You

Many scenarios have been proposed for the origin of the supermassive black holes (SMBHs) that are found in the centres of most galaxies. Many of these formation scenarios predict a high-redshift population of intermediate-mass black holes…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-13 Joseph E. Plowman , Daniel C. Jacobs , Ronald W. Hellings , Shane L. Larson , Sachiko Tsuruta

We use the ASTRID cosmological simulation to forecast massive black hole (MBH) mergers detectable by Laser Interferometer Space Antenna (LISA) down to $z=0$. ASTRID directly models MBH dynamical friction, allowing a realistic tracking of…

Astrophysics of Galaxies · Physics 2025-11-11 Bonny Y. Wang , Yihao Zhou , William Chen , Nianyi Chen , Tiziana Di Matteo , Rupert Croft , Simeon Bird , Yueying Ni

The coalescence of massive black hole (BH) binaries due to galaxy mergers provides a primary source of low-frequency gravitational radiation detectable by pulsar timing measurements and by the proposed LISA (Laser Interferometry Space…

Astrophysics · Physics 2009-11-07 J. Stuart B. Wyithe , Abraham Loeb

It is known that massive black holes (MBHs) of $10^{5-7}\,M_\odot$ could capture small compact objects to form extreme-mass-ratio inspirals (EMRIs). Such systems emit gravitational waves (GWs) in the band of the Laser Interferometer Space…

General Relativity and Quantum Cosmology · Physics 2019-03-29 Wen-Biao Han , Xian Chen

Gravitational waves (GWs) offer an unprecedented opportunity to survey the sky and detect mergers of compact objects. While intermediate-mass black holes (IMBHs) have not been detected beyond any reasonable doubt with either dynamical or…

High Energy Astrophysical Phenomena · Physics 2022-11-16 Giacomo Fragione

For space-based gravitational wave (GW) detection, the main noise source for massive black hole binaries (MBHBs) is attributed to approximately $10^7$ double white dwarf binaries in the foreground. For a GW source, the amplitude of the…

High Energy Astrophysical Phenomena · Physics 2024-09-27 Pan Guo , Hong-Bo Jin , Cong-Feng Qiao , Yue-Liang Wu

Massive stellar origin black hole binaries (SBHBs), originating from stars above the pair-instability mass gap, are primary candidates for multiband gravitational wave (GW) observations. Here we study the possibility to use them as…

Cosmology and Nongalactic Astrophysics · Physics 2022-02-16 Niccolò Muttoni , Alberto Mangiagli , Alberto Sesana , Danny Laghi , Walter Del Pozzo , David Izquierdo-Villalba , Mattia Rosati

The laser-interferometer space antenna (LISA) will be launched in the mid 2030s. It promises to observe the coalescence of massive black-hole (BH) binaries with signal-to-noise ratios (SNRs) reaching thousands. Crucially, it will detect…

General Relativity and Quantum Cosmology · Physics 2024-11-20 Alexandre Toubiana , Lorenzo Pompili , Alessandra Buonanno , Jonathan R. Gair , Michael L. Katz

We study the evolution and gravitational wave emission of white dwarf -- black hole accreting binaries with a semi-analytical model. These systems will evolve across the mHz gravitational wave frequency band and potentially be detected by…

Solar and Stellar Astrophysics · Physics 2021-03-15 Laura Sberna , Alexandre Toubiana , M. Coleman Miller

Coalescing massive black hole binaries (MBHBs) of $10^{4-7} \rm M_{\odot}$, forming in the aftermath of galaxy mergers, are primary targets of the space mission LISA, the {\it Laser Interferometer Space Antenna}. An assessment of LISA…

Astrophysics of Galaxies · Physics 2019-05-21 Matteo Bonetti , Alberto Sesana , Francesco Haardt , Enrico Barausse , Monica Colpi

Massive black hole binaries are expected to provide the strongest gravitational wave signals for the Laser Interferometer Space Antenna (LISA), a space mission targeting $\sim\,$mHz frequencies. As a result of the technological challenges…

General Relativity and Quantum Cosmology · Physics 2021-08-18 Kallol Dey , Nikolaos Karnesis , Alexandre Toubiana , Enrico Barausse , Natalia Korsakova , Quentin Baghi , Soumen Basak

The population of unresolved stellar-mass black hole binaries (sBBHs) is expected to produce a stochastic gravitational-wave background (SGWB) potentially detectable by the Laser Interferometer Space Antenna (LISA). In this work, we compute…

General Relativity and Quantum Cosmology · Physics 2025-10-28 Ran Chen , Rohit S. Chandramouli , Federico Pozzoli , Riccardo Buscicchio , Enrico Barausse

We outline the eccentricity evolution of sub-parsec massive black hole binaries (MBHBs) forming in galaxy mergers. In both stellar and gaseous environments, MBHBs are expected to grow large orbital eccentricities before they enter the…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-03 Constanze Roedig , Alberto Sesana

One of the scientific objectives of the Laser Interferometer Space Antenna (LISA) is to probe the expansion of the Universe using gravitational wave observations. Indeed, as gravitational waves from the coalescence of a massive black hole…

Cosmology and Nongalactic Astrophysics · Physics 2024-07-17 Alberto Mangiagli , Chiara Caprini , Sylvain Marsat , Lorenzo Speri , Robert R. Caldwell , Nicola Tamanini