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The Laser Interferometer Space Antenna (LISA) is designed to detect a variety of gravitational-wave events, including mergers of massive black hole binaries, stellar-mass black hole inspirals, and extreme mass-ratio inspirals. LISA's…

General Relativity and Quantum Cosmology · Physics 2025-03-28 Aasim Jan , Richard O'Shaughnessy , Deirdre Shoemaker , Jacob Lange

Coalescing, massive black-hole (MBH) binaries are the most powerful sources of gravitational waves (GWs) in the Universe, which makes MBH science a prime focus for ongoing and upcoming GW observatories. The Laser Interferometer Space…

The coalescence of massive black hole binaries (with masses $10^4 - 10^7 M_{\odot}$) leads to gravitational wave emission that is detectable out to high redshifts ($z \sim 20$) with the forthcoming LISA observatory. We combine the…

Cosmology and Nongalactic Astrophysics · Physics 2020-12-09 Hamsa Padmanabhan , Abraham Loeb

With the launch of the Laser Interferometer Space Antenna (LISA), we will be able to estimate the sky position, luminosity distance (d$_{L}$), chirp mass, and mass ratio for detected merging massive black hole binary (MBHB) systems. LISA's…

In the 2030s, a new era of gravitational-wave (GW) observations will dawn as multiple space-based GW detectors, such as the Laser Interferometer Space Antenna, Taiji and TianQin, open the millihertz window for GW astronomy. These detectors…

Instrumentation and Methods for Astrophysics · Physics 2023-09-07 Wen-Hong Ruan , He Wang , Chang Liu , Zong-Kuan Guo

Newtonian and post-Newtonian (PN) calculations indicate that the phenomenology of eccentric binary black hole (BBH) merger waveforms is significantly more complex than that of their quasi-circular counterparts. Each spherical harmonic mode…

Third-generation (3G) gravitational wave detectors, in particular Einstein Telescope (ET) and Cosmic Explorer (CE), will explore unprecedented cosmic volumes in search for compact binary mergers, providing us with tens of thousands of…

Cosmology and Nongalactic Astrophysics · Physics 2023-09-06 Niccolò Muttoni , Danny Laghi , Nicola Tamanini , Sylvain Marsat , David Izquierdo-Villalba

With the release of the Gravitational-Wave Transient Catalog GWTC-4.0 by the LIGO-Virgo-KAGRA (LVK) collaboration, 218 candidate detections of gravitational waves (GWs) from compact binary coalescences (CBCs) have been reported. This…

Cosmology and Nongalactic Astrophysics · Physics 2026-01-07 Grégoire Pierra , Alexander Papadopoulos

We analyze the parameter estimation accuracy that can be achieved for the mass and spin of SgrA$^\ast$, the SMBH in our Galactic Center, by detecting multiple extremely large mass-ratio inspirals (XMRIs). XMRIs are formed by brown dwarfs…

High Energy Astrophysical Phenomena · Physics 2025-06-10 Verónica Vázquez-Aceves , Yiren Lin , Alejandro Torres-Orjuela

It is generally believed that the angular resolution of the Laser Interferometer Space Antenna (LISA) for binary supermassive black holes (SMBH) will not be good enough to identify the host galaxy or galaxy cluster. This conclusion, based…

Recent studies have revealed the contribution of extragalactic DWD to the astrophysical SGWB could be detectable in the mHz regime by LISA. Conversely, the presence of this SGWB could hamper the detection of cosmological SGWB, which are one…

General Relativity and Quantum Cosmology · Physics 2025-11-05 Guillaume Boileau , Tristan Bruel , Alexandre Toubiana , Astrid Lamberts , Nelson Christensen

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

The gravitational wave (GW) as a standard siren directly determines the luminosity distance from the gravitational waveform without reference to the specific cosmological model, of which the redshift can be obtained separately by means of…

Cosmology and Nongalactic Astrophysics · Physics 2018-05-09 Rong-Gen Cai , Tong-Bo Liu , Xue-Wen Liu , Shao-Jiang Wang , Tao Yang

Gravitational wave (GW) detections of binary black holes (BBHs) have shown evidence for a dearth of component black holes with masses above $\sim50M_\odot$. This is consistent with expectations of a mass gap due to the existence of…

High Energy Astrophysical Phenomena · Physics 2021-03-16 Jose María Ezquiaga , Daniel E. Holz

Gravitational waves detected by advanced ground-based detectors have allowed studying the universe in a way which is fully complementary to electromagnetic observations. As more sources are detected, it will be possible to measure…

General Relativity and Quantum Cosmology · Physics 2018-07-25 Salvatore Vitale , Chris Whittle

We show that nearly half of all binary black hole (BBH) mergers dynamically assembled in globular clusters have measurable eccentricities ($e>0.01$) in the LISA band ($10^{-2}$ Hz), when General Relativistic corrections are properly…

High Energy Astrophysical Phenomena · Physics 2018-09-05 Johan Samsing , Daniel J. D'Orazio

We have analyzed LVK gravitational wave events that show some evidence of eccentricity from TEOBResumS modeling parameter estimations and have confronted them independently with full numerical generated waveforms from our bank of nearly two…

General Relativity and Quantum Cosmology · Physics 2026-05-04 Patricia McMillin , Katelyn J. Wagner , Giuseppe Ficarra , Carlos O. Lousto , Richard O'Shaughnessy

Observation of gravitational waves (GWs) in two different frequency bands is referred to as multiband GW astronomy. With the planned Laser Interferometric Space Antenna (LISA) operating in the $10^{-4}-0.1$ Hz range, and third generation…

General Relativity and Quantum Cosmology · Physics 2021-03-17 Sayantani Datta , Anuradha Gupta , Shilpa Kastha , K. G. Arun , B. S. Sathyaprakash

Gravitational wave spectral sirens can provide cosmological constraints by using the shape of the binary black hole (BBH) mass distribution (MD). However, the precision and accuracy of these constraints depends critically on the capturing…

Cosmology and Nongalactic Astrophysics · Physics 2026-05-13 Matteo Tagliazucchi , Michele Moresco , Nicola Borghi , Chiara Ciapetti

The recent evidence of a stochastic background of gravitational waves in the nHz band by pulsar-timing array (PTA) experiments has shed new light on the formation and evolution of massive black hole binaries with masses $\sim 10^8$--$10^9…

Astrophysics of Galaxies · Physics 2023-11-27 Enrico Barausse , Kallol Dey , Marco Crisostomi , Akshay Panayada , Sylvain Marsat , Soumen Basak
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