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The gravitational wave (GW) antenna LISA will detect the signal from coalescing massive black hole binaries (MBHBs) of $\rm 10^4\,{-}\,10^7\, M_{\odot}$, providing clues on their formation and growth along cosmic history. Some of these…

Astrophysics of Galaxies · Physics 2023-09-20 David Izquierdo-Villalba , Monica Colpi , Marta Volonteri , Daniele Spinoso , Silvia Bonoli , Alberto Sesana

With its capacity to observe $\sim 10^{5-6}$ faint active galactic nuclei (AGN) out to redshift $z\approx 6$, Roman is poised to reveal a population of $10^{4-6}\, {\rm M_\odot}$ black holes during an epoch of vigorous galaxy assembly. By…

Captures of stellar-mass compact objects (COs) by massive ($\sim 10^6 M_\odot$) black holes (MBHs) are potentially an important source for LISA, the proposed space-based gravitational-wave (GW) detector. The orbits of the inspiraling COs…

General Relativity and Quantum Cosmology · Physics 2009-11-10 Leor Barack , Curt Cutler

We explore the formation of double-compact-object binaries in Milky Way (MW) globular clusters (GCs) that may be detectable by the Laser Interferometer Space Antenna (LISA). We use a set of 137 fully evolved GC models that, overall,…

High Energy Astrophysical Phenomena · Physics 2018-05-31 Kyle Kremer , Sourav Chatterjee , Katelyn Breivik , Carl L. Rodriguez , Shane L. Larson , Frederic A. Rasio

The Laser Interferometer Space Antenna (LISA) will detect gravitational waves from the population of merging massive black holes binaries (MBHBs) throughout the Universe. The LISA data stream will feature many superposed signals from…

General Relativity and Quantum Cosmology · Physics 2025-07-02 Senwen Deng , Stanislav Babak , Sylvain Marsat

We investigate the intrinsic and observational properties of $z\gtrsim 6$ galaxies hosting coalescing massive black holes (MBHs) that gives rise to gravitational waves (GWs) detectable with the Laser Interferometer Space Antenna (LISA). We…

Massive black hole binaries (MBHBs) produce gravitational waves (GWs) that are detectable with pulsar timing arrays. We determine the properties of the host galaxies of simulated MBHBs at the time they are producing detectable GW signals.…

Astrophysics of Galaxies · Physics 2025-01-28 Katharine Cella , Stephen R. Taylor , Luke Zoltan Kelley

We study the angular resolution of the gravitational wave detector LISA and show that numerical relativity can drastically improve the accuracy of position location for coalescing Super Massive Black Hole (SMBH) binaries. For systems with…

General Relativity and Quantum Cosmology · Physics 2008-06-15 Stanislav Babak , Mark Hannam , Sascha Husa , Bernard Schutz

The launch of space based gravitational wave (GW) detectors (e.g. Laser Interferometry Space Antenna; LISA) and current and upcoming Pulsar Timing Arrays (PTAs) will extend the GW window to low frequencies, opening new investigations into…

High Energy Astrophysical Phenomena · Physics 2022-04-20 Samuel Banks , Katharine Lee , Nazanin Azimi , Kendall Scarborough , Nikolai Stefanov , Indra Periwal , Colin DeGraf , Tiziana Di Matteo

Binary black holes (BBH) are expected to form and merge in active galactic nuclei (AGN), deep in the potential well of a supermassive black hole (SMBH), from populations that exist in a nuclear star cluster (NSC). Here we investigate the…

High Energy Astrophysical Phenomena · Physics 2025-09-19 Jake Postiglione , K. E. Saavik Ford , Henry Best , Barry McKernan , Matthew O'Dowd

The coalescence history of massive black holes has been derived from cosmological simulations, in which the evolution of those objects and that of the host galaxies are followed in a consistent way. The present study indicates that…

Cosmology and Nongalactic Astrophysics · Physics 2011-12-07 Ch. Filloux , J. A. de Freitas Pacheco , F. Durier , J. C. N. de Araujo

Extreme mass ratio inspirals (EMRIs) take place when a stellar-mass black hole (BH) merges with a supermassive black hole (SMBH). The gravitational wave emission from such an event is expected to be detectable by the future Laser…

High Energy Astrophysical Phenomena · Physics 2023-09-20 Smadar Naoz , Zoltan Haiman

The Vera C. Rubin Observatory has now seen first light, and over a 10 year duration, LSST is projected to catalogue tens of millions of quasars, many of which are expected to be associated with sub-parsec supermassive black hole binaries…

High Energy Astrophysical Phenomena · Physics 2025-12-10 Kevin Park , Zoltan Haiman , Chengcheng Xin , Tzuken Shen , Ashley Villar , Jordy Davelaar

The Laser Interferometer Space Antenna (LISA) will produce a data stream containing a vast number of overlapping sources: from strong signals generated by the coalescence of massive black hole binary systems to much weaker radiation form…

General Relativity and Quantum Cosmology · Physics 2009-11-11 E. D. L. Wickham , A. Stroeer , A. Vecchio

Some electromagnetically observed ultra-compact binaries will be strong gravitational wave sources for space-based detectors like the Laser Interferometer Space Antenna (LISA). These sources have historically been referred to as…

High Energy Astrophysical Phenomena · Physics 2024-04-05 Tyson B. Littenberg , Ananthu K. Lali

Massive black holes (MBHs) exist in the Galactic center (GC) and other nearby galactic nuclei. As natural outcome of galaxy mergers, some MBHs may have a black hole (BH) companion. In this paper, assuming that the MBHs in the GC and some…

High Energy Astrophysical Phenomena · Physics 2024-11-22 Xiao Guo , Qingjuan Yu , Youjun Lu

White dwarf binaries are the most common compact binaries in the Universe and are especially important for low-frequency gravitational wave detectors such as LISA. There are a number of open questions about binary evolution and the Galactic…

Astrophysics · Physics 2008-11-26 G. Nelemans

We introduce a new technique to search for gravitational wave events from compact binary mergers that produce a clear signal only in a single gravitational wave detector, and marginal signals in other detectors. Such a situation can arise…

High Energy Astrophysical Phenomena · Physics 2021-09-22 Barak Zackay , Liang Dai , Tejaswi Venumadhav , Javier Roulet , Matias Zaldarriaga

We use population synthesis modelling to predict the gravitational wave (GW) signal that the Laser Interferometer Space Antenna (LISA) will detect from the Galactic population of compact binary systems. We implement a realistic star…

High Energy Astrophysical Phenomena · Physics 2026-02-13 Jake McMillan , Adam Ingram , Cordelia Dashwood Brown , Andrei Igoshev , Matthew Middleton , Grzegorz Wiktorowicz , Simone Scaringi

Most of compact binary systems are expected to circularize before the frequency of emitted gravitational waves (GWs) enters the sensitivity band of the ground based interferometric detectors. However, several mechanisms have been proposed…