Gravitational wave backgrounds from colliding exotic compact objects

Banks, Hannah; Grabowska, Dorota M.; McCullough, Matthew

doi:10.1103/physrevd.108.035017

Title: Gravitational wave backgrounds from colliding exotic compact objects

Journal Article · 14 August 2023 · Physical Review. D.

DOI: https://doi.org/10.1103/physrevd.108.035017 · OSTI ID:1995033

^[1];

^[2]; McCullough, Matthew ^[3]

Univ. of Cambridge (United Kingdom); European Organization for Nuclear Research (CERN), Geneva (Switzerland)
Univ. of Washington, Seattle, WA (United States); European Organization for Nuclear Research (CERN), Geneva (Switzerland)
European Organization for Nuclear Research (CERN), Geneva (Switzerland)

Long-baseline atom interferometers offer an exciting opportunity to explore midband gravitational waves with frequencies of 1 mHz–10 Hz. In this work we survey the landscape of possible contributions to the total gravitational wave background from merging binary systems in this frequency band and advocate for targeting this observable. Such an approach is complimentary to searches for resolved mergers from individual sources and may have much to reveal about the Universe. We highlight that the inspiral phases of known stellar-mass compact binaries cumulatively produce a signal well within reach of the proposed AION-km and AEDGE experiments which will need to be accounted for in the gravitational wave programs of these experiments. We further show that hypothetical populations of dark sector exotic compact objects, harboring just a tiny fraction of the dark energy density, could generate signatures unique to gravitational wave detectors sensitive to subhertz frequencies, providing a novel means to probe complexity in the dark sector.

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Research Organization:: Univ. of Washington, Seattle, WA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP)

Grant/Contract Number:: SC0020970; FG02-97ER41014; FG02-97ER-41014

OSTI ID:: 1995033

Alternate ID(s):: OSTI ID: 2259233

Report Number(s):: CERN-TH-2023-016; IQuS@UW-21-044; DE-FG02-97ER-41014; ST/P000681/1; ST/T000694/1; TRN: US2407729

Journal Information:: Physical Review. D., Vol. 108, Issue 3; ISSN 2470-0010

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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