Seismic Background Limitation of Lunar Gravitational-Wave Detectors

Jan Harms
Phys. Rev. Lett. 129, 071102 – Published 12 August 2022

Abstract

New concepts were recently proposed for gravitational-wave (GW) detectors on the Moon. These include laser-interferometric detectors, proposed as free-range or optical-fiber interferometers, and inertial acceleration sensors. Some of them exploit the response of the Moon to GWs, others follow the design of current laser-interferometric GW detectors, which directly measure the gravitational strain with suspended optics. All of these ideas emerged since the Moon offers an extremely quiet geophysical environment compared to Earth, but at the same time, one must realize that even the quiet lunar environment sets limits to the sensitivity of lunar GW detectors. In this Letter, we compare the proposed mission concepts in terms of their response to GWs and evaluate how they are affected by the lunar seismic background. We discuss available mitigation strategies. From these analyses, we infer the prime observation band of each detector concept.

  • Figure
  • Received 15 May 2022
  • Accepted 27 July 2022

DOI:https://doi.org/10.1103/PhysRevLett.129.071102

© 2022 American Physical Society

Physics Subject Headings (PhySH)

Gravitation, Cosmology & AstrophysicsInterdisciplinary Physics

Authors & Affiliations

Jan Harms*

  • Gran Sasso Science Institute (GSSI), I-67100 L’Aquila, Italy and INFN, Laboratori Nazionali del Gran Sasso, I-67100 Assergi, Italy

  • *jan.harms@gssi.it

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Vol. 129, Iss. 7 — 12 August 2022

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