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Detecting fundamental fields with LISA observations of gravitational waves from extreme mass-ratio inspirals

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arxiv 2106.11325 v3 pith:CG3OIVVL submitted 2021-06-21 gr-qc astro-ph.HEhep-th

Andrea Maselli , Nicola Franchini , Leonardo Gualtieri , Thomas P. Sotiriou , Susanna Barsanti , Paolo Pani This is my paper · ORCID
classification gr-qcastro-ph.HEhep-th
keywords lisascalardetectobjectcompactextremefieldmass
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The Laser Interferometer Space Antenna, LISA, will detect gravitational wave signals from Extreme Mass Ratio Inspirals, where a stellar mass compact object orbits a supermassive black hole and eventually plunges into it. Here we report on LISA's capability to detect whether the smaller compact object in an Extreme Mass Ratio Inspiral is endowed with a scalar field, and to measure its scalar charge -- a dimensionless quantity that acts as a measure of how much scalar field the object carries. By direct comparison of signals, we show that LISA will be able to detect and measure the scalar charge with an accuracy of the order of percent, which is an unprecedented level of precision. This result is independent of the origin of the scalar field and of the structure and other properties of the small compact object, so it can be seen as a generic assessment of LISA's capabilities to detect new fundamental fields.

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Cited by 10 Pith papers

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