We study the imprint of light scalar fields on gravitational waves from extreme mass-ratio inspirals-binary systems with a very large mass asymmetry. We first show that, to leading order in the mass ratio, any effects of the scalar on the waveform are captured fully by two parameters: the mass of the scalar and the scalar charge of the secondary compact object. We then use this theory-agnostic framework to show that the future observations by LISA will be able to simultaneously measure both of these parameters with enough accuracy to detect ultralight scalars.
Detecting massive scalar fields with extreme mass-ratio inspirals / Barsanti, Susanna; Maselli, Andrea; Sotiriou, Thomas P.; Gualtieri, Leonardo. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 131:5(2023), pp. 1-8. [10.1103/PhysRevLett.131.051401]
Detecting massive scalar fields with extreme mass-ratio inspirals
Susanna Barsanti;Andrea Maselli;Leonardo Gualtieri
2023
Abstract
We study the imprint of light scalar fields on gravitational waves from extreme mass-ratio inspirals-binary systems with a very large mass asymmetry. We first show that, to leading order in the mass ratio, any effects of the scalar on the waveform are captured fully by two parameters: the mass of the scalar and the scalar charge of the secondary compact object. We then use this theory-agnostic framework to show that the future observations by LISA will be able to simultaneously measure both of these parameters with enough accuracy to detect ultralight scalars.| File | Dimensione | Formato | |
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