Barsanti Susanna, Maselli Andrea, Sotiriou Thomas P, Gualtieri Leonardo
Dipartimento di Fisica, "Sapienza" Università di Roma, Piazzale Aldo Moro 5, 00185 Roma, Italy.
Sezione INFN Roma1, Roma 00185, Italy.
Phys Rev Lett. 2023 Aug 4;131(5):051401. doi: 10.1103/PhysRevLett.131.051401.
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.
我们研究了轻标量场对来自极端质量比吸积系统（具有非常大的质量不对称性的双星系统）引力波的印记。我们首先表明，在质量比的主导阶次下，标量对波形的任何影响都完全由两个参数捕获：标量的质量和次要致密天体的标量电荷。然后，我们使用这个与理论无关的框架来表明，LISA未来的观测将能够同时以足够的精度测量这两个参数，以探测超轻标量。
