We study binary systems in which a stellar mass compact object spirals into a massive black hole, known as extreme mass ratio inspirals, in scenarios with a new fundamental scalar field. Earlier work has shown that, in most interesting such scenarios and to leading order in the mass ratio, the massive black holes can be adequately approximated by the Kerr metric and the imprint of the scalar field on the waveform is fully controlled by the scalar charge of the stellar mass object. Here we use this drastic simplification in the inspiral modeling and consider eccentric equatorial orbits. We study how the scalar charge affects the orbital evolution for different eccentricities and different values of the black hole spin. We then determine how changes in the orbital evolution get imprinted on the waveform and assess LISA’s capability to detect or constrain the scalar charge.

中文翻译：

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作为标量场探测器的极端质量比螺旋：围绕克尔黑洞的偏心赤道轨道

我们研究了在具有新的基本标量场的情况下，恒星质量致密物体螺旋进入大质量黑洞的二元系统，称为极端质量比螺旋。早期的工作表明，在大多数有趣的此类场景中，质量比领先，大质量黑洞可以通过克尔度量充分近似，并且波形上标量场的印记完全由标量电荷控制恒星质量物体。在这里，我们在 inspiral 建模中使用了这种剧烈的简化，并考虑了偏心赤道轨道。我们研究标量电荷如何影响不同偏心率和不同黑洞自旋值的轨道演化。