Geodesic Models of Quasi-periodic-oscillations as Probes of Quadratic Gravity
Geodesic Models of Quasi-periodic-oscillations as Probes of Quadratic Gravity
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作为二次重力探针的准周期振荡测地线模型
DOI：
10.3847/1538-4357/aa72e2
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
L. Stella
中科院分区：
文献类型：
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作者：
A. Maselli;P. Pani;R. Cotesta;L. Gualtieri;V. Ferrari;L. Stella
未来的超大面积X射线仪器（其有效面积大于m2）将能够测量在吸积致密物体的X射线通量中观察到的准周期振荡（QPO）的频率，精度低于%。如果正确建模，QPO可以提供一种新的方法来测试重力的强场状态。通过使用相对论进动模型和修改版本的周转共振模型，我们开发了一种方法来测试广义相对论对一般类的理论与二次曲率修正。随着仪器正在研究未来的任务，如eXTP，LOFT，或STROBE-X，测量至少两个QPO三胞胎从恒星质量的黑洞可以设置严格的约束二次引力的耦合参数。
Future very-large-area X-ray instruments (for which the effective area is larger than m2) will be able to measure the frequencies of quasi-periodic oscillations (QPOs) observed in the X-ray flux from accreting compact objects with sub-percent precision. If correctly modeled, QPOs can provide a novel way to test the strong-field regime of gravity. By using the relativistic precession model and a modified version of the epicyclic resonance model, we develop a method to test general relativity against a generic class of theories with quadratic curvature corrections. With the instrumentation being studied for future missions such as eXTP, LOFT, or STROBE-X, a measurement of at least two QPO triplets from a stellar mass black hole can set stringent constraints on the coupling parameters of quadratic gravity.