环境相减 EMRI 重力波信号的可测量参数组合

IF 1.9 4区 物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS New Astronomy Pub Date : 2024-06-08 DOI:10.1016/j.newast.2024.102263
Marco Immanuel B. Rivera , Reinabelle C. Reyes
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引用次数: 0

摘要

未来的星载激光干涉仪空间天线(LISA)有望探测到来自极端质量比激发(EMRI)双星的引力波(GW),这些双星可能生活在吸积盘等非简单环境中。在这项工作中,我们应用费舍尔矩阵主成分分析(PCA)方法来评估 LISA 观测能在多大程度上共同约束 EMRI 周围的源参数和环境密度。具体来说,我们根据嵌入恒定密度曲线流体中的 EMRI 双星的后牛顿参数计算费雪矩阵。我们确定,最主要的可测量参数组合是由环境效应贡献的,即引力拖拽、吸积和引力(按贡献大小排序)。提议的 PN 参数重新参数化可以用来提高未来探测和参数估计方法的功率和效率。
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Measurable parameter combinations of environmentally-dephased EMRI gravitational-wave signals

The future space-borne Laser Interferometer Space Antenna (LISA) is expected to detect gravitational waves (GW) from Extreme Mass Ratio Inspiral (EMRI) binaries which may live in nontrivial environments such as accretion disks. In this work, we apply the Fisher matrix Principal Component Analysis (PCA) method to assess how well LISA observations can jointly constrain the source parameters and environmental densities around EMRIs. Specifically, we calculate the Fisher matrix from the post-Newtonian parameters of an EMRI binary embedded in a fluid with a constant density profile. We determine that the most dominant measurable parameter combination is dominated by contributions from environmental effects, namely, gravitational drag, accretion, and gravitational pull (in order of contribution). The proposed reparameterization of the PN parameters can be used to improve the power and efficiency of future detection and parameter estimation methods.

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来源期刊
New Astronomy
New Astronomy 地学天文-天文与天体物理
CiteScore
4.00
自引率
10.00%
发文量
109
审稿时长
13.6 weeks
期刊介绍: New Astronomy publishes articles in all fields of astronomy and astrophysics, with a particular focus on computational astronomy: mathematical and astronomy techniques and methodology, simulations, modelling and numerical results and computational techniques in instrumentation. New Astronomy includes full length research articles and review articles. The journal covers solar, stellar, galactic and extragalactic astronomy and astrophysics. It reports on original research in all wavelength bands, ranging from radio to gamma-ray.
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