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arXiv 2602.18385gr-qcastro-ph.HEastro-ph.SR
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利用LISA探测太阳g模的前景

Detection prospects of solar $g$-modes with LISA

Indian Institute of Technology Bombay(印度理工学院孟买分校)

Aman Awasthi

AI总结:

本文基于当前太阳模型和更新的探测器灵敏度,研究了利用空间引力波探测器检测太阳振荡模式的可能性,重点评估了太阳g模在低频带的可检测性,并与天琴计划进行比较。

摘要:

在引力波干涉仪的背景下,研究了利用空间引力波探测器检测太阳振荡模式的可能性。Polnarev等人证明低频太阳模式原则上可以在LISA型干涉仪中产生可检测信号。本文基于当前太阳模型、更新的探测器灵敏度和改进的理论与观测约束,重新审视该问题。通过使用标准太阳模型生成的MESA和GYRE计算的模本征频率和本征函数,计算了太阳振荡模式的引力响应。主要研究太阳g模,评估了l=2和 azimuthal 顺序m=0和m=2的响应。分析同时结合了早期提出的和更新的LISA灵敏度曲线,并在相关低频带与天琴任务进行了比较。为评估预测信号的鲁棒性,使用两种不同的标准太阳模型(基于GS98和AGSS09丰度编目)估计了引力响应。发现两种模型的结果几乎相同,表明太阳金属licity的不确定性对空间干涉仪检测太阳g模的可检测性影响很小。

英文摘要:

The possibility of detecting solar oscillation modes using space-based gravitational-wave detectors has been investigated in the context of gravitational-wave interferometry, with Polnarev \cite{Polnarev:2009xf} demonstrating that low-frequency solar modes could, in principle, produce detectable signals in a LISA-type interferometer. Motivated by this work, I revisit the problem using current solar models, updated detector sensitivities, and improved theoretical and observational constraints on mode amplitudes. In this study, I compute the gravitational response of solar oscillation modes using standard solar models generated with \texttt{MESA}, and mode eigenfrequencies and eigenfunctions calculated with \texttt{GYRE}. I focus primarily on solar $g$ modes, evaluating their responses for degree $l=2$ and azimuthal orders $m=0$ and $m=2$. The analysis incorporates both the earlier proposed and the current updated LISA sensitivity curves, and I perform a comparative assessment with the TianQin mission in the relevant low-frequency band. To assess the robustness of the predicted signals, I estimate the gravitational responses using two different standard solar models based on the GS98 and AGSS09 abundance compilations. I find that the resulting signal responses are nearly identical for the two models, indicating that uncertainties in solar metallicity have a negligible impact on the detectability of solar $g$ modes by space-based interferometers.

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