arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 2406.09228gr-qcastro-ph.COastro-ph.IM
收藏

利用 LISA 测量引力波记忆

Measuring gravitational wave memory with LISA

Henri Inchauspé, Silvia Gasparotto, Diego Blas, Lavinia Heisenberg, Jann Zosso, Shubhanshu Tiwari

AI总结:

本文利用 LISA 联盟最新时域响应模拟和大质量黑洞双星种群模型,评估 LISA 对引力波记忆的可探测性及其数据流特征。

摘要:

引力波(GW)天文学已经彻底改变了我们探索自然的能力。下一代观测台,其中包括星载探测器 Laser Interferometer Space Antenna(LISA,激光干涉空间天线),预计将带来数个数量级的信噪比提升,并触及广义相对论中更微弱且新颖的特征。其中,一个令人兴奋的可能性是探测引力波记忆。引力波记忆可解释为引力波扰动穿过探测器后背景时空发生的永久形变,它为检验广义相对论、认识引力的非线性本质,以及提供补充信息以更好地表征引力波源,开辟了一条新途径。以往研究已经表明,利用 LISA 有望从大质量黑洞双星的单次并合中探测到引力波记忆。然而,这些工作并未模拟探测器对引力波记忆的正确时域响应。本研究填补了这一空白,并利用 LISA 联盟最新的响应模拟,给出了 LISA 对引力波记忆的探测前景,以及引力波记忆在数据流中的预期信号特征。我们关注大质量黑洞双星并合产生的引力波记忆,并采用最先进的种群模型来评估在 LISA 任务寿命内探测到引力波记忆的可能性。我们的结论是,引力波记忆将成为 LISA 探测到的若干事件的一个关键特征,并将有助于充分发挥该任务的科学潜力。

英文摘要:

Gravitational wave (GW) astronomy has revolutionized our capacity to explore nature. The next generation of observatories, among which the space-borne detector Laser Interferometer Space Antenna LISA, is expected to yield orders of magnitude of signal-to-noise ratio improvement, and reach fainter and novel features of General Relativity. Among them, an exciting possibility is the detection of GW memory. Interpreted as a permanent deformation of the background spacetime after a GW perturbation has passed through the detector, GW memory offers a novel avenue to proof-test General Relativity, access the non-linear nature of gravity, and provide complementary information to better characterize the GW source. Previous studies have shown that GW memory detection from individual mergers of massive black hole binaries is expected with LISA. However, these works have not simulated the proper time domain response of the detector to the GW memory. This work is filling this gap and presents the detection prospects of LISA regarding GW memory and the expected signature of GW memory on the data-streams using the most up-to-date LISA consortium simulations of the response. We focus on the GW memory of massive black hole binary mergers and use state-of-the-art population models to assess the likelihood of detecting the GW memory within the LISA lifetime. We conclude that GW memory will be a key feature of several events detected by LISA, and will help to exploit the scientific potential of the mission fully.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑