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arXiv 1409.2875astro-ph.IM
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未来引力波探测器选址的全局优化

Global Optimization for Future Gravitational Wave Detectors' Sites

Yi-Ming Hu, Peter Raffai, Laszlo Gondan, Ik Siong Heng, Nandor Kelecsenyi, Martin Hendry, Zsuzsa Marka, Szabolcs Marka

摘要:

我们考虑了未来几代引力波探测器的最佳选址。之前,Raffai等人使用组合优值优化了2检测器网络。通过首先固定所有其他分量检测器的参数,这种优化以有限的方式扩展到具有两个以上检测器的网络。在这项工作中,我们现在提出了一个更一般的优化,允许所有检测器的位置,同时选择。我们遵循Raffai等人的定义。关于定义某个检测器网络的适用性的度量。给定网络中分量探测器的位置,我们计算网络区分偏振、约束天空定位和重建引力波源参数的能力的度量。我们进一步定义了一个可能的网站位置的“灵活性指数”,通过计算多探测器网络的数量,具有足够高的数字的优点,包括该网站的位置。我们证实了Raffai等人的结论,根据这项工作中定义的灵活性指数,澳大利亚是建造下一代引力波探测器的最佳候选地点。这个结论对于3探测器网络或5探测器网络都是有效的。对于3探测器网络,北欧的站点位置显示出与澳大利亚站点相当的灵活性指数。然而,对于一个5探测器网络,澳大利亚被发现是一个明显比任何其他位置更好的候选人。

英文摘要:

We consider the optimal site selection of future generations of gravitational wave detectors. Previously, Raffai et al. optimized a 2-detector network with a combined figure of merit. This optimization was extended to networks with more than two detectors in a limited way by first fixing the parameters of all other component detectors. In this work we now present a more general optimization that allows the locations of all detectors to be simultaneously chosen. We follow the definition of Raffai et al. on the metric that defines the suitability of a certain detector network. Given the locations of the component detectors in the network, we compute a measure of the network's ability to distinguish the polarization, constrain the sky localization and reconstruct the parameters of a gravitational wave source. We further define the `flexibility index' for a possible site location, by counting the number of multi-detector networks with a sufficiently high Figure of Merit that include that site location. We confirm the conclusion of Raffai et al., that in terms of flexibility index as defined in this work, Australia hosts the best candidate site to build a future generation gravitational wave detector. This conclusion is valid for either a 3-detector network or a 5-detector network. For a 3-detector network site locations in Northern Europe display a comparable flexibility index to sites in Australia. However for a 5-detector network, Australia is found to be a clearly better candidate than any other location.

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。

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