Background for gravitational wave signal at LISA from refractive index of solar wind plasma
Background for gravitational wave signal at LISA from refractive index of solar wind plasma
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DOI：
10.1093/mnrasl/slaa155
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发表时间：
2020-08
影响因子：
--
通讯作者：
A. Smetana
中科院分区：
文献类型：
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作者：
A. Smetana
一个强有力的迹象表明，天基引力天线，特别是2017年为响应欧空局呼吁的L3任务概念而引入的激光干涉仪空间天线(LISA)概念，将对干扰引力波预期信号的强背景信号敏感。错误信号是由于太阳风的电子数密度的变化，导致流经行星际空间的等离子体的折射率发生变化。作为对策，本文提出了两种解决方案。第一个解决方案是在LISA任务中部署足够的太阳风探测器，以便获得可靠的太阳风背景知识。第二种解决方案是为LISA干涉仪配备具有不同波长的第二束激光，以允许从干涉数据中抵消背景太阳风信号。
A strong indication is presented that the space-based gravitational antennas, in particular the Laser Interferometer Space Antenna (LISA) concept introduced in 2017 in response to the ESA call for L3 mission concepts, are going to be sensitive to a strong background signal interfering with the prospected signal of gravitational waves. The false signal is due to variations in the electron number density of the solar wind, causing variations in the refractive index of plasma flowing through interplanetary space. As countermeasures, two solutions are proposed. The first solution is to deploy enough solar wind detectors to the LISA mission to allow for reliable knowledge of the solar wind background. The second solution is to equip the LISA interferometer with a second laser beam with a distinct wavelength to allow cancelling of the background solar wind signal from the interferometric data.