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arXiv 1306.3253astro-ph.IMgr-qc
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指向类LISA的引力波探测器

Pointing LISA-like gravitational wave detectors

Karan P. Jani, Lee Samuel Finn, Matthew J. Benacquista

摘要:

基于激光干涉仪空间天线(LISA)设计的天基引力波探测器通过合成一个或多个干涉仪来运行,干涉仪来自条纹速度测量值,条纹速度测量值是由一组特殊的无阻力日心轨道中三个航天器之间的光传播时间变化产生的。这些轨道决定了合成干涉仪相对于黄道平面的倾角。一旦这些航天器被放置在其轨道上,干涉仪在未来任何时候的方向都是根据开普勒定律确定的,该定律基于航天器星座的初始方向,可以自由选择。在整个太阳轨道的过程中,初始方位确定了天空中探测器对引力波具有最大灵敏度的一组位置,以及探测器响应中的零值落在的一组位置。通过巧妙地选择初始方向,我们可以选择优化或抑制天线对位置可能预先已知的源的灵敏度(例如,银河系中心或球状星团)。

英文摘要:

Space-based gravitational wave detectors based on the Laser Interferometer Space Antenna (LISA) design operate by synthesizing one or more interferometers from fringe velocity measurements generated by changes in the light travel time between three spacecraft in a special set of drag-free heliocentric orbits. These orbits determine the inclination of the synthesized interferometer with respect to the ecliptic plane. Once these spacecraft are placed in their orbits, the orientation of the interferometers at any future time is fixed by Kepler's Laws based on the initial orientation of the spacecraft constellation, which may be freely chosen. Over the course of a full solar orbit, the initial orientation determines a set of locations on the sky were the detector has greatest sensitivity to gravitational waves as well as a set of locations where nulls in the detector response fall. By artful choice of the initial orientation, we can choose to optimize or suppress the antennas sensitivity to sources whose location may be known in advance (e.g., the Galactic Center or globular clusters).

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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