KEPLER-LIKE MULTI-PLEXING FOR MASS PRODUCTION OF MICROLENS PARALLAXES
KEPLER-LIKE MULTI-PLEXING FOR MASS PRODUCTION OF MICROLENS PARALLAXES
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DOI：
10.1088/2041-8205/779/2/l28
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发表时间：
2013-10
期刊：
影响因子：
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通讯作者：
A. Gould;K. Horne
中科院分区：
文献类型：
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作者：
A. Gould;K. Horne
我们发现，在太阳轨道上，一颗类似开普勒的广视场卫星每年可以获得数千个从地面识别的事件的微透镜视差，产生几十个行星事件的质量和距离。这大约比以前认为的窄角设计大一个数量级。此外，这样的卫星将使行星探测(和质量/距离测定)的数量大约增加一倍。它还将产生具有质量、距离和(经常)全轨道的棕矮星双星宝库，使新的恒星质量函数探测器成为可能，并识别孤立的黑洞候选者。我们表明，实际的开普勒卫星，即使有降级的指向，也可以展示这些能力，并在科学潜力方面取得实质性的初步进展。我们讨论了开普勒卫星的几个“增量”，旨在优化微透镜的视差能力。这些措施中的大多数都会降低成本。这里提倡的广角方法只是最近才变得优于旧的窄角方法，因为现在发现的地面微透镜事件的数量要多得多。
We show that a wide-field Kepler-like satellite in solar orbit could obtain microlens parallaxes for several thousand events per year that are identified from the ground, yielding masses and distances for several dozen planetary events. This is roughly an order of magnitude larger than previously considered narrow-angle designs. Such a satellite would, in addition, roughly double the number of planet detections (and mass/distance determinations). It would also yield a trove of brown-dwarf binaries with masses, distances, and (frequently) full orbits, enable new probes of the stellar mass function, and identify isolated black-hole candidates. We show that the actual Kepler satellite, even with degraded pointing, can demonstrate these capabilities and make substantial initial inroads into the science potential. We discuss several “Deltas” to the Kepler satellite aimed at optimizing microlens parallax capabilities. Most of these would reduce costs. The wide-angle approach advocated here has only recently become superior to the old narrow-angle approach, due to the much larger number of ground-based microlensing events now being discovered.