Colorado Ultraviolet Transit Experiment: a dedicated CubeSat mission to study exoplanetary mass loss and magnetic fields
Colorado Ultraviolet Transit Experiment: a dedicated CubeSat mission to study exoplanetary mass loss and magnetic fields
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DOI：
10.1117/1.jatis.4.1.014004
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发表时间：
2018-01-01
影响因子：
2.3
通讯作者：
Petit, Pascal M.
中科院分区：
文献类型：
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作者：
Fleming, Brian T.;France, Kevin;Petit, Pascal M.
科罗拉多紫外线凌日实验 (CUTE) 是一项近紫外线（2550 至 3300 埃）6U 立方体卫星任务，旨在监测凌日热木星，以量化其大气质量损失和磁场。 CUTE 将探测原子（Mg 和 Fe）和分子（OH）谱线，以寻找凌日吸收增强的证据，并寻找由于行星轨道运动之前的弓形激波而导致早期进入的证据。作为一项专门任务，CUTE 将在名义上 7 个月的任务中观测到超过或类似的热木星光谱凌日 100 次。这相当于唯一能够进行这些测量的其他仪器（哈勃太空望远镜）的 700 多个轨道。 CUTE 通过创新的光学设计有效利用可用的 CubeSat 体积，以实现类似于 28 cm(2) 的投影有效面积、低仪器背景以及在初级科学带通上类似于 3000 的 R 光谱分辨率。这些性能特征使 CUTE 能够辨别各个光谱吸收线中 0.1% 到 1% 之间的传输深度。我们介绍了 CUTE 光学和机械设计、科学动机和预期结果的总结，以及预计制造、校准和发射时间表的概述。 (c) 2018 年光电仪器工程师学会 (SPIE)
The Colorado Ultraviolet Transit Experiment (CUTE) is a near-UV (2550 to 3300 angstrom) 6U CubeSat mission designed to monitor transiting hot Jupiters to quantify their atmospheric mass loss and magnetic fields. CUTE will probe both atomic (Mg and Fe) and molecular (OH) lines for evidence of enhanced transit absorption, and to search for evidence of early ingress due to bow shocks ahead of the planet's orbital motion. As a dedicated mission, CUTE will observe greater than or similar to 100 spectroscopic transits of hot Jupiters over a nominal 7-month mission. This represents the equivalent of >700 orbits of the only other instrument capable of these measurements, the Hubble Space Telescope. CUTE efficiently utilizes the available CubeSat volume by means of an innovative optical design to achieve a projected effective area of similar to 28 cm(2), low instrumental background, and a spectral resolving power of R similar to 3000 over the primary science bandpass. These performance characteristics enable CUTE to discern transit depths between 0.1% and 1% in individual spectral absorption lines. We present the CUTE optical and mechanical design, a summary of the science motivation and expected results, and an overview of the projected fabrication, calibration, and launch timeline. (c) 2018 Society of Photo-Optical Instrumentation Engineers (SPIE)