科罗拉多紫外线Transit实验（CUTE）：一个专门的立方体卫星任务，研究系外行星质量损失和磁场
The Colorado Ultraviolet Transit Experiment (CUTE): A dedicated cubesat mission to study exoplanetary mass loss and magnetic fields
摘要：
科罗拉多紫外线凌日实验（CUTE）是一个近紫外（2550 - 3300埃）6 U立方体卫星任务，旨在监测凌日热彗星，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）线，以寻找增强过境吸收的证据，并寻找由于行星轨道运动之前的弓形冲击而早期进入的证据。作为一个专门的任务，CUTE将在一个名义上为期7个月的任务中观察100多个热彗星的光谱凌日。这相当于超过700个轨道的唯一其他仪器能够进行这些测量，哈勃太空望远镜。CUTE通过创新的光学设计有效地利用了可用的cubesat体积，实现了28平方米的投影有效面积。cm，低仪器背景，以及在主要科学带通上的3000的光谱分辨能力。这些性能特征使CUTE能够在各个光谱吸收线中辨别0.1 - 1%之间的过渡深度。我们介绍了CUTE的光学和机械设计，科学动机和预期结果的总结，以及预计的制造，校准和发射时间轴的概述。
英文摘要：
The Colorado Ultraviolet Transit Experiment (CUTE) is a near-UV (2550 - 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 more than 100 spectroscopic transits of hot Jupiters over a nominal seven month mission. This represents the equivalent of more than 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 28 sq. cm, low instrumental background, and a spectral resolving power of 3000 over the primary science bandpass. These performance characteristics enable CUTE to discern transit depths between 0.1 - 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.
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