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arXiv 1012.2570astro-ph.IMastro-ph.EP
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NEO低分辨率摄谱仪的表征科学案例

NEO Characterization Science Case For a Low Resolution Spectrograph

Mark Trueblood, Larry Lebofsky, Robert Crawford

摘要:

近地小行星和死彗星占迄今探测到的近地天体总数的绝大多数。对它们的物理性质所知甚少,而对数量更多的主带小行星则知之甚少。由于近地天体很模糊,可见时间短,许多特征鉴定研究使用3至8种颜色的宽带滤光片进行分类和研究表面化学组成。在小型望远镜(1- 2米级)的活动或持续方案中使用低光谱分辨率R~30的摄谱仪将大大提高近地天体数据的数量和质量。拟议的基线仪器将使用CCD探测器在可见光范围内工作,并可能升级,以包括第二个近红外通道,将覆盖范围扩大到2.5 \mum或更大。光学设计需要优化整体光学吞吐量,以允许在可接受的信噪比(S/N)下在小型望远镜上观察最微弱的物体。一个成像模式,以获得准确的同夜宽带测光将是非常可取的。

英文摘要:

Near Earth Asteroids (NEAs) and dead comets comprise the vast majority of the population of Near Earth Objects (NEOs) detected to date. Less is known of their physical properties than of the much larger population of main-belt asteroids. Due to the faintness and short duration of visibility of NEOs, many characterization studies use broadband filters in 3 to 8 colors for taxonomic classification and to study surface chemical composition. A spectrograph with low spectral resolution R~30 used in a campaign or a continuing program on a small telescope (1-2m class) would vastly improve the quantity and quality of data on NEOs. The proposed baseline instrument would work in the visible using a CCD detector, with a possible upgrade to include a second, near-IR (NIR) channel extending coverage to 2.5 \mum or beyond. The optical design needs to optimize overall optical throughput to permit observation of the faintest possible objects on small telescopes at acceptable signal-to-noise (S/N) ratios. An imaging mode to obtain accurate same-night broadband photometry would be highly desirable.

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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