The Planet as Exoplanet Analog Spectrograph (PEAS): design and first-light

The Planet as Exoplanet Analog Spectrograph (PEAS): design and first-light
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作为系外行星的行星模拟摄谱仪(PEAS):设计和第一光

DOI:
10.1117/12.2560706
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发表时间:
2020
期刊:
SPIE Astronomical Telescopes & Instrumentation 2020 Proceedings
影响因子:
--
通讯作者:
Marques, David
Marques, David
中科院分区:
--
文献类型:
--
作者:
Martin, Emily C.;Skemer, Andrew J.;Radovan, Matthew;Allen, Steve;Black, David;Deich, William;Fortney, Jonathan;Kruglikov, Gabriel;MacDonald, Nicholas;Marques, David

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系外行星在我们的银河系中非常丰富,但对其进行表征仍然是一项技术挑战。太阳系行星提供了一个机会,可以用我们无法获得的高信噪比数据来测试系外行星观测的实际局限性。然而,太阳系行星的数据不同于系外行星,因为太阳系行星是空间解析的,而系外行星是未解析的点源。我们提出了一种新的仪器,旨在观察太阳系行星,虽然他们是系外行星,行星作为系外行星模拟光谱仪(PEAS)。PEAS由一个专用的0.5米望远镜和现成的光学系统组成,位于利克天文台。PEAS使用积分球对来自太阳系行星的光进行圆盘积分,产生与我们从系外行星获得的光谱更相似的空间混合光。本文介绍了PEAS仪器的总体系统设计和初步结果。
Exoplanets are abundant in our galaxy and yet characterizing them remains a technical challenge. Solar System planets provide an opportunity to test the practical limitations of exoplanet observations with high signal-to-noise data that we cannot access for exoplanets. However, data on Solar System planets differ from exoplanets in that Solar System planets are spatially resolved while exoplanets are unresolved point-sources. We present a novel instrument designed to observe Solar System planets as though they are exoplanets, the Planet as Exoplanet Analog Spectrograph (PEAS). PEAS consists of a dedicated 0.5-m telescope and off-the-shelf optics, located at Lick Observatory. PEAS uses an integrating sphere to disk-integrate light from the Solar System planets, producing spatially mixed light more similar to the spectra we can obtain from exoplanets. This paper describes the general system design and early results of the PEAS instrument.
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