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Title:
Test of Multi-object Exoplanet Search Spectral Interferometer
Author: Zhang, Kai(张凯) ; Liang Wang ; Jiang, HaiJiao(姜海娇) ; Hu, ZhongWen(胡中文) ; Zhu, YongTian(朱永田) ; Hou, YongHui(候永辉) ; Dai, SongXin(戴松新) ; Tang, Jin(汤瑾) ; Tang, Zhen(汤振) ; Ceng, YiZhong(曾裔中) ; Chen, Yi(陈忆) ; Wang, Lei(王磊)
Issued Date: 2014-08-06
Conference Date: 2014-6-22
Conference Place: Montréal, Quebec, Canada
Keyword: Exoplanet detection ; Radial velocity measurement ; Multi-object observation ; Fixed delay Interferometer ; Interference spectrum
Subject: 终端仪器::天文光谱仪 ; 天文技术与方法
English Abstract:
Exoplanet detection, a highlight in the current astronomy, will be part of puzzle in astronomical and astrophysical future, which contains dark energy, dark matter, early universe, black hole, galactic evolution and so on. At present, most of the detected Exoplanets are confirmed through methods of radial velocity and transit. Guo shoujing Telescope well known as LAMOST is an advanced multi-object spectral survey telescope equipped with 4000 fibers and 16 low resolution fiber spectrographs. To explore its potential in different astronomical activities, a new radial velocity method named Externally Dispersed Interferometry (EDI) is applied to serve Exoplanet detection through combining a fixed-delay interferometer with the existing spectrograph in medium spectral resolution mode (R=5,000-10,000). This new technology has an impressive feature to enhance radial velocity measuring accuracy of the existing spectrograph through installing a fixed-delay interferometer in front of spectrograph. This way produces an interference spectrum with higher sensitivity to Doppler Effect by interference phase and fixed delay. This relative system named Multi-object Exoplanet
Search Spectral Interferometer (MESSI) is composed of a few parts, including a pair of multi-fiber coupling sockets, a remote control iodine subsystem, a multi-object fixed delay interferometer and the existing spectrograph. It covers from 500 to 550 nm and simultaneously observes up to 21 stars. Even if it’s an experimental instrument at present, it’s still well demonstrated in paper that how MESSI does explore an effective way to build its own system under the existing condition of LAMOST and get its expected performance for multi-object Exoplanet detection, especially instrument stability and its special data reduction. As a result of test at lab, inside temperature of its instrumental chamber is stable in a range of ±0.5degree Celsius within 12 hours, and the direct instrumental stability without further observation correction is equivalent to be ±50m/s every 20mins
Sponsorship: SPIE
Source: Ground-based and Airborne Instrumentation for Astronomy V
Publisher: SPIE
Content Type: 会议论文
URI: http://ir.niaot.ac.cn/handle/114a32/812
Appears in Collections:中科院南京天光所知识成果_会议论文
天文光谱和高分辨成像技术研究室_会议论文

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Recommended Citation:
Kai Zhang,Liang Wang,Haijiao Jiang,et al. Test of Multi-object Exoplanet Search Spectral Interferometer[C]. 见:. Montréal, Quebec, Canada. 2014-6-22.
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