Progress on multi-object exoplanet search spectral interferometer

Kai Zhang; Yongtian Zhu; Lei Wang; Zhongyu Yue; Yi Chen; Jin Tang; Zhongwen Hu

doi:10.1117/12.925619

24 September 2012 Progress on multi-object exoplanet search spectral interferometer

Kai Zhang, Yongtian Zhu, Lei Wang, Zhongyu Yue, Yi Chen, Jin Tang, Zhongwen Hu

Proceedings Volume 8446, Ground-based and Airborne Instrumentation for Astronomy IV; 844682 (2012) https://doi.org/10.1117/12.925619
Event: SPIE Astronomical Telescopes + Instrumentation, 2012, Amsterdam, Netherlands

Abstract

It's a very important point that fully open up power of Gou Shoujing telescope (LAMOST) in exoplanet detection field by developing a multi-exoplanet survey system. But it's an indisputable truth in the present astronomy that a traditional type of multi-object high resolution spectrograph is almost impossible to be developed. External Dispersed Interferometry is an effective way to improve the radial velocity measuring accuracy of medium resolution spectrograph. With the using of this technique, Multi-object Exoplanet Search Spectral Interferometer (MESSI) is an exploratory system with medium measuring accuracy based on LAMOST low resolution spectrograph works in medium-resolution mode (R=5,000 - 10,000). And it's believed that will bring some feasible way in the future development of multi-object medium/high resolution spectrograph. After prototype experiment in 2010, a complete configuration is under the development, including a multi-object fixed-delay Michelson interferometer, an iodine cell with multi-fiber optical coupling system and a multi-terminal switching system in an efficient fiber physical coupling way. By some effective improvement, the interferometer has smaller cross section and more stable interference component. Moreover, based on physical and optical fiber coupling technique, it's possible for the iodine cell and the switching system to simultaneously and identically coupling 25 pairs of fibers. In paper, all of the progress is given in detail.

Citation Download Citation

Kai Zhang, Yongtian Zhu, Lei Wang, Zhongyu Yue, Yi Chen, Jin Tang, and Zhongwen Hu "Progress on multi-object exoplanet search spectral interferometer", Proc. SPIE 8446, Ground-based and Airborne Instrumentation for Astronomy IV, 844682 (24 September 2012); https://doi.org/10.1117/12.925619

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KEYWORDS

Spectrographs

Interferometers

Astronomical imaging

Iodine cells

Exoplanets

Telescopes

Michelson interferometers

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