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Proceedings Paper

Progress on multi-object exoplanet search spectral interferometer
Author(s): Kai Zhang; Yongtian Zhu; Lei Wang; Zhongyu Yue; Yi Chen; Jin Tang; Zhongwen Hu
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Paper 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.

Paper Details

Date Published: 24 September 2012
PDF: 6 pages
Proc. SPIE 8446, Ground-based and Airborne Instrumentation for Astronomy IV, 844682 (24 September 2012); doi: 10.1117/12.925619
Show Author Affiliations
Kai Zhang, Nanjing Institute of Astronomical Optics & Technology (China)
Yongtian Zhu, Nanjing Institute of Astronomical Optics & Technology (China)
Lei Wang, Nanjing Institute of Astronomical Optics & Technology (China)
Zhongyu Yue, Nanjing Institute of Astronomical Optics & Technology (China)
Yi Chen, Nanjing Institute of Astronomical Optics & Technology (China)
Jin Tang, Nanjing Institute of Astronomical Optics & Technology (China)
Zhongwen Hu, Nanjing Institute of Astronomical Optics & Technology (China)


Published in SPIE Proceedings Vol. 8446:
Ground-based and Airborne Instrumentation for Astronomy IV
Ian S. McLean; Suzanne K. Ramsay; Hideki Takami, Editor(s)

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