Progress on multi-object exoplanet search spectral interferometer

摘要

It's a very important point that fully open up power of Gou Shoujing telescope (LAMOST) in exoplanet detection fieldby developing a multi-exoplanet survey system. But it's an indisputable truth in the present astronomy that a traditionaltype of multi-object high resolution spectrograph is almost impossible to be developed. External DispersedInterferometry 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 exploratorysystem with medium measuring accuracy based on LAMOST low resolution spectrograph works in medium-resolutionmode (R=5,000 - 10,000). And it's believed that will bring some feasible way in the future development of multi-objectmedium/high resolution spectrograph. After prototype experiment in 2010, a complete configuration is under thedevelopment, including a multi-object fixed-delay Michelson interferometer, an iodine cell with multi-fiber opticalcoupling system and a multi-terminal switching system in an efficient fiber physical coupling way. By some effectiveimprovement, the interferometer has smaller cross section and more stable interference component. Moreover, based onphysical and optical fiber coupling technique, it's possible for the iodine cell and the switching system to simultaneouslyand identically coupling 25 pairs of fibers. In paper, all of the progress is given in detail.© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.