SONG-China Project High Resolution Spectrograph and High Precision Radial Velocity Measurements of Asteroseismology
YAN Zheng-zhou1，2，5, DENG Li-cai1, ZHANG Chun-guang1, LUO Chang-qing1, Grundahl F3, HU Zhong-wen4, JI Hang-xin4, WANG Jia-ning4, XU Ming-ming4, DAI Song-xing4, Andersen M F3, WANG Kun5, TIAN Jian-feng1
1. National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
2. University of Chinese Academy of Sciences, Beijing 100049, China
3. Aarhus University，Aarhus, Danmark
4. Nanjing Institute of Astronomical Optics & Technology, National Astronomical Observatories, Chinese Academy of Sciences, Nanjing 210042, China
5. China West Normal University, Nanchong 817000, China
Abstract：SONG (Stellar Observations Network Group) is an international collaboration project involving many countries. Chinese stellar physics community is participating the project as a national member, contributing a full set of instruments and a site. The key instrument is a high resolution spectrograph which, when adopting iodine cell for wave length calibration, can deliver radial velocity measurements at an accuracy of 1 m·s-1. Such a high accuracy together with the long term stability is the keys to the science goals of SONG, one of which is to study the internal structure of stars directly using the technique of Asteroseismology. In this paper, we are going to present the design, parameters and performance of the spectrograph by using spectra taken during the commissioning of the system. As long term thermo-mechanic stability of the system is extremely important for the science goals, we will also describe the laboratory environments to realize such a condition.
Key words：High resolution spectrograph; High precision radial velocity measurements
闫正洲，邓李才，张春光，罗常青，Grundahl F，胡中文，季杭馨，王家宁，徐明明，戴松星，Andersen M F，王 坤，田健峰. 中国SONG项目高分辨光谱仪与高精度恒星震动视向速度测量[J]. 光谱学与光谱分析, 2018, 38(02): 621-626.
YAN Zheng-zhou, DENG Li-cai, ZHANG Chun-guang, LUO Chang-qing, Grundahl F, HU Zhong-wen, JI Hang-xin, WANG Jia-ning, XU Ming-ming, DAI Song-xing, Andersen M F, WANG Kun, TIAN Jian-feng. SONG-China Project High Resolution Spectrograph and High Precision Radial Velocity Measurements of Asteroseismology. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2018, 38(02): 621-626.
[1] Grundahl F, Christensen-Dalsgaard J, Kjeldsen H, et al. ASP-CS, eds. Dikpati M, et al., 2009, 416.
[2] Uytterhoeven K, Palle P L, Grundahl S, et al. Astron Nachr, 2012，AN 333(10)：1103.
[3] Deng Licai, Xin Yu, Zhang Xiaobin, et al. Song China Project-Participating in the Global Network, Proc. IAU, 2012, 8(S288): 318.
[4] Zhu Yongtian, Hu zhongwen, Wang Lei, et al. SCIENTIA SINICA Phys., Mech & Astron., 2011, 41(11): 1337.
[5] Raskin G, Van Winkel H, Hensberge H, et al. Astronomy & Astrophysics，2011，526：A69.
[6] Pepe F, Mayor M, Delabre B, et al. Proc. SPIE，2000，4008：582.
[7] Dekker Hans, D’Odorico Sandro, Kaufer A, et al. Proc. SPIE，2000，4008：534.
[8] Baranne A. ESO Conference on Very Large Telescopes and their Instrumentation, 1988，2：1195.
