Abstract
A high-resolution echelle spectrometer with broad wavelength coverage from the UV to the IR and high sensitivity to weak lines is described. Total instrument astigmatism is suppressed through rotation of the order separation system into an orthogonal plane. A suitable choice of mirror angles avoids increased coma. This spectrometer is used to record UV through IR spectra of Fe-group ions to measure improved branching fractions. These new results reduce transition probability uncertainties and yield more accurate derived stellar abundances. Instrument design and performance, including aberration compensation, are presented.
© 2012 Optical Society of America
Full Article | PDF ArticleMore Like This
Xiao Fu, Fajie Duan, Jiajia Jiang, Tingting Huang, Ling Ma, and Changrong Lv
Appl. Opt. 56(28) 7861-7868 (2017)
Daniel J. Schroeder
Appl. Opt. 6(11) 1976-1980 (1967)
Ting Ai Chen, Yi Tang, Li Jun Zhang, Yue E. Chang, and Cheng Zheng
Appl. Opt. 53(4) 565-576 (2014)