Doppler Imaging and Differential Rotation of σ<SUP>2</SUP> Coronae Borealis Using SONG
We present new Doppler images of both components of the double-lined binary σ 2 CrB, based on the high-resolution spectroscopic data collected during 11 nights in 2015 March-April. The observed spectra form two independent data sets with sufficient phase coverage. We apply the least-squares deconvolution to all observed spectra to obtain high
Xiang, Yue et al.
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2020