Pushing least-squares deconvolution to the next level: Application to binary stars A. Tkachenko, V. Tsymbal, S. Zvyagintsev, H. Lehmann, F. Petermann and D. E. Mkrtichian A&A, 666 (2022) A180 Published online: 26 October 2022 DOI: 10.1051/0004-6361/202244188