Circumstellar components in 24 lines of the optical spectrum of HR 10. The photospheric profiles have been subtracted and, for the sake of clarity, the narrow absorption features have been scaled to the same size. The red and blue lines mark the radial velocities of the D (deep) and S (shallow) components, − 14.80 ± 0.50 + 15.16 ± 1.54 km s⁻¹, respectively, of the Ca II K narrow absorption, which has been plotted with a thicker line. The dashed line marks the RV of the system, − 2.18 ± 0.32 km s⁻¹. The line identification with the wavelength in nm is included. See text for details.