High-resolution Spectroscopy of the Wolf–Rayet Nebula NGC 6888

Abstract The iconic Wolf–Rayet bubble NGC 6888 represents a classical shell driven by stellar winds. Its unique properties make it an important target for studying the material ejected from its progenitor star. In order to construct a comprehensive kinematic model of the WR nebula NGC 6888, we report here the preliminary results in the lines of [O iii ], H α and [N ii ] using Manchester Echelle Spectrometer high-resolution spectroscopy from the OAN-SPM. (Based on observations collected at the Observatorio Astronómico Nacional (OAN), operated in Mexico by UNAM.) We found that the expansion velocities associated with the shell range from 64 to 75 km s −1 for the H α and [O iii ] lines, respectively.