摘要：Stable shell stars are ideal objects for studying basic physical principles of the
formation of disks in Be stars. If these stars have a close unresolved visual companion,
its contribution toward the modelling of the disk cannot be overlooked, as is sometimes
done. The study aims to spectroscopically resolve close visual binary Be (shell) star
1 Del, which up to now was only resolved by speckle or micrometric measurements. The
integral field spectroscopy obtained by the SINFONI spectrograph at the VLT telescope in
the European Southern Observatory (ESO) in the infrared region was used; we supplemented
these observations with visual spectroscopy with the Perek Telescope at the Ondřejov
Observatory. Spectra of 1 Del were successfully resolved, and, for the first time,
spectra of 1 Del B were obtained. We found that 1 Del A is a Be/shell star, while
1 Del B is not an emission-line object.
关键词：stars: emission-line, Be;binaries: visual;infrared:
stars;stars: individual: 1 Del
