Spectroscopy of close visual binary components of the stable shell star 1 Delphini

0462098 - ASÚ 2017 RIV FR eng J - Journal Article
Kubát, Jiří - Kubátová, Brankica - Doležalová, B. - Iliev, L. - Šlechta, Miroslav
Spectroscopy of close visual binary components of the stable shell star 1 Delphini.
Astronomy & Astrophysics. Roč. 587, March (2016), A22/1-A22/5. ISSN 0004-6361. E-ISSN 1432-0746
R&D Projects: GA ČR GA13-10589S
Institutional support: RVO:67985815
Keywords : Be stars * emission-line * infrared stars
OECD category: Astronomy (including astrophysics,space science)
Impact factor: 5.014, year: 2016

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 Ondrejov Observatory. Spectra of 1 Del were successfully resolved, and, for the first time, spectra of 1 Del B were obtained. We found that 1 DelA is a Be/shell star, while 1 Del B is not an emission-line object.
Permanent Link: http://hdl.handle.net/11104/0261623