Improved parameters of the hydrogen-deficient binary star KSPer
| dc.creator | Kipper, Tonu | |
| dc.creator | Klochkova, Valentina | |
| dc.date | 2008-06-17 | |
| dc.date.accessioned | 2026-07-07T09:45:00Z | |
| dc.date.available | 2026-07-07T09:45:00Z | |
| dc.description | Using the high resolution spectral observations obtained with the Nasmyth Echelle Spectrograph NES of the 6m telescope we analysed the optical spectrum of the hydrogen-deficient binary star KSPer. The atmospheric parameters derived are: effective temperature Teff=9500+/-300 K, surface gravity log g=2.0+/-0.5, and microturbulent velocity Vt=9.5+/-0.5km/s. The hydrogen deficiency is H/He=3x10^{-5}, iron abundance is reduced by 0.8dex; nitrogen abundance is very high [N/Fe]=1.4, but carbon and oxygen abundances are low. The star luminosity is log L/Lo=3.3. A complex absorption and emission structure of the NaI D doublet was revealed. We suggest that the emission component forms in the circumbinary gaseous envelope. | |
| dc.description | 20 pages, 5 figures, 4 tables, submitted to Baltic Astronomy | |
| dc.identifier | https://arxiv.org/abs/0806.2709 | |
| dc.identifier | http://arxiv.org/abs/0806.2709 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/163068 | |
| dc.subject | Astrophysics | |
| dc.title | Improved parameters of the hydrogen-deficient binary star KSPer | |
| dc.type | text |