Academic Journal
1 OPTICAL SPECTROSCOPY OF RUCAM, A PULSAT- ING CARBON STAR
| العنوان: | 1 OPTICAL SPECTROSCOPY OF RUCAM, A PULSAT- ING CARBON STAR |
|---|---|
| المؤلفون: | Valentina G. Klochkova |
| المساهمون: | The Pennsylvania State University CiteSeerX Archives |
| المصدر: | http://arxiv.org/pdf/0706.2969v1.pdf. |
| سنة النشر: | 2007 |
| المجموعة: | CiteSeerX |
| الوصف: | We analysed the high resolution spectra of a RU Cam, classified as WVir type star. The atmospheric parameters of RUCam were estimated Teff=5250K and log g=1.0. The hydrogen deficiency of RUCam was not confirmed. The iron abundance, [Fe/H]=−0.37, is close to the solar one. Abundances of most other elements are also close to normal. We found considerable excesses of carbon and nitrogen: [C/Fe]=+0.98, [N/Fe]=+0.60. The carbon to oxygen ratio is C/O>1. The carbon isotopic abundance ratio is equal to 12 C / 13 C=4.5. For sodium a moderate overabundance Na/Fe=+0.55 was obtained. For two moments of observations we found close heliocentric velocity values, vr=−21.7 ± 0.8 and −23.1 ± 1.0kms −1. Both spectra contain a peculiar feature – an emission component of Na I doublet which location agrees with the radial velocity from the bulk of metallic lines. For our two observing moments we found no dependence of radial velocities on the formation depth or on excitation energy for metallic lines. |
| نوع الوثيقة: | text |
| وصف الملف: | application/pdf |
| اللغة: | English |
| Relation: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.250.3257; http://arxiv.org/pdf/0706.2969v1.pdf |
| الاتاحة: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.250.3257 http://arxiv.org/pdf/0706.2969v1.pdf |
| Rights: | Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
| رقم الانضمام: | edsbas.4D7BDA5A |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |