التفاصيل البيبلوغرافية
| العنوان: |
The helium-to-hydrogen ratio of the UV-bright star Barnard 29 of Messier 13 |
| المؤلفون: |
Adelman, S. J, Aikman, G. C. L, Hayes, D. S, Philip, A. G. D, Sweigart, A. V |
| المصدر: |
Astronomy and Astrophysics. 282(1) |
| بيانات النشر: |
United States: NASA Center for Aerospace Information (CASI), 1994. |
| سنة النشر: |
1994 |
| مصطلحات موضوعية: |
Astronomy |
| الوصف: |
Barnard 29 is the most luminous UV-bright star of the globular cluster Messier 13. Comparison of its reddening corrected optical region spectrophotometry and IUE low dispersion fluxes and its H-gamma profile with the predictions of metal-poor model atmospheres having the metallicity of M 13 indicated T(sub eff) = 20250 K, log g = 3.15. Observations of He I lambda(4026) taken with echelle spectrograph of the Multi-Mirror telescope using a Reticon detector show that He/H = 0.055 +/- 0.020. Some astrophysical implications of this result are discussed. |
| نوع الوثيقة: |
Report |
| اللغة: |
English |
| تدمد: |
0004-6361 |
| URL الوصول: |
https://ntrs.nasa.gov/citations/19950039092 |
| ملاحظات: |
RTOP 188-41-51 |
| رقم الانضمام: |
edsnas.19950039092 |
| قاعدة البيانات: |
NASA Technical Reports |
Full Text Finder