首页     To Survive in the Universe    
Services
    Why to Inhabit     Top Contributors     天文图片     收集     论坛     Blog New!     常见问题     登录  
→ Adopt this star  

HD 16000


目录

图像

上传图像

DSS Images   Other Images


相关文章

Evidence of helium abundance differences between young groups of stars
Seven groups of B-type stars - Sco-Cen, NGC 6231, LacOBI,OriOBIb, h + chi Per, CepOBIII, and field stars - wereinvestigated photoelectrically to determine whether helium abundance isuniform in the solar neighborhood and in a region of the spiral arm ofthe Galaxy. Observations were performed using an echelle spectrometer inthe narrow band index of the I (4026) of the He I-4026 line. Amodel-atmosphere analysis of I (4026) and the beta index of the H betaline shows that in the spectral range B O-B 2, the relation between I(4026) and beta is insensitive to differences in the surface gravity butsensitive to differences in the helium to hydrogen ratio. It is foundthat stars in the two groups most distant from the sun - h + chi Per andCepOBIII - have a lower helium abundance than stars in the solarneighborhood.

提交文章


相关链接

  • - 没有找到链接 -
提交链接


下列团体成员


观测天体数据

星座:時鐘座
右阿森松:02h31m58.41s
赤纬:-59°07'10.7"
视星:8.17
距离:265.957 天文距离
右阿森松适当运动:11.7
赤纬适当运动:-21.6
B-T magnitude:9.496
V-T magnitude:8.28

目录:
适当名称
HD 1989HD 16000
TYCHO-2 2000TYC 8490-1154-1
USNO-A2.0USNO-A2 0300-00747100
HIPHIP 11777

→ 要求更多目录从vizier