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 251838


目录

图像

上传图像

DSS Images   Other Images


相关文章

Pulkovo compilation of radial velocities for 35495 stars in a common system.
Not Available

Kinematics of Sandage-Fouts stars in three cardinal directions
V and (B - V) for 429, 442, and 427 stars are observed in the directionsof the anticenter, Cygnus, and the NGP, respectively, and DDO colors forthose stars G0 and later. The samples observed are ones for whichSandage and Fouts (1987) have published radial velocities. W, V, and Wcomponents of space velocity are derived from DDO distances withavailable proper motions. A clear correlation was found to exist betweenthe velocity dispersions and Fe/H with the dispersions decreasing asFe/H increases to about + 0.00, where V then becomes significantlynegative. The 'thick disk' component is clearly recognized, with sigma(W) approximately equal to 36 km/sec. In the 'old thin disk' and the'young thin disk', 43 percent and 42 percent of the stars have negativeV values, respectively.

U, V, W velocity components for the old disk using radial velocities of 1295 stars in the three cardinal Galactic directions
New radial velocities are presented for 1295 stars chosen at random nearthe three cardinal Galactic directions of l = 180 deg, b = 0; l = 90deg, b = 0 deg; and b = 90 deg, giving the distribution in U, V, and W,respectively, from the radial velocities alone. The measurements weremade with the coude spectrograph of the Mount Wilson 100 in. Hookerreflector. The purpose of the program is to set limits on the densitynormalization in the solar neighborhood of the old thin disk, the oldthick disk, and the halo. Many more high-velocity stars are present inthe unbiased sample than expected from previous estimates of thenormalization. The data suggest the density ratios in the solarneighborhood to be about 90 percent, 10 percent, and about 0.5 percentfor the thin disk, thick disk, and halo populations, respectively.

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:御夫座
右阿森松:06h07m48.56s
赤纬:+30°06'22.7"
视星:10.046
右阿森松适当运动:14.9
赤纬适当运动:-22.6
B-T magnitude:10.704
V-T magnitude:10.101

目录:
适当名称
HD 1989HD 251838
TYCHO-2 2000TYC 2419-1310-1
USNO-A2.0USNO-A2 1200-04368865
HIPHIP 29060

→ 要求更多目录从vizier