首页     开始     To Survive in the Universe    
Inhabited Sky
    News@Sky     天文图片     收集     论坛     Blog New!     常见问题     新闻     登录  

IC 1139


目录

图像

上传图像

DSS Images   Other Images


相关文章

A spectroscopic study of NGC 6251 and its companion galaxies
Measurements of the velocities of galaxies thought to be associated withthe giant radio galaxy NGC 6251 confirm the presence of a poor clusterwith a systemic redshift of z=0.0244+/-0.0004 and a line-of-sightvelocity dispersion ofσz=283(+109,-52)kms-1. This suggests acluster atmosphere temperature of T=0.7(+0.6,-0.2)keV, which is notenough to confine the radio jet by gas pressure. The core of NGC 6251shows strong emission lines of [Oiii] and Hα+[Nii], but there isno evidence for line emission from the jet (detected in opticalcontinuum by Keel).

A search for environmental effects on the optical properties of galaxies in groups
Environmental density-related modifications of basic optical properties(luminosities, sizes, axial ratios, and colors) of galaxies belonging toGeller and Huchra's (1983) groups have been investigated. Remarkably, itis found that the broad maxima of the distributions of luminosities anddiameters of spirals and the whole corresponding distributions oflenticulars tend to move to lower values as one goes to groups of highcompactness, whereas the luminosity-diameter relationship of spiralstends to become flatter. No color and axial ratio differences betweengalaxies of high- and low-compactness groups have been detected.

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:小熊座
右阿森松:15h29m25.90s
赤纬:+82°35'01.0"
明显尺寸:0.646′ × 0.282′

目录:
适当名称   (Edit)
ICIC 1139
HYPERLEDA-IPGC 55236

→ 要求更多目录从vizier