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  

HD 202025


目录

图像

上传图像

DSS Images   Other Images


相关文章

Discovery of an Obscured Broad-Line Region in the High-Redshift Radio Galaxy MRC 2025-218
This Letter presents infrared spectra taken with the newly commissionednear-infrared spectrometer (NIRSPEC) on the Keck II telescope of thehigh-redshift radio galaxy MRC 2025-218 (z=2.63). These observationsrepresent the deepest infrared spectra of a radio galaxy to date andhave allowed for the detection of Hβ, [O III] λλ4959,5007, [O I] λ6300, Hα, [N II] λλ6548, 6583,and [S II] λλ6716, 6713. The Hα emission is verybroad (FWHM=9300 km s-1) and luminous (2.6x1044ergs s-1), and it is very comparable to the line widths andstrengths of radio-loud quasars at the same redshift. This stronglysupports active galactic nucleus unification models linking radiogalaxies and quasars, although we discuss some of the outstandingdifferences. The line [O III] λ5007 is extremely strong and hasextended emission with large relative velocities toward the nucleus. Wealso derive that if the extended emission is due to star formation, eachknot has a star formation rate comparable to a Lyman-break galaxy at thesame redshift.

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:摩羯座
右阿森松:21h14m01.79s
赤纬:-22°12'43.6"
视星:6.972
距离:139.082 天文距离
右阿森松适当运动:37.2
赤纬适当运动:-10.6
B-T magnitude:7.005
V-T magnitude:6.975

目录:
适当名称   (Edit)
HD 1989HD 202025
TYCHO-2 2000TYC 6359-1455-1
USNO-A2.0USNO-A2 0675-36248864
HIPHIP 104810

→ 要求更多目录从vizier