Deep spectroscopy of distant 3CR radio galaxies: the data
Deep spectroscopy of distant 3CR radio galaxies: the data
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遥远 3CR 射电星系的深光谱：数据
DOI：
10.1046/j.1365-8711.2000.03027.x
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发表时间：
1999
影响因子：
4.8
通讯作者：
M. Longair
中科院分区：
文献类型：
--
作者：
P. Best;H. Rottgering;M. Longair
摘要：本文介绍了14个3CR射电星系的深长缝光谱数据，这些星系的红移为z， 1，之前使用哈勃太空望远镜、甚大阵列和英国红外望远镜（UKIRT）进行了详细的研究。对[O ii] 3727发射线结构进行了5a光谱分辨率的分析，得出了发射线气体的运动特性。与之前的低分辨率研究一致，我们看到了各种各样的运动学，从与平均旋转运动一致的气体到速度弥散超过1000 km / s的复杂结构。这些数据证实了在3C 265中存在高速气体组分，在3C 356和3C 441中存在分离的发射在线系统，并首次表明3C 324中心区域的发射在线气体由两个不同的运动组分组成。发射线通量和连续辐射的颜色被确定到前所未有的低观测波长，1,3500 A，足够短，任何演化恒星群的贡献都可以忽略不计。随附的一篇论文研究了样品中发射比和速度结构的变化，并得出了关于这些星系电离和运动学起源的结论。
ABSTRA C T Deep long-slit spectroscopic data are presented for a sample of 14 3CR radio galaxies at redshift z , 1, previously studied in detail using the Hubble Space Telescope, the Very Large Array, and the UK Infrared Telescope (UKIRT). Analysis of the [O ii] 3727 emission-line structures at ,5 A spectral resolution is carried out to derive the kinematic properties of the emission-line gas. In line with previous lower resolution studies, a wide variety of kinematics are seen, from gas consistent with a mean rotational motion through to complex structures with velocity dispersions exceeding 1000 km s 21 . The data confirm the presence of a high-velocity gas component in 3C 265 and detached emission-line systems in 3C 356 and 3C 441, and show for the first time that the emission-line gas in the central regions of 3C 324 is composed of two kinematically distinct components. Emission-line fluxes and the colour of the continuum emission are determined down to unprecedentedly low observed wavelengths, l , 3500 A, sufficiently short that any contribution of an evolved stellar population is negligible. An accompanying paper investigates the variation in the emissionline ratios and velocity structures within the sample, and draws conclusions as to the origin of the ionization and kinematics of these galaxies.