Long-slit optical spectroscopy of emission-line nebulae in radio galaxies - The data
Long-slit optical spectroscopy of emission-line nebulae in radio galaxies - The data
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射电星系中发射线星云的长缝光谱 - 数据
DOI：
10.1086/191504
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发表时间：
1990
影响因子：
8.7
通讯作者：
W. Breugel
中科院分区：
文献类型：
--
作者：
S. Baum;T. Heckman;W. Breugel
结果上提出了一个广泛的计划，长缝光谱的扩展发射线区域周围的19个射电星系。测量，在多个位置的角度进行，获得了与里奇克雷蒂安摄谱仪对NOAO的4米马约尔望远镜在基特峰。在一般情况下，没有强梯度的H-α禁止N II线被发现在一个源。在某些来源中，气体似乎围绕星系核旋转，测量的旋转速度从100到325公里/秒不等。通常，旋转曲线相对于核谱线发射气体似乎是不对称的，相对于核气体显示出大约60 km/sec的偏移。在其他来源中，没有发现靠近核发射线的气体旋转的证据，但是更远的气体的速度在核的一侧是正的，而在另一侧是负的。参考文献12篇。
Results are presented on an extensive program of long-slit spectroscopy of the extended emission-line regions around 19 radio galaxies. Measurements, carried out at multiple position angles, were obtained with the Ritchey-Chretien spectrograph on NOAO's 4-m Mayall telescope at Kitt Peak. In general, no strong gradients in the H-alpha to the forbidden N II line were found within a source. In some sources, the gas appeared to be in rotation about the galaxy nucleus, with measured rotational velocities ranging from 100 to 325 km/sec. Frequently, the rotation curves appeared to be asymmetrically situated with respect to the nuclear line-emitting gas, showing offsets of about 60 km/sec, with respect to the nuclear gas. In other sources no evidence for rotation was found for the near nuclear emission-line gas, but the velocities of the gas farther out were positive on one side of the nucleus and negative on the other. 12 refs.