Accurate redshifts and classifications for 110 radio-loud active galactic nuclei

被引:61
作者
Eracleous, M [1 ]
Halpern, JP
机构
[1] Penn State Univ, Dept Astron & Astrophys, Davey Lab 525, University Pk, PA 16803 USA
[2] Columbia Univ, Dept Astron, New York, NY 10027 USA
关键词
galaxies : active; galaxies : distances and redshifts; galaxies : nuclei;
D O I
10.1086/379823
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We report accurate redshifts of 110 active galaxies ( mostly radio-loud objects at z < 0.4) observed in the course of a survey to find broad, double-peaked emission lines. These redshifts are measured from the narrow emission lines of these objects and are accurate to at least one part in 10(4). For each object we determine a redshift from high- and low-ionization lines separately, as well as an average redshift from all the available lines. We find that in about 15% of cases, the low-ionization lines yield a slightly higher redshift than the high- ionization lines; the average redshift difference amounts to a velocity difference of approximately 80 km s(-1). In addition to the redshift measurements we also report revised redshifts for two objects as well as new classifications for three narrow-line objects.
引用
收藏
页码:181 / 186
页数:6
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