Infrared Spectroscopy of the Gravitationally Lensed Quasar B1422+231: Mg II λ2798 and Fe II Emission from the Broad-Line Gas at z = 3.62
Infrared Spectroscopy of the Gravitationally Lensed Quasar B1422+231: Mg II λ2798 and Fe II Emission from the Broad-Line Gas at z = 3.62
复制标题
引力透镜类星体 B1422+231 的红外光谱：z = 3.62 处宽线气体的 Mg II λ2798 和 Fe II 发射
DOI：
10.1086/310315
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发表时间：
1996
期刊：
影响因子：
--
通讯作者：
N. Arimoto
中科院分区：
文献类型：
--
作者：
K. Kawara;T. Murayama;Y. Taniguchi;N. Arimoto
本文给出了z = 3.62的引力透镜平谱射电噪类星体B1422+231系统的静止坐标系紫外光（2000-5300 nm）谱。该光谱与大型明亮类星体巡天（LBQS）合成光谱（弗朗西斯等人）相似，这表明在0 < z < 3.6的一些类星体中没有显著的紫外光谱演化。Fe II（UV +光学）/Mg II λ2798的通量比为12.2 ± 3.9，与本工作中分析的z = 1-2的类星体的LBQS复合光谱的8.9和Wills，Netzer和Wills分析的z = 0.15-0.63的类星体的7.8 ± 2.6相当。由此得出结论，B1422+231宿主星系中的大多数恒星形成的时间（~1.5 Gyr）比z = 3.6早得多。还报道了在z = 3以上的类星体中首次探测到[O III] λ5007。
The rest-frame UV-optical (2000-5300 Å) spectrum of the gravitationally lensed flat-spectrum radio-loud quasar B1422+231 system at z = 3.62 is presented. The spectrum is similar to the Large Bright Quasar Survey (LBQS) composite spectrum (Francis et al.), which indicates no significant UV-optical spectral evolution in some quasars at 0 < z < 3.6. The Fe II(UV + optical)/Mg II λ2798 flux ratio is 12.2 ± 3.9, which is comparable to 8.9 for the LBQS composite spectrum of quasars at z = 1-2 analyzed in this work, and 7.8 ± 2.6 for quasars at z = 0.15-0.63 analyzed by Wills, Netzer, & Wills. It is concluded that the majority of stars in the host galaxy of B1422+231 have formed much earlier (~1.5 Gyr) than z = 3.6. The first detection of [O III] λ5007 in a quasar beyond z = 3 is also reported.