J-Band Spectroscopy of the z = 5.74 Broad Absorption Line Quasar SDSSp J104433.04–012502.2
J-Band Spectroscopy of the z = 5.74 Broad Absorption Line Quasar SDSSp J104433.04–012502.2
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z = 5.74 宽吸收线类星体 SDSSp J104433.04–012502.2 的 J 波段光谱
DOI：
10.1086/324466
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
M. Strauss
中科院分区：
文献类型：
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作者：
R. Goodrich;R. Campbell;F. Chaffee;G. Hill;D. Sprayberry;W. Brandt;D. Schneider;S. Kaspi;X. Fan;J. Gunn;M. Strauss
我们使用 Keck II 上的近红外光谱仪 NIRSPEC 来获得中等分辨率 (R = 1540) 光谱，最终表明 z = 5.74 类星体 SDSSp J104433.04-012502.2 中的 C IV 发射线伴随着宽的蓝移 C IV 吸收。该线的“平衡指数”为 900 km s-1，相对于连续体的静止框架等效宽度为 13.1 ± 1.3 Å。这证实了它属于被称为“宽吸收线”（BAL）准恒星天体（QSO）的天体类别。 SDSSp J1044-0125 之前被认为是 BAL QSO，因为它的 UV 与 X 射线通量比大于大多数非 BAL QSO。 C IV 发射具有正常强度，这意味着其金属丰度与其他红移较低的 QSO 中发现的金属丰度相似。
We use NIRSPEC, a near-IR spectrometer on Keck II, to obtain moderate-resolution (R = 1540) spectroscopy that shows conclusively that the C IV emission line in the z = 5.74 quasar SDSSp J104433.04-012502.2 is accompanied by broad, blueshifted C IV absorption. The line has a "balnicity index" of 900 km s-1 and a rest-frame equivalent width of 13.1 ± 1.3 Å relative to the continuum. This confirms its membership in the class of objects called "broad absorption line" (BAL) quasi-stellar objects (QSOs). SDSSp J1044-0125 was previously suggested to be a BAL QSO based on its UV-to-X-ray flux ratio, which is larger than most non-BAL QSOs. The C IV emission is of normal strength, implying a metallicity similar to that found in other, lower redshift, QSOs.