Redshifted H i and OH absorption in radio galaxies and quasars

Redshifted H i and OH absorption in radio galaxies and quasars
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射电星系和类星体中红移的 H i 和 OH 吸收

DOI：
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发表时间：
2010
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通讯作者：
G. Langston
G. Langston
中科院分区：
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文献类型：
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作者：
S. Curran;M. Whiting;M. Murphy;J. Webb;C. Bignell;A. Polatidis;T. Wiklind;P. Francis;G. Langston

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通过对射电星系和类星体样本的HI21 cm和OH18 cm红移吸收的测量，我们在10个源中的3个中检测到了HI，在获得有用数据的14个源中没有一个检测到OH。正如我们最近的结果所预期的那样，所有21厘米的探测都发生在L(UV)1023W赫兹-1的紫外线(UV)连续亮度源中。我们的21厘米探测与之前发表的探测相结合，给出了在俄亥俄州搜索到和未检测到的总共8个(相关的和介入的)HI吸收源。使用探测到的21厘米谱线强度来归一化极限，我们发现这八个源中只有两个可能在OH中被搜索得足够深，尽管这些源是边缘的。
From a survey for the redshifted H i 21-cm and OH 18-cm absorption in the hosts of a sample of radio galaxies and quasars, we detect H i in three of the 10 and OH in none of the 14 sources for which useful data were obtained. As expected from our recent result, all of the 21-cm detections occur in sources with ultraviolet (UV) continuum luminosities of L(UV) 1023 W Hz-1. Our 21-cm detections in combination with those previously published give a total of eight (associated and intervening) H i-absorbing sources searched and undetected in OH. Using the detected 21-cm line strengths to normalize the limits, we find that only two of these eight sources may have been searched sufficiently deeply in OH, even though these are marginal.