Distribution of Doppler Redshifts of Associated Absorbers of SDSS Quasars

Distribution of Doppler Redshifts of Associated Absorbers of SDSS Quasars
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SDSS类星体相关吸收体的多普勒红移分布

DOI:
10.1007/s12036-013-9189-1
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发表时间:
2013-12
影响因子:
1.1
通讯作者:
Chen Zhi-Fu
Chen Zhi-Fu
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
Pan Cai-Juan;Chen Zhi-Fu

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本文分析了SDSS DR 7类星体中Mg Ⅱ吸收体的多普勒红移。我们发现多普勒红移的分布中可能有三个高斯分量。第一个高斯分量的峰值位于zDopp = − 0.0074处,可能来自于在类星体喷流附近观测到的流出历史的吸收体。第二个高斯分量的峰值位于zDopp = − 0.0017处,可能来自在远离类星体喷流的方向上观测到的具有流出历史的吸收体。而第三个高斯分量的峰值位于zDopp =-0.0004处,可能是吸收体相对于类星体的随机运动引起的。
Doppler redshifts of a sample of Mg II associated absorbers of SDSS DR7 quasars are analysed. We find that there might be three Gaussian components in the distribution of the Doppler redshift. The first Gaussian component, with the peak being located atzDopp= − 0.0074, probably arises from absorbers with outflow histories observed in the direction close to jets of quasars. The second Gaussian component, with the peak being located atzDopp= − 0.0017, possibly arises from absorbers with outflow histories observed in the direction far away from jets of quasars. Whereas, the third Gaussian component, with the peak being located atzDopp= − 0.0004, might arise from the random motion of absorbers with respect to quasars.
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