The spectral signature of the cooling flow in Abell 478
The spectral signature of the cooling flow in Abell 478
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Abell 478 中冷却流的光谱特征
DOI：
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发表时间：
1992
期刊：
影响因子：
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通讯作者：
P. Thomas
中科院分区：
文献类型：
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作者：
R. Johnstone;A. Fabian;A. Edge;P. Thomas
我们给出了用Ginga LAC和Einstein SSS拍摄的Abell 478的x射线光谱。如果采用基于21厘米H I观测的星系吸收值，LAC数据设定了整个星系团质量沉积率的上限为~ 440 M⊙yr−1。SSS数据强烈要求吸收柱密度远远超过从银河系H .的21厘米观测值进行标度所期望的吸收柱密度。LAC、SSS和HRI的数据加在一起意味着质量沉积速率约为1000 M⊙yr−1，吸收柱密度为4.8×10 21 cm−2。
We present X-ray spectra of Abell 478 taken with the Ginga LAC and with the Einstein SSS. The LAC data set an upper limitof ∼440 M ⊙ yr −1 on the mass deposition rate throughout the whole cluster if a value for the galactic absorption based on 21-cm observations of H I is adopted. The SSS data strongly require an absorbing column density well in excess of that expected by scaling from 21-cm observations of galactic H I. Data from the LAC, SSS and HRI taken together imply a mass deposition rate of about 1000 M ⊙ yr −1 with an absorption column density ∼4.8×10 21 cm −2 .