Jet emission in NGC 1052 at radio, optical, and X-ray frequencies
Jet emission in NGC 1052 at radio, optical, and X-ray frequencies
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NGC 1052 中无线电、光学和 X 射线频率的射流发射
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
J. Zensus
中科院分区：
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作者：
M. Kadler;J. Kerp;E. Ros;H. Falcke;R. Pogge;J. Zensus
我们提出了一个综合的无线电，光学和X射线研究附近的LINER星系NGC 1052。来自NGC 1052的短（2.3 ks）CHANNEL观测的数据显示存在各种与喷流相关的X射线发射区域，明亮的致密核心和喷流结构中未解决的结，以及星系内部与射电同步加速器喷流发射对准的扩展发射区域。扩展的X射线发射光谱可以用一个热模型来拟合，其值为kT =（0.4{-}0.5）$ keV，而致密核的光谱非常平坦，最好用吸收的幂律来近似，其值为$N_{
m H} =（0.6{-}0.8） 10.第10章，
m cm^{-2}}$。我们比较的无线电结构的光学“结构图”从哈勃太空望远镜（HST）的观测，并找到一个很好的位置之间的相关性无线电喷流和光发射锥。在所有三个频段都可以看到明亮、紧凑的喷流结构结，其光谱与同步辐射不一致。
We present a combined radio, optical, and X-ray study of the nearby LINER galaxy NGC 1052. Data from a short (2.3 ks) CHANDRA observation of NGC 1052 reveal the presence of various jet-related X-ray emitting regions, a bright compact core and unresolved knots in the jet structure as well as an extended emitting region inside the galaxy well aligned with the radio synchrotron jet-emission. The spectrum of the extended X-ray emission can best be fitted with a thermal model with $kT = (0.4{-}0.5)$ keV, while the compact core exhibits a very flat spectrum, best approximated by an absorbed power-law with $N_{
m H} = (0.6{-}0.8) imes 10^{22},{
m cm^{-2}}$. We compare the radio structure to an optical “structure map” from a Hubble Space Telescope ( HST ) observation and find a good positional correlation between the radio jet and the optical emission cone. Bright, compact knots in the jet structure are visible in all three frequency bands whose spectrum is inconsistent with synchrotron emission.