arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2001.00506astro-ph.HEastro-ph.GA
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FR中的FR反馈II galaxy 3C 220.1

AGN feedback in the FR II galaxy 3C 220.1

Wenhao Liu, Ming Sun, Paul E. J. Nulsen, Diana M. Worrall, Mark Birkinshaw, Craig Sarazin, William R. Forman, Christine Jones, Chong Ge

摘要:

我们目前的结果从深(174千兆赫)钱德拉观测FR-II射电星系3C 220. 1,中央最亮的星系团(BCG)的一个$kT \sim$ 4千电子伏的集群在$z=0.61$。在$\sim$ 35 kpc半径处,热团簇介质的温度从$\sim5.9$ keV下降到$\sim3.9$ keV,而在较小半径处的温度可能显著更低。活动星系核(AGN)的X射线辐射亮度超过整个星系团,辐射光度为$2.0\times10^{46}$ erg s $^{-1}$($\sim10$为爱丁顿率的%)。该系统显示了一对潜在的X射线空腔$\sim35$ kpc的东部和西部的核。用不同的方法估算了腔功率在$1.0\times10^{44}$ erg s $^{-1}$和$1.7\times10^{45}$ erg s $^{-1}$的范围内。射电叶中的X射线增强可能是由于逆康普顿发射,总光度为2-10 keV的$\sim8.0\times10^{42}$ erg s $^{-1}$。我们比较了3C 220.1与其他星系团的BCGs,包括天鹅座A,因为在富星系团中很少有BCGs托管FR-II星系。我们还总结了不同方法对FR-II星系喷流功率的研究。比较表明,FR-II星系的空腔功率可能低估了喷流功率。3C 220.1的性质表明它正处于类星体模反馈到射电模反馈的过渡阶段。

英文摘要:

We present results from a deep (174 ks) Chandra observation of the FR-II radio galaxy 3C 220.1, the central brightest cluster galaxy (BCG) of a $kT \sim$ 4 keV cluster at $z=0.61$. The temperature of the hot cluster medium drops from $\sim5.9$ keV to $\sim3.9$ keV at $\sim$ 35 kpc radius, while the temperature at smaller radii may be substantially lower. The central active galactic nucleus (AGN) outshines the whole cluster in X-rays, with a bolometric luminosity of $2.0\times10^{46}$ erg s$^{-1}$ ($\sim10$% of the Eddington rate). The system shows a pair of potential X-ray cavities $\sim35$ kpc east and west of the nucleus. The cavity power is estimated within the range of $1.0\times10^{44}$ erg s$^{-1}$ and $1.7\times10^{45}$ erg s$^{-1}$, from different methods. The X-ray enhancements in the radio lobes could be due to inverse Compton emission, with a total 2-10 keV luminosity of $\sim8.0\times10^{42}$ erg s$^{-1}$. We compare 3C 220.1 with other cluster BCGs, including Cygnus A, as there are few BCGs in rich clusters hosting an FR-II galaxy. We also summarize the jet power of FR-II galaxies from different methods. The comparison suggests that the cavity power of FR-II galaxies likely under-estimates the jet power. The properties of 3C 220.1 suggest that it is at the transition stage from quasar-mode feedback to radio-mode feedback.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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