A deep Chandra observation of the poor cluster AWM 4 - II. The role of the radio jets in enriching the intracluster medium
A deep Chandra observation of the poor cluster AWM 4 - II. The role of the radio jets in enriching the intracluster medium
复制标题
钱德拉对贫星团 AWM 4 - II 的深度观测。
DOI：
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
Somak Raychaudhury
中科院分区：
文献类型：
--
作者：
E. O’Sullivan;S. Giacintucci;L. David;J. Vrtilek;Somak Raychaudhury
我们利用贫星团AWM4的Chandra观测绘制了星系团内介质的温度和丰度图，以考察中心射电星系对其环境的影响。虽然星系团的核心通常被浓缩到接近太阳的丰度，但我们发现了与射电喷流相关的超太阳丰度的证据，从中心优势星系NGC6051的核心沿着其短轴延伸了∼35kpc。我们得出的结论是，在射电源的作用下，浓缩的气体已经被输送出了中央星系。我们估算了夹带气体中铁的超额质量为∼1.4×106M⊙，发现在活动星系核爆发的时间尺度内，可以在NGC6051的核心产生铁。将这种气体输送到其当前位置所需的能量为∼4.5x1057erg，占估计的AGN总机械能输出的很大一部分，尽管这一估计取决于抬升的气体的浓缩程度。更大的近太阳丰度区域也与从NGC 6051向外混合的金属在更长时间尺度上的富集区是兼容的。
We use a Chandra observation of the poor cluster AWM 4 to map the temperature and abundance of the intracluster medium, so as to examine the influence of the central radio galaxy on its environment. While the cluster core is generally enriched to near-solar abundances, we find evidence of supersolar abundances correlated with the radio jets, extending ∼35 kpc from the core of the central dominant galaxy NGC 6051 along its minor-axis. We conclude that the enriched gas has been transported out of the central galaxy through the action of the radio source. We estimate the excess mass of iron in the entrained gas to be ∼1.4 x 10 6 M ⊙ and find that this can be produced in the core of NGC 6051 within the time-scale of the active galactic nucleus (AGN) outburst. The energy required to transport this gas to its current location is ∼4.5 × 10 57 erg, a significant fraction of the estimated total mechanical energy output of the AGN, though this estimate is dependent on the degree of enrichment of the uplifted gas. The larger near-solar abundance region is also compatible with enrichment by metals mixed outwards from NGC 6051 over a much longer time-scale.
DOI：
10.1111/j.1365-2966.2006.11300.x
发表时间：
2006-11
影响因子：
4.8
作者：
E. Roediger;M. Brueggen;P. Rebusco;H. Boehringer;E. Churazov;International University Bremen;Mpa Garching;M. Garching;Space Research Institute Moscow
通讯作者：
E. Roediger;M. Brueggen;P. Rebusco;H. Boehringer;E. Churazov;International University Bremen;Mpa Garching;M. Garching;Space Research Institute Moscow
影响因子：
6.5
作者：
A. Simionescu;N. Werner;A. Finoguenov;H. Böhringer;M. Brüggen
通讯作者：
A. Simionescu;N. Werner;A. Finoguenov;H. Böhringer;M. Brüggen
影响因子：
6.5
作者：
A. Simionescu;N. Werner;H. Böhringer;J. Kaastra;A. Finoguenov;M. Brüggen;P. Nulsen
通讯作者：
A. Simionescu;N. Werner;H. Böhringer;J. Kaastra;A. Finoguenov;M. Brüggen;P. Nulsen