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Raining in MKW 3 s: A Chandra-MUSE Analysis of X-Ray Cold Filaments around 3CR 318.1
The Astrophysical Journal Letters ( IF 8.8 ) Pub Date : 2021-05-10 , DOI: 10.3847/2041-8213/abf6db
A. Jimenez-Gallardo 1, 2, 3, 4 , F. Massaro 1, 3, 4, 5 , B. Balmaverde 4 , A. Paggi 1, 3, 4 , A. Capetti 4 , W. R. Forman 6 , R. P. Kraft 6 , R. D. Baldi 7, 8 , V. H. Mahatma 9 , C. Mazzucchelli 2 , V. Missaglia 1, 3, 4 , F. Ricci 10, 11 , G. Venturi 12, 13 , S. A. Baum 14 , E. Liuzzo 7 , C. P. O’Dea 14 , M. A. Prieto 15, 16 , H. J. A. Rttgering 17 , E. Sani 2 , W. B. Sparks 18, 19 , G. R. Tremblay 6 , R. J. van Weeren 17 , B. J. Wilkes 6 , J. J. Harwood 20 , P. Mazzotta 21 , J. Kuraszkiewicz 6
Affiliation  

We present the analysis of X-ray and optical observations of gas filaments observed in the radio source 3CR 318.1, associated with NGC 5920, the brightest cluster galaxy (BCG) of MKW 3 s, a nearby cool core galaxy cluster. This work is one of the first X-ray and optical analyses of filaments in cool core clusters carried out using MUSE observations. We aim at identifying the main excitation processes responsible for the emission arising from these filaments. We complemented the optical VLT/MUSE observations, tracing the colder gas phase, with X-ray Chandra observations of the hotter highly ionized gas phase. Using the MUSE observations, we studied the emission line intensity ratios along the filaments to constrain the physical processes driving the excitation, and, using the Chandra observations, we carried out a spectral analysis of the gas along these filaments. We found a spatial association between the X-ray and optical morphology of these filaments, which are colder and have lower metal abundance than the surrounding intracluster medium (ICM), as already seen in other BCGs. Comparing with previous results from the literature for other BCGs, we propose that the excitation process that is most likely responsible for these filaments emission is a combination of star formation and shocks, with a likely contribution from self-ionizing, cooling ICM. Additionally, we conclude that the filaments most likely originated from AGN-driven outflows in the direction of the radio jet.



中文翻译:

MKW 3 s 下雨:3CR 318.1 周围 X 射线冷灯丝的 Chandra-MUSE 分析

我们展示了在射电源 3CR 318.1 中观察到的气体细丝的 X 射线和光学观测分析,与 NGC 5920 相关,它是 MKW 3 s 的最亮星团星系 (BCG),它是附近的冷核心星系团。这项工作是使用 MUSE 观测对冷核心簇中的细丝进行的首批 X 射线和光学分析之一。我们的目标是确定导致这些细丝产生的发射的主要激发过程。我们补充了光学 VLT/MUSE 观测,追踪较冷的气相,以及较热的高度电离气相的 X 射线钱德拉观测。使用 MUSE 观测,我们研究了沿灯丝的发射线强度比,以限制驱动激发的物理过程,并使用 Chandra 观测,我们对沿着这些细丝的气体进行了光谱分析。我们发现这些细丝的 X 射线和光学形态之间存在空间关联,这些细丝比周围的簇内介质 (ICM) 更冷且金属丰度更低,正如在其他 BCG 中已经看到的那样。与其他 BCG 文献中的先前结果相比,我们提出最有可能导致这些细丝发射的激发过程是恒星形成和冲击的组合,可能来自自电离、冷却 ICM 的贡献。此外,我们得出结论,细丝最有可能源自 AGN 驱动的射流方向的外流。正如在其他 BCG 中已经看到的那样,它们比周围的簇内介质 (ICM) 更冷且金属丰度更低。与其他 BCG 文献中的先前结果相比,我们提出最有可能导致这些细丝发射的激发过程是恒星形成和冲击的组合,可能来自自电离、冷却 ICM 的贡献。此外,我们得出结论,细丝最有可能源自 AGN 驱动的射流方向的外流。正如在其他 BCG 中已经看到的那样,它们比周围的簇内介质 (ICM) 更冷且金属丰度更低。与其他 BCG 文献中的先前结果相比,我们提出最有可能导致这些细丝发射的激发过程是恒星形成和冲击的组合,可能来自自电离、冷却 ICM 的贡献。此外,我们得出结论,细丝最有可能源自 AGN 驱动的射流方向的外流。冷却 ICM。此外,我们得出结论,细丝最有可能源自 AGN 驱动的射流方向的外流。冷却 ICM。此外,我们得出结论,细丝最有可能源自 AGN 驱动的射流方向的外流。

更新日期:2021-05-10
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