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arXiv 1306.2323astro-ph.HEastro-ph.CO
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热的高能宇宙:星系团和星系群中的AGN反馈

The Hot and Energetic Universe: AGN feedback in galaxy clusters and groups

J. H. Croston, J. S. Sanders, S. Heinz, M. J. Hardcastle, I. Zhuravleva, L. Bîrzan, R. G. Bower, M. Brüggen, E. Churazov, A. C. Edge, S. Ettori, A. C. Fabian, A… 展开作者

J. H. Croston, J. S. Sanders, S. Heinz, M. J. Hardcastle, I. Zhuravleva, L. Bîrzan, R. G. Bower, M. Brüggen, E. Churazov, A. C. Edge, S. Ettori, A. C. Fabian, A. Finoguenov, J. Kaastra, M. Gaspari, M. Gitti, P. E. J. Nulsen, B. R. McNamara, E. Pointecouteau, T. J. Ponman, G. W. Pratt, D. A. Rafferty, T. H. Reiprich, D. Sijacki, D. M. Worrall, R. P. Kraft, I. McCarthy, M. Wise

摘要:

通过星系群和星系团中心的活动星系核(AGN)喷流的机械反馈是当前星系形成和星系团演化模型的重要组成部分。喷流反馈被认为是调节气体冷却,从而在最大质量的星系中形成恒星,但目前缺乏对这种反馈模式的强大物理理解。Athena+的大收集面积,出色的光谱分辨率和高空间分辨率将通过以下方式提供发展这种理解所需的突破性诊断能力:(1)首次对星系、星系团和星系团晕中吸收活动星系核喷流冲击的热气体进行了相关空间尺度的运动学测量,和(2)大大提高了在与射流、叶瓣和由它们产生的气体扰动相匹配的尺度上绘制热力学条件的能力。因此,Athena+将首次确定喷流能量如何在集团和集团气体中耗散和分布,以及反馈回路如何在集团/集团核心中运行以调节气体冷却和活动星系核燃料供应。雅典娜+还将坚定地建立强大的射电星系对重子演化的累积影响,从集团/团簇形成的时代到今天。

英文摘要:

Mechanical feedback via Active Galactic Nuclei (AGN) jets in the centres of galaxy groups and clusters is a crucial ingredient in current models of galaxy formation and cluster evolution. Jet feedback is believed to regulate gas cooling and thus star formation in the most massive galaxies, but a robust physical understanding of this feedback mode is currently lacking. The large collecting area, excellent spectral resolution and high spatial resolution of Athena+ will provide the breakthrough diagnostic ability necessary to develop this understanding, via: (1) the first kinematic measurements on relevant spatial scales of the hot gas in galaxy, group and cluster haloes as it absorbs the impact of AGN jets, and (2) vastly improved ability to map thermodynamic conditions on scales well-matched to the jets, lobes and gas disturbances produced by them. Athena+ will therefore determine for the first time how jet energy is dissipated and distributed in group and cluster gas, and how a feedback loop operates in group/cluster cores to regulate gas cooling and AGN fuelling. Athena+ will also establish firmly the cumulative impact of powerful radio galaxies on the evolution of baryons from the epoch of group/cluster formation to the present day.

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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