探索MKW 08中的多相介质：从中心活动星系到星系团尺度
Exploring the multiphase medium in MKW 08: from the central active galaxy up to cluster scales
摘要：
研究非冷核星系团中最亮星系团（BCG）日冕对理解BCG在星系团演化中的作用以及星系团中心区域自调节冷却和加热机制的激活具有重要意义。我们探讨了NCC星系团MKW 08和BCG日冕的团内介质（ICM）及其界面区域的X射线性质。最近和深档案钱德拉观测，我们详细研究了BCG日冕，并与档案XMM-牛顿观测，我们调查的BCG中央活动星系核（AGN）的影响。我们进行成像和光谱分析MKW 08档案XMM牛顿和钱德拉X射线观测。我们的光谱分析表明，存在一个中心活动星系核的幂律与光子指数$Γ$ ~ 1.8在其核心的BCG。虽然ICM并没有表现出一个星系团尺度的冷核，但BCG表现出一个小型的冷核，其特征是在r = 3 kpc时冷却时间短至6400万年。BCG日冕的等温性似乎有利于中央AGN作为气体加热的主要来源的机械反馈。这个小型冷核的气压分布表明，BCG日冕气体与更热、密度更低的ICM在一个接近恒压的界面内达到压力平衡，该界面在银河系中心由半径4 < r < 10 kpc界定。由于存在一个延伸到40 kpc的金属富集尾（Z ~ 0.5 - 0.9 Solar），BCG日冕似乎正在经历周围ICM的冲压压力剥离和/或与附近的星系IC 1042相互作用。
英文摘要：
The study of the brightest cluster galaxy (BCG) coronae embedded in noncool core (NCC) galaxy clusters is crucial to understand the BCG's role in galaxy cluster evolution as well as the activation of the self-regulated cooling and heating mechanism in the central regions of galaxy clusters. We explore the X-ray properties of the intracluster medium (ICM) of the NCC galaxy cluster MKW 08 and the BCG corona, along with their interface region. With recent and deep archival Chandra observations, we study the BCG corona in detail, and with archival XMM-Newton observations, we investigate the implications of the central active galactic nuclei (AGN) on the BCG. We carry out imaging and spectral analyses of MKW 08 with archival XMM-Newton and Chandra X-ray observations. Our spectral analysis suggests the presence of a central AGN by a power-law with a photon index of $Γ$ ~ 1.8 at the core of its BCG. Although the ICM does not exhibit a cluster scale cool core, the BCG manifests itself as a mini cool core characterized by a cooling time as short as 64 Myr at r = 3 kpc centered at the galaxy. The isothermality of the BCG corona seems to favor mechanical feedback from the central AGN as the major source of gas heating. The gas pressure profile of this mini cool core suggests that the BCG coronal gas reaches pressure equilibrium with the hotter and less dense ICM inside an interface of nearly constant pressure, delimited by radii 4 < r < 10 kpc at the galactic center. As revealed by the presence of a metal enriched tail (Z ~ 0.5 - 0.9 Solar) extending up to 40 kpc, the BCG corona seems to be experiencing ram-pressure stripping by the surrounding ICM and/or interacting with a nearby galaxy, IC 1042.}
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。
