Ripping apart at the seams: the network of stripped gas surrounding M86
Ripping apart at the seams: the network of stripped gas surrounding M86
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DOI：
10.1093/mnras/stt060
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发表时间：
2012-12
影响因子：
4.8
通讯作者：
S. Ehlert;S. Ehlert;Norbert Werner;Norbert Werner;A. Simionescu;A. Simionescu;Steven W. Allen;Steven W. Allen;J. Kenney;E. Million;A. Finoguenov;A. Finoguenov
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文献类型：
--
作者：
S. Ehlert;S. Ehlert;Norbert Werner;Norbert Werner;A. Simionescu;A. Simionescu;Steven W. Allen;Steven W. Allen;J. Kenney;E. Million;A. Finoguenov;A. Finoguenov
本文利用XMM-牛顿方法对室女座星系团M86、M84、NGC 4338和NGC 4438的五个独立点进行了新的研究。我们的观测允许对每个星系的温度和金属丰度结构以及这些星系之间的整个0.1 °区域的沿着进行可靠的测量。当结合多波长观测时，这些数据表明，所有这四个星系都正在经历由群内介质（ICM）的冲压压力剥离。然而，星系尾部的剥离气体与ICM相互作用的方式却截然不同。与之前的观测结果一致，M86被观测到有一条101 keV的气体长尾，向西北方向延伸，距离为100-150 kpc。然而，在M86以东的扰动螺旋星系NGC 4438的方向上，观测到了一个新的0.6 keV的热辐射点。这个区域在空间上与Hα发射的细丝一致，可能起源于两个星系之间最近的碰撞。我们还解决了剥离的0.6 keV的气体的热力学结构的南部M84，这表明该星系正在经历活动星系核的反馈和冲压压力剥离同时进行。这四个位置的剥离X射线气体表明，冲压压力剥离的性质可以显着不同的网站。
We present a new study of the Virgo Cluster galaxies M86, M84, NGC 4338 and NGC 4438 using a mosaic of five separate pointings with XMM–Newton. Our observations allow for robust measurements of the temperature and metallicity structure of each galaxy along with the entire ∼1° region between these galaxies. When combined with multiwavelength observations, the data suggest that all four of these galaxies are undergoing ram pressure stripping by the intracluster medium (ICM). The manner in which the stripped gas trailing the galaxies interacts with the ICM, however, is observably distinct. Consistent with previous observations, M86 is observed to have a long tail of ∼1 keV gas trailing to the north-west for distances of ∼100–150 kpc. However, a new site of ∼0.6 keV thermal emission is observed to span to the east of M86 in the direction of the disturbed spiral galaxy NGC 4438. This region is spatially coincident with filaments of Hα emission, likely originating in a recent collision between the two galaxies. We also resolve the thermodynamic structure of stripped ∼0.6 keV gas to the south of M84, suggesting that this galaxy is undergoing both AGN feedback and ram pressure stripping simultaneously. These four sites of stripped X-ray gas demonstrate that the nature of ram pressure stripping can vary significantly from site to site.