它是个位于英仙座星系群中心的活动星系。
It is an active galaxy lying at the centre of the Perseus Cluster of galaxies.
第二个活动星系核是如何保持隐藏了这么久？
有一小部分被称做活动星系的星系放射出巨大的能量。
A small percentage of galaxies called active galaxies emit tremendous amounts of energy.
星系通常分为正常星系(NG)与活动星系(AG)两类。
Galaxies can be divided into two classes: normal galaxy (NG) and active galaxy (AG).
它们也没有把活动星系同那些黑洞活动相对平静的星系作比较。
They also didn't compare active galaxies to those with quiet black holes.
活动星系核的光学谱变化与光变时标之间是否存在某种关系？
AGN changes in the optical spectra and light changes between standard Is there some relationship?
“我们没有看到很多双活动星系核，所以我们求助于钱德拉”。
We weren't seeing many double AGN, so we turned to Chandra for help.
在这块微小的区域，智慧号发现了130个发光的黑洞或活动星系核。
In just that tiny region, WISE found about 130 glowing black holes, or active galactic nuclei.
结果表明：这两种模型是定性解释活动星系核光学波段光变的合理模型。
The results show that these two models can qualitatively explain the AGN variability in the optical band.
这显示在二进制活动星系核的定位在高x射线能量高清晰度观测至关重要。
This highlights the critical importance of high-resolution observations at high X-ray energies in locating binary AGN.
本篇论文主要对射电强活动星系核的中央引擎和射电喷流的性质进行了一些研究。
In this thesis, we present the studies of the central engine and radio jets in radio-loud Active Galaxies Nuclei.
探索活动星系的快速光变，是研究星系中心致密核结构及辐射机制的强有力手段。
Searche for rapid variability in the flux from active galaxies has the Promise of being a very powerful tool for understanding their emission mechanisms.
我的研究兴趣主要包括类星体与活动星系核、超大质量黑洞以及它们的吸积物理。
My research interests mainly include quasars and active galactic nuclei (AGNs), supermassive black holes and their accretion physics.
这些讨论表明，活动星系核的短时标光变特征对厚吸积盘模型提供了强有力的支持。
The conclusion is: the short term variability behavior provides a strong support to the thick accretion disk model of AGN.
从宇宙演化的角度来看，类星体的光变随着宇宙时愈演愈烈，最后与活动星系相接。
From the viewpoint of cosmological evolution it seems that the optical variation of QSOs becomes more violent with the cosmological time, and finally it connects itself with that of active galaxies.
这项调查是敏感的活动星系核高达650亿光年远，并发现了先前未知的系统几十人。
The survey is sensitive to AGN up to 650 million light-years away and has uncovered dozens of previously unrecognized systems.
在冷核星系团中发现了许多中央活动星系核（AGN）活动所造成的X射线空洞，等。
In some cool core clusters, re-searchers have found central X-ray cavities that are produced by AGN activity.
但问题是，这仅仅是M 87过去的行为还是它将会发生在每个活动星系核或者单个喷流中？
But the question is, does this happen to every single jet or active nucleus, or are we seeing some odd behavior from M87?
大部分星系都是如此，但有一些粗暴的邻居的黑洞让它们以活动星系核(agn)的形式对外散布伤害。
Most galaxies are like that, as it happens, but there are a few rougher neighborhoods where the black holes cause their share of mayhem in the form of active galactic nuclei (AGNs).
马尔卡良双739的活动星系核是第二已知的最近，无论是在彼此的距离上，从地球的距离。
The dual AGN of Markarian 739 is the second-closest known, both in terms of distance from one another and distance from Earth.
他们的研究方法表明，用其他光谱方法测量的遥远活动星系核的黑洞质量大概夸大了2-10倍。
Their method indicates that the mass of distant AGN black holes as estimated by other spectral methods is two to 10 times too high.
活动星系核的高能辐射机制研究对于揭示其结构和演化特征以及中央驱动之谜具有极其重要的意义。
The high energy radiation mechanism research of active galactic nuclei is a key to understanding their structure, evolution features and origin of central drive.
活动星系从它们的核部发出明亮的光芒，在那里，气体被加热并压缩成一个漩涡状的圆盘，漩涡的中心便是黑洞。
Active galaxies give off bright radiation from their cores, where gas heats up as it is compressed into a swirling accretion disk encircling the black hole.
并对两派观点争论的焦点问题进行了详细的阐述。这个焦点问题与活动星系核的X射线辐射紧密相关。
We discuss in detail on the focus between the arguments of the above two basic views which are very closely related to the X-ray radiation of active galactic nuclei.
不过现在NASA的雨燕卫星在硬（高能）X射线的巡天新成果可靠地显示活动星系核与星系合并的紧密联系。
New results from a premier sky survey by NASA's Swift satellite at hard (energetic) X-ray energies now solidly show a strong association of AGN with merging galaxies, though.
光变是活动星系核（AGN）的共同特征， 光变规律的研究已成为人类探索活动星系核物理的有力手段。
Optical variability is a common property of AGNs, Which provides a potentially powerful tool to probe the physics of AGNs.
光变是活动星系核（AGN）的共同特征， 光变规律的研究已成为人类探索活动星系核物理的有力手段。
Optical variability is a common property of AGNs, Which provides a potentially powerful tool to probe the physics of AGNs.
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