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- What are quasars and active galactic nuclei? 甚麽是类星体和活跃星系核?
- The satisfactory performance for classification and knowledge discovery has been obtained by the proposed novel classifier over active galactic nucleus(AGNs) and active galaxies(AGs) data. 通过对活动星系与活动星系核实验表明,该方法无论对分类还是对知识发现都是非常有效的。
- On the other hand,galaxy-mass black holes are found in Active Galactic Nuclei (AGN). 另一种有星系质量大小的黑洞常发现存在于活跃的星系核心(AGN)。
- Active galactic nuclei, or AGN, are peculiar galaxies which have energetic phenomena in the central regions. 活动星系核是中心区域有大能量辐射的一类特殊的星系。
- On the other hand, galaxy-mass black holes are found in Active Galactic Nuclei (AGN). 另一种有星系质量大小的黑洞常发现存在于活跃的星系核心(agn)。
- Further chapters give extensive treatment of accretion in active galactic nuclei, and describe thick accretion discs. 更进一步的章给广泛的处理在活跃的银河系的原子核方面的增大,并且描述厚的增大光碟。
- Candidates for more massive black holes were first provided by the active galactic nuclei and quasars, discovered by radioastronomers in the1960 s. 活跃的银河核和类星体首先提供了更多质量庞大的黑洞候选者,在1960年无线天文学家发现了它们。
- The existence of black holes in the universe is well supported by astronomical observation, particularly from studying supernovae and X-ray emissions from active galactic nuclei. 天文学观察很好地支持了宇宙中黑洞存在,特别从研究来自活跃的银河核心超新星和X光辐射。
- Since the first extragalactic H2O megamaser source toward the Active Galactic Nuclei NGC 4945 was discovered, 19 sources have been found. 自从在活动星系核NGC 4945的视线方向上发现第一个河外 H2O超脉泽源以来,迄今为止已发现T 19个河外H2O超脉泽源。
- This is because a lot of quasi-periodic variations in X-ray binaries and active galactic nuclei are believed to be related to the instabilities of the disk. 这是因为许多X射线双星和活动星系核的周期性光变与盘的不稳定性密切相关。
- He has worked in fields ranging from star formation to active galactic nuclei and is now chair of the astronomy department at the University of Washington. 他的研究範围广泛,从恒星的形成至活跃星系核均有涉猎,目前担任美国华盛顿大学天文系系主任。
- In the same way, ultraviolet photons from accretion disks around white dwarfs and in active galactic nuclei or quasars may also accelerate winds from the disk . 同样地,来自白矮星、跃星系核或类星体吸积盘的紫外光光子,或许也能够加速从圆盘吹出的风。
- In the same way, ultraviolet photons from accretion disks around white dwarfs and in active galactic nuclei or quasars may also accelerate winds from the disk. 同样地,来自白矮星、跃星系核或类星体吸积盘的紫外光光子,或许也能够加速从圆盘吹出的风。
- Accretion Power in Astrophysics examines accretion as a source of energy in both binary star systems containing compact objects, and in active galactic nuclei. 在天体物理学方面的增大能力检查增大作为在包含小型物体的两种二进制的明星中心制里的能源,和在活跃的银河系的原子核里。
- The study of active galactic nuclei (AGN) is one of the most active branches in the field of astrophysics.This thesis gives a investigation on the jet precession of AGN. 活动星系核研究领域是天文学最活跃的分支之一,本文对活动星系核喷流的进动做了一点探讨。
- Surprisingly, the results indicate that most of the energy released by the infalling gas goes, not into an outpouring of light as is observed in many active galactic nuclei,but into jets of high-energy particles. 令人吃惊的是,结果表明,与大多数活动星系核不同,下落气体释放的大部分能量并没有作为光辐射倾泻而出,却是注入到了高能粒子喷流中。
- Using NASA's Chandra X-ray Observatory, astronomers tallied the number of rapidly growing supermassive black holes, called active galactic nuclei, or AGN, in two populations of galaxy clusters. 一项最新研究显示,年轻的星系团中特大质量的黑洞就象贪吃的水虎鱼一样,吞噬大量的气体,直到燃料所剩无几,然后渐渐地消失。
- ABSTRACT As a powerful and attractive theoretical model, accretion disks (AD) are widely believed to be sources of high-energy radiation for X-ray binaries and active galactic nuclei. 摘要 作为一种十分有效的理论模型,吸积盘理论已经广泛的应用于解释X射线双星系统、类星体和活动星系核等天体的高能辐射问题。
- New results from Auger, however, indicate that 12 of 15 ultra high energy cosmic rays have sky directions statistically consistent with the positions of nearby active galactic nuclei. 然而,从奥格观测站得到的最新数据表明12/15的极高能宇宙射线在统计上有天区位置分布,也就是与附近活跃星系核位置有关。