活动星系核发射线的物理性质
发布时间：2018-11-06 16:36
【摘要】：光谱中的强发射线是活动星系核最显着的观测特征,通过发射线来研究活动星系核的物理性质是应用最广泛的方法,为理解活动星系核的本质提供了大量的信息。不论是宽发射线还是窄发射线,都是通过来自活动星系核中心能源的高能光子光致电离产生的,因此都能用于研究活动星系核。发射线的各种特征(流量强度、等值宽度、速度偏移等等)与活动星系核的各方面性质之间存在各种各样的联系,这方面的研究已经取得了巨大的成果。随着观测设备和手段的不断更新,利用发射线来研究活动星系核的物理性质也更加的深入,范围也更加的广泛。 本论文主要集中在利用λλ4959,5007窄发射线来研究活动星系核的某些特殊天体物理现象,包括双活动星系核的存在和性质、活动星系核外流与核活动的联系以及与宿主星系的联系和演化。这些都是近十年来在星系的形成和演化中取得的最新进展。对于双活动星系核,已经发现了相当数量的实例,开始了大规模的寻找。活动星系核的外流,或反馈,已经被认为是活动星系核活动与宿主星系演化过程中不可缺少的机制。论文的具体结构如下： 第一章是活动星系核的概述,简单介绍了活动星系核标准模型和发射线的产生区域,并介绍了宇宙学模型下活动星系核与宿主星系之间的关系,以及我们研究的重要性和意义。还介绍了窄发射线的复杂结构和在研究中的重要作用。同时也简单介绍了SDSS这个巡天项目。 第二章主要介绍了我们找到了一个双活动星系核的候选体。我们对宽线类星体SDSS J1425+3231这个源的光谱进行了分析,扣除连续谱后得到的发射线明显具有双峰结构,然后我们仔细解析了窄发射线的双峰结构,在此基础上估算了中心黑洞的质量,并分析了双峰窄发射线的起源,最后提出这是一个双活动星系核的候选体。此外了还讨论了发现双活动星系核的方法和可能性。 第三章主要讨论对活动星系核中外流的统计研究。我们对具有蓝移不对称窄发射线的2型活动星系核样本进行发射线分析,发现窄发射线两个成分的流量存在很强的相关,但没发现窄发射线蓝移线翼偏移速度与星系的物理性质之间存在联系；还比较了1型、2型活动星系核窄发射线蓝移线翼的性质,发现1型活动星系核具有更高的蓝移线翼速度,线翼成分更靠近活动星系核中心。最后提出窄发射线蓝移的宽线翼来自于活动星系核的外流,和现有的结果一致。 第四章是我们工作的简单总结和对未来工作的展望,以及对拓展我们工作应用的设想。
[Abstract]:The strong emission line in the spectrum is the most significant observational feature of AGNs. Studying the physical properties of AGNs through emission lines is the most widely used method which provides a lot of information for understanding the essence of AGNs. Both wide and narrow emission lines are generated by high-energy photonic ionization from the central energy of AGNs, so they can be used to study AGNs. There are various relationships between the characteristics of emission lines (flow intensity, equivalent width, velocity offset, etc.) and the properties of active galactic nuclei (AGNs). Great achievements have been made in this field. With the continuous updating of observational equipment and means, the use of emission lines to study the physical properties of AGNs is more in-depth and more extensive. In this paper, we mainly focus on the study of some special astrophysical phenomena in active galactic nuclei, including the existence and properties of dual active galactic nuclei, using the 位 4959 / 5007 narrow emission line. The relation between active galaxy nuclear outflow and nuclear activity, and the relation and evolution with host galaxy. These are the latest developments in the formation and evolution of galaxies in the last decade. For dual-active galactic nuclei, a considerable number of examples have been discovered and large-scale searches have begun. The outflow or feedback of AGNs has been regarded as an indispensable mechanism in the evolution of AGNs and host galaxies. The specific structure of the thesis is as follows: the first chapter is an overview of the active galactic nuclei (AGNs). The standard model of AGNs and the region of emission lines are briefly introduced, and the relationship between AGNs and host galaxies under the cosmological model is also introduced. And the importance and significance of our research. The complex structure of the narrow emission line and its important role in the study are also introduced. At the same time, it also briefly introduces the SDSS project. In the second chapter, we find a candidate for a dual active galactic nucleus. We have analyzed the spectrum of the wide-line quasar SDSS J1425 3231. The emission line obtained by deducting the continuous spectrum obviously has a bimodal structure, and then we have carefully analyzed the two-peak structure of the narrow emission line. On this basis, the mass of the central black hole is estimated, and the origin of the bimodal narrow emission line is analyzed. Finally, it is proposed that this is a candidate for the double active galactic nucleus. In addition, the method and possibility of finding dual active galactic nuclei are also discussed. Chapter three mainly discusses the statistical study of the outflow of active galactic nuclei (AGNs). We analyzed the emission lines of type 2 active galactic nuclei with blue shift asymmetric narrow emission lines and found that there was a strong correlation between the two components of the narrow emission lines. However, there is no relationship between the blue shift wing migration velocity of the narrow emission line and the physical properties of the galaxy. The properties of the narrow emission line blue shift wing of type 1 and type 2 active galactic nuclei are also compared. It is found that type 1 active galactic nuclei have higher bluefin velocities and the composition of the wings is closer to the center of the active galactic nuclei (AGNs). Finally, it is proposed that the wide line wing of the blue shift of the narrow emission line is derived from the outflow of the active galactic nucleus, which is consistent with the existing results. The fourth chapter is a brief summary of our work and prospects for future work, as well as ideas for expanding our work applications.
【学位授予单位】：南京大学
【学位级别】：博士
【学位授予年份】：2013
【分类号】：P157.6
本文编号：2314846
[Abstract]:The strong emission line in the spectrum is the most significant observational feature of AGNs. Studying the physical properties of AGNs through emission lines is the most widely used method which provides a lot of information for understanding the essence of AGNs. Both wide and narrow emission lines are generated by high-energy photonic ionization from the central energy of AGNs, so they can be used to study AGNs. There are various relationships between the characteristics of emission lines (flow intensity, equivalent width, velocity offset, etc.) and the properties of active galactic nuclei (AGNs). Great achievements have been made in this field. With the continuous updating of observational equipment and means, the use of emission lines to study the physical properties of AGNs is more in-depth and more extensive. In this paper, we mainly focus on the study of some special astrophysical phenomena in active galactic nuclei, including the existence and properties of dual active galactic nuclei, using the 位 4959 / 5007 narrow emission line. The relation between active galaxy nuclear outflow and nuclear activity, and the relation and evolution with host galaxy. These are the latest developments in the formation and evolution of galaxies in the last decade. For dual-active galactic nuclei, a considerable number of examples have been discovered and large-scale searches have begun. The outflow or feedback of AGNs has been regarded as an indispensable mechanism in the evolution of AGNs and host galaxies. The specific structure of the thesis is as follows: the first chapter is an overview of the active galactic nuclei (AGNs). The standard model of AGNs and the region of emission lines are briefly introduced, and the relationship between AGNs and host galaxies under the cosmological model is also introduced. And the importance and significance of our research. The complex structure of the narrow emission line and its important role in the study are also introduced. At the same time, it also briefly introduces the SDSS project. In the second chapter, we find a candidate for a dual active galactic nucleus. We have analyzed the spectrum of the wide-line quasar SDSS J1425 3231. The emission line obtained by deducting the continuous spectrum obviously has a bimodal structure, and then we have carefully analyzed the two-peak structure of the narrow emission line. On this basis, the mass of the central black hole is estimated, and the origin of the bimodal narrow emission line is analyzed. Finally, it is proposed that this is a candidate for the double active galactic nucleus. In addition, the method and possibility of finding dual active galactic nuclei are also discussed. Chapter three mainly discusses the statistical study of the outflow of active galactic nuclei (AGNs). We analyzed the emission lines of type 2 active galactic nuclei with blue shift asymmetric narrow emission lines and found that there was a strong correlation between the two components of the narrow emission lines. However, there is no relationship between the blue shift wing migration velocity of the narrow emission line and the physical properties of the galaxy. The properties of the narrow emission line blue shift wing of type 1 and type 2 active galactic nuclei are also compared. It is found that type 1 active galactic nuclei have higher bluefin velocities and the composition of the wings is closer to the center of the active galactic nuclei (AGNs). Finally, it is proposed that the wide line wing of the blue shift of the narrow emission line is derived from the outflow of the active galactic nucleus, which is consistent with the existing results. The fourth chapter is a brief summary of our work and prospects for future work, as well as ideas for expanding our work applications.
【学位授予单位】：南京大学
【学位级别】：博士
【学位授予年份】：2013
【分类号】：P157.6
【共引文献】
相关期刊论文 前1条
1 刘超;袁峰;;活动星系核外流的产生机制..[J];天文学进展;2013年04期
相关硕士学位论文 前2条
1 赵振煜;星系团A2319的多色测光研究[D];南京师范大学;2013年
2 陈杰敏;伽玛暴寄主星系性质的统计分析[D];广西大学;2013年
，本文编号：2314846
本文链接：https://www.wllwen.com/kejilunwen/tianwen/2314846.html
