活動星系核發(fā)射線的物理性質(zhì)
發(fā)布時間：2018-11-06 16:36
【摘要】：光譜中的強發(fā)射線是活動星系核最顯著的觀測特征,通過發(fā)射線來研究活動星系核的物理性質(zhì)是應(yīng)用最廣泛的方法,為理解活動星系核的本質(zhì)提供了大量的信息。不論是寬發(fā)射線還是窄發(fā)射線,都是通過來自活動星系核中心能源的高能光子光致電離產(chǎn)生的,因此都能用于研究活動星系核。發(fā)射線的各種特征(流量強度、等值寬度、速度偏移等等)與活動星系核的各方面性質(zhì)之間存在各種各樣的聯(lián)系,這方面的研究已經(jīng)取得了巨大的成果。隨著觀測設(shè)備和手段的不斷更新,利用發(fā)射線來研究活動星系核的物理性質(zhì)也更加的深入,范圍也更加的廣泛。 本論文主要集中在利用λλ4959,5007窄發(fā)射線來研究活動星系核的某些特殊天體物理現(xiàn)象,包括雙活動星系核的存在和性質(zhì)、活動星系核外流與核活動的聯(lián)系以及與宿主星系的聯(lián)系和演化。這些都是近十年來在星系的形成和演化中取得的最新進(jìn)展。對于雙活動星系核,已經(jīng)發(fā)現(xiàn)了相當(dāng)數(shù)量的實例,開始了大規(guī)模的尋找�；顒有窍岛说耐饬�,或反饋,已經(jīng)被認(rèn)為是活動星系核活動與宿主星系演化過程中不可缺少的機制。論文的具體結(jié)構(gòu)如下： 第一章是活動星系核的概述,簡單介紹了活動星系核標(biāo)準(zhǔn)模型和發(fā)射線的產(chǎn)生區(qū)域,并介紹了宇宙學(xué)模型下活動星系核與宿主星系之間的關(guān)系,以及我們研究的重要性和意義。還介紹了窄發(fā)射線的復(fù)雜結(jié)構(gòu)和在研究中的重要作用。同時也簡單介紹了SDSS這個巡天項目。 第二章主要介紹了我們找到了一個雙活動星系核的候選體。我們對寬線類星體SDSS J1425+3231這個源的光譜進(jìn)行了分析,扣除連續(xù)譜后得到的發(fā)射線明顯具有雙峰結(jié)構(gòu),然后我們仔細(xì)解析了窄發(fā)射線的雙峰結(jié)構(gòu),在此基礎(chǔ)上估算了中心黑洞的質(zhì)量,并分析了雙峰窄發(fā)射線的起源,最后提出這是一個雙活動星系核的候選體。此外了還討論了發(fā)現(xiàn)雙活動星系核的方法和可能性。 第三章主要討論對活動星系核中外流的統(tǒng)計研究。我們對具有藍(lán)移不對稱窄發(fā)射線的2型活動星系核樣本進(jìn)行發(fā)射線分析,發(fā)現(xiàn)窄發(fā)射線兩個成分的流量存在很強的相關(guān),但沒發(fā)現(xiàn)窄發(fā)射線藍(lán)移線翼偏移速度與星系的物理性質(zhì)之間存在聯(lián)系；還比較了1型、2型活動星系核窄發(fā)射線藍(lán)移線翼的性質(zhì),發(fā)現(xiàn)1型活動星系核具有更高的藍(lán)移線翼速度,線翼成分更靠近活動星系核中心。最后提出窄發(fā)射線藍(lán)移的寬線翼來自于活動星系核的外流,和現(xiàn)有的結(jié)果一致。 第四章是我們工作的簡單總結(jié)和對未來工作的展望,以及對拓展我們工作應(yīng)用的設(shè)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.
【學(xué)位授予單位】：南京大學(xué)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2013
【分類號】：P157.6
本文編號：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.
【學(xué)位授予單位】：南京大學(xué)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2013
【分類號】：P157.6
【共引文獻(xiàn)】
相關(guān)期刊論文 前1條
1 劉超;袁峰;;活動星系核外流的產(chǎn)生機制..[J];天文學(xué)進(jìn)展;2013年04期
相關(guān)碩士學(xué)位論文 前2條
1 趙振煜;星系團(tuán)A2319的多色測光研究[D];南京師范大學(xué);2013年
2 陳杰敏;伽瑪暴寄主星系性質(zhì)的統(tǒng)計分析[D];廣西大學(xué);2013年
，本文編號：2314846
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