由长期过程触发的喷流AGN的大质量黑洞、高吸积率和非倾斜喷流反馈

IF 12.7 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY ACS Central Science Pub Date : 2023-08-01 DOI:10.1016/j.jheap.2023.06.001
Chandra B. Singh , David Garofalo
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引用次数: 0

摘要

喷射的活动星系核(AGN)也存在于螺旋星系中,这一点现在已经得到了很好的证实。在过去的十年里,Foschini和其他人描述了我们对这些物体如何属于射电暴AGN亚类的理解,螺旋中的喷流比射电星系和类星体的喷流弱,因为螺旋中的黑洞质量往往较小。然而,最近的数据可能指向了我们所描述的另一幅图景。与椭圆星系中强大的喷流AGN不同,我们从模型的角度说明了螺旋喷流的特征,这些特征限制了它们的功率及其对宿主星系的影响。由长期过程触发的AGN无法产生喷流重新定向,这是合并触发的椭圆星系中喷流AGN反馈机制的一个关键因素,导致了M87等低红移的红色和死亡射电星系。因此,与射电星系和类星体相比,螺旋状喷射的AGN往往生活在参数空间的一个单独部分。由于没有喷流重新定向,并且喷流阶段相对较短,与任何其他喷流AGN亚类相比,螺旋状喷流AGN最好与无线电静默或无喷流AGN进行比较。
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The massive black holes, high accretion rates, and non-tilted jet feedback, of jetted AGN triggered by secular processes

That jetted active galactic nuclei (AGN) are also hosted in spiral galaxies is now well established. Our understanding of how such objects might fit in the radio loud AGN subclass has been described by Foschini and others over the past decade in that jets in spirals are weaker than those of radio galaxies and quasars because the black holes in spirals tend to be less massive. Recent data, however, may be pointing to a different picture which we describe. Unlike powerful jetted AGN in ellipticals, we illustrate from model perspectives, features of jets in spirals responsible for limiting both their power as well as their effect on their host galaxies. AGN triggered by secular processes fail to generate jet re-orientation, a key ingredient in the jetted AGN feedback mechanism in merger-triggered ellipticals that leads to the red-and-dead radio galaxies at low redshift such as M87. As a result, jetted AGN in spirals tend to live in a separate part of the parameter space compared to radio galaxies and quasars. Because of the absence of jet re-orientation and due to the relatively short-lived jet phases, jetted AGN in spirals are best compared to radio quiet or jetless AGN than any other jetted AGN subclass.

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来源期刊
ACS Central Science
ACS Central Science Chemical Engineering-General Chemical Engineering
CiteScore
25.50
自引率
0.50%
发文量
194
审稿时长
10 weeks
期刊介绍: ACS Central Science publishes significant primary reports on research in chemistry and allied fields where chemical approaches are pivotal. As the first fully open-access journal by the American Chemical Society, it covers compelling and important contributions to the broad chemistry and scientific community. "Central science," a term popularized nearly 40 years ago, emphasizes chemistry's central role in connecting physical and life sciences, and fundamental sciences with applied disciplines like medicine and engineering. The journal focuses on exceptional quality articles, addressing advances in fundamental chemistry and interdisciplinary research.
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