| 书目名称 | The Accretion and Obscured Growth of Supermassive Black Holes |
| 副标题 | First Constraints on |
| 编辑 | Peter Boorman |
| 视频video | |
| 概述 | Nominated as an outstanding Ph.D. thesis by the University of Southampton, Southampton, United Kingdom.Contains peer-reviewed research results that featured in a global NASA press release.A comprehens |
| 丛书名称 | Springer Theses |
| 图书封面 |  |
| 描述 | This thesis describes the application of state-of-the-art high-energy X-ray studies to the astronomical quest for understanding obscured active galactic nuclei (AGN). These AGN are supermassive black holes growing by accretion of matter located in the nuclei of galaxies. The material that feeds these black holes also obscures them from view, rendering them challenging to study. It is possible to study them by effectively ‘X-raying‘ galactic nuclei to peer through these obscuring veils.. .Beginning with the proof-of-concept application of novel X-ray Monte Carlo codes to the Nuclear Spectroscopic Telescope ARray (NuSTAR) spectrum of a known heavily obscured AGN, the thesis establishes the relevant parameters that characterise the AGN spectrum and central black hole growth rate. Next the largest sample of known heavily obscured AGN is compiled, finding the strength of a prominent iron spectral feature to weaken with AGN power. This is puzzling, and suggeststhat there may be more hidden AGN than previously thought. Finally by combining an all-sky infrared selection with NuSTAR follow-up, new heavily obscured AGN are identified. Obscuration emits infrared radiation, meaning that the in |
| 出版日期 | Book 2021 |
| 关键词 | Studying Active Galactic Nuclei; high energy X-rays in astronomy; Obscuration of galactic nuclei; Super |
| 版次 | 1 |
| doi | https://doi.org/10.1007/978-3-030-60361-8 |
| isbn_softcover | 978-3-030-60363-2 |
| isbn_ebook | 978-3-030-60361-8Series ISSN 2190-5053 Series E-ISSN 2190-5061 |
| issn_series | 2190-5053 |
| copyright | The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Switzerl |
发表于 2025-3-21 17:32:29
