Collection Agn S B
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Internal Revenue Manual Index
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Author : United States. Internal Revenue Service
language : en
Publisher:
Release Date : 2005-07
Internal Revenue Manual Index written by United States. Internal Revenue Service and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005-07 with Internal Revenue manual categories.
Millimeter And Submillimeter Studies On The Active Trinity Of Gas Stars And Black Holes In Seyfert Galaxies
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Author : Takuma Izumi
language : en
Publisher: Springer
Release Date : 2018-01-23
Millimeter And Submillimeter Studies On The Active Trinity Of Gas Stars And Black Holes In Seyfert Galaxies written by Takuma Izumi and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-01-23 with Science categories.
This thesis focuses on understanding the growth and formation mechanism of supermassive black holes (SMBHs), an issue it addresses by investigating the dense interstellar medium that is assumed to be a crucial component of the fuel for SMBHs. The thesis also offers unique guidance on using the Atacama Large Millimeter/submillimeter Array (ALMA) in active galactic nuclei (AGN) research. The author presents the three major findings regarding SMBH formation and growth: (1) The development of a new diagnostic method for the energy sources in galaxies based on submillimeter spectroscopy, which allows identification of accreting SMBHs even in obscured environments, (2) the discovery that the circumnuclear dense gas disk (CND), with a typical size of a few tens of parsecs, which plays a crucial role in governing the growth of SMBHs, and (3) the discovery that the mass transfer budget from the CND to the central SMBHs can be quantitatively understood with a theoretical model incorporating the circumnuclear starburst as a driver of mass transfer. The thesis skillfully reviews these three findings, which have greatly improved our understanding of the growth mechanism of SMBHs.
Active Galactic Nuclei
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Author : Volker Beckmann
language : en
Publisher: John Wiley & Sons
Release Date : 2013-08-29
Active Galactic Nuclei written by Volker Beckmann and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-08-29 with Science categories.
Active Galactic Nuclei This AGN textbook gives an overview on the current knowledge of the Active Galacitc Nuclei phenomenon. The spectral energy distribution will be discussed, pointing out what can be observed in different wavebands. The different physical models are presented together with formula important for the understanding of AGN physics. Furthermore, the authors discuss the AGN with respect to its environment, host galaxy, feedback in galaxies and in clusters of galaxies, variability, etc. and finally the cosmological evolution of the AGN phenomenon. This book includes phenomena based on new results in the X-Ray and gamma-ray domain from new telescopes such as Chandra, XMM-Newton, the Fermi Gamma-Ray Space Telescope, and the VHE regime not mentioned so far in AGN books. Those and other new developments as well as simulations of AGN merging events and formations, enabled through latest super-computing capabilities. From the contents: The observational picture of AGN Radiative processes The central engine AGN types and unification AGN through the electromagnetic spectrum AGN variability Environment Quasars and cosmology Formation, evolution and the ultimate fate of AGN What we do not know (yet)
Demographics Of The Cold Universe With Alma
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Author : Seiji Fujimoto
language : en
Publisher: Springer Nature
Release Date : 2022-01-05
Demographics Of The Cold Universe With Alma written by Seiji Fujimoto and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-01-05 with Science categories.
This book presents the cold side of the Universe illustrated by the rest-frame, far-infrared emission with Atacama Large Millimeter/submillimeter Array (ALMA). The author constructed the largest-ever ALMA sample and dataset, which enables them to identify very faint, rest-frame, far-infrared dust continuums as well as the carbon fine-structure line emission from distant galaxies that have been missed in previous surveys. The observational findings described in this book reveal for the first time where and how much of the star formation, traced by the rest-frame far-infrared emission, is ongoing, from inter-stellar and circum-galactic media to cosmic structures. Moreover, since some of the findings are unexpected and as such challenge the current galaxy formation models, the book provides exciting questions that should be addressed in the next decades.
The Interplay Between Massive Star Formation The Ism And Galaxy Evolution
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Author : D. Kunth
language : en
Publisher: Atlantica Séguier Frontières
Release Date : 1996
The Interplay Between Massive Star Formation The Ism And Galaxy Evolution written by D. Kunth and has been published by Atlantica Séguier Frontières this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with Cosmology categories.
Active Galactic Nuclei
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Author : Julian H. Krolik
language : en
Publisher: Princeton University Press
Release Date : 2021-03-09
Active Galactic Nuclei written by Julian H. Krolik and has been published by Princeton University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-03-09 with Science categories.
This is the first comprehensive treatment of active galactic nuclei--the cosmic powerhouses at the core of many distant galaxies. The term active galactic nuclei refers to quasars, radio galaxies, Seyfert galaxies, blazars, and related objects, all of which are believed to share a similar central engine--a supermassive black hole many times the mass of the Sun. Astrophysicists have studied these phenomena for the past several decades and have begun to develop a consensus about many of their properties and internal mechanisms. Julian Krolik, one of the world's leading authorities on the subject, sums up leading ideas from across the entire range of research, making this book an invaluable resource for astronomers, physicists interested in applications of the theory of gravitation, and graduate students. Krolik begins by addressing basic questions about active galactic nuclei: What are they? How can they be found? How do they evolve? He assesses the evidence for massive black holes and considers how they generate power by accretion. He discusses X-ray and g-ray emission, radio emission and jets, emission and absorption lines, anisotropic appearance, and the relationship between an active nucleus and its host galaxy. He explores the mysteries of what ignites, fuels, and extinguishes active galactic nuclei, and concludes with a general review of where the field now stands. The book is unique in paying careful attention to relevant physics as well as astronomy, reflecting in part the importance of general relativity to understanding active galactic nuclei. Clear, authoritative, and detailed, this is crucial reading for anyone interested in one of the most dynamic areas of astrophysics today.
The Native Americans Of The Texas Edwards Plateau 1582 1799
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Author : Maria F. Wade
language : en
Publisher: University of Texas Press
Release Date : 2010-01-01
The Native Americans Of The Texas Edwards Plateau 1582 1799 written by Maria F. Wade and has been published by University of Texas Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010-01-01 with Social Science categories.
2003 – Texas Old Missions and Forts Restoration Association Book Award Winner – Texas Catholic Historical Society 2004 – Finalist: Friends of the Dallas Public Library Award for Book Making the Most Significant Contribution to Knowledge – Texas Institute of Letters The region that now encompasses Central Texas and northern Coahuila, Mexico, was once inhabited by numerous Native hunter-gather groups whose identities and lifeways we are only now learning through archaeological discoveries and painstaking research into Spanish and French colonial records. From these key sources, Maria F. Wade has compiled this first comprehensive ethnohistory of the Native groups that inhabited the Texas Edwards Plateau and surrounding areas during most of the Spanish colonial era. Much of the book deals with events that took place late in the seventeenth century, when Native groups and Europeans began to have their first sustained contact in the region. Wade identifies twenty-one Native groups, including the Jumano, who inhabited the Edwards Plateau at that time. She offers evidence that the groups had sophisticated social and cultural mechanisms, including extensive information networks, ladino cultural brokers, broad-based coalitions, and individuals with dual-ethnic status. She also tracks the eastern movement of Spanish colonizers into the Edwards Plateau region, explores the relationships among Native groups and between those groups and European colonizers, and develops a timeline that places isolated events and singular individuals within broad historical processes.
Modernity In The Flesh
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Author : Kristin Ruggiero
language : en
Publisher: Stanford University Press
Release Date : 2004
Modernity In The Flesh written by Kristin Ruggiero and has been published by Stanford University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with Social Science categories.
This book examines the lives of people caught in the dynamics of changing mores, rapid urbanization, and real public health issues in nineteenth-century Buenos Aires. Modernity in the Flesh shows the costs Argentines paid for the establishment of liberal democracy between 1880 and 1910. Modernity raised consciousness of the public good and a commitment to new sciences and a new set of priorities that asserted the precedence of health and security of the social whole. This book shows the ways that the tensions of liberal democracy between individual rights and the social good were tempered by "flesh" and articulated through this word. As the state was pursuing positivist science and government, the flesh held out a type of corrective to the focus on scientific and material progress.
The Physics And Evolution Of Active Galactic Nuclei
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Author : Hagai Netzer
language : en
Publisher: Cambridge University Press
Release Date : 2013-09-16
The Physics And Evolution Of Active Galactic Nuclei written by Hagai Netzer and has been published by Cambridge University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-09-16 with Science categories.
Research into active galactic nuclei (AGN) – the compact, luminous hearts of many galaxies – is at the forefront of modern astrophysics. Understanding these objects requires extensive knowledge in many different areas: accretion disks, the physics of dust and ionized gas, astronomical spectroscopy, star formation, and the cosmological evolution of galaxies and black holes. This new text by Hagai Netzer, a renowned astronomer and leader in the field, provides a comprehensive introduction to the theory underpinning our study of AGN and the ways that we observe them. It emphasizes the basic physics underlying AGN, the different types of active galaxies and their various components, and the complex interplay between them and other astronomical objects. Recent developments regarding the evolutionary connections between active galaxies and star-forming galaxies are explained in detail. Both graduate students and researchers will benefit from Netzer's authoritative contributions to this exciting field of research.
Astrophysics Of Gas Nebulae And Active Galactic Nuclei
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Author : Donald E. Osterbrock
language : en
Publisher: University Science Books
Release Date : 2006
Astrophysics Of Gas Nebulae And Active Galactic Nuclei written by Donald E. Osterbrock and has been published by University Science Books this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with Science categories.
Thoroughly revised and expanded throughout, the new edition is a graduate-level text and reference book on gaseous nebulae, nova and supernova remnants. Much of the new data and new images are from the Hubble Space Telescope with two wholly new chapters being added along with other new features. The previous edition which was tried and tested for thirty years has now been succeeded by a revised, updated, larger edition, which will be valuable to anyone seriously interested in astrophysics.