Reverberation Mapping of the Broad-line Region in Active Galactic Nuclei PDF Download

Author: Rutherford Appleton Laboratory. Workshop on Astronomy and Astrophysics
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 410

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Author: P. M. Gondhalekar
Publisher:
ISBN: 9789377078805
Category : Active galactic nuclei
Languages : en
Pages : 384

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Book Description

Author: Danielle Alloin
Publisher: Springer
ISBN: 354034621X
Category : Science
Languages : en
Pages : 243

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Book Description
This book contains a collection of lecture notes written by recognized experts in the field of Active Galactic Nuclei (AGN). The collection is aimed at providing both an introduction and at the same time an overview of the state-of-the-art of AGN research. This book also addresses the still not entirely understood link of an AGN with its host galaxy and also the related question of the birth and growth of massive black holes in the Universe.

Author: Bradley M. Peterson
Publisher: Cambridge University Press
ISBN: 9780521479110
Category : Science
Languages : en
Pages : 258

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Book Description
How can we test if a supermassive black hole lies at the heart of every active galactic nucleus? What are LINERS, BL Lacs, N galaxies, broad-line radio galaxies and radio-quiet quasars and how do they compare? This timely textbook answers these questions in a clear, comprehensive and self-contained introduction to active galactic nuclei - for graduate students in astronomy and physics. The study of AGN is one of the most dynamic areas of contemporary astronomy, involving one fifth of all research astronomers. This textbook provides a systematic review of the observed properties of AGN across the entire electromagnetic spectrum, examines the underlying physics, and shows how the brightest AGN, quasars, can be used to probe the farthest reaches of the Universe. This book serves as both an entry point to the research literature and as a valuable reference for researchers in the field.

Author: C. Martin Gaskell
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 480

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Book Description
Annotation Proceedings of a March 1998 meeting, with papers in sections on general considerations and photoionization modeling, profile variation and reverberation mapping, flows, disks, narrow-line Seyfert 1 galaxies, the intermediate line region and lower-velocity gas, X-ray warm absorber and dust, and unified theories and connections with extended emission. Specific topics include spectral variability of NGC 4151 during 1990 and disk emission line issues. Lacks a subject index. The editor is associated with the University of Nebraska. Annotation c. Book News, Inc., Portland, OR (booknews.com)

Author: Anna K. Pancoast
Publisher:
ISBN: 9781339218304
Category :
Languages : en
Pages : 230

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Book Description
Measuring the masses of supermassive black holes in active galactic nuclei (AGN) allows us to trace their evolution over cosmic time and understand how black holes coevolve with their host galaxies. We present a new technique to measure black hole masses and constrain the structure of the broad line region in AGN using reverberation mapping data. We begin by developing a simply parameterized phenomenological model of the broad line region geometry and dynamics and apply this model to high-quality reverberation mapping data for six AGN from the Lick AGN Monitoring Project 2008 and 2011 datasets. The results of this analysis provide the most precise AGN black hole masses from reverberation mapping to date and the first detailed constraints on the geometry and dynamics of the broad line region emission. Specifically, we find that the shape of the broad line region is generally a close to face-on thick disk with preferential emission from the far side, and that the dynamics range from inflow to near-circular orbits. In addition, we present photometric AGN light curves using image subtraction for the Lick AGN Monitoring Project 2011 dataset as a first step towards modeling the broad line region in a larger sample of AGN.

Author: Shaelyn Shadwell
Publisher:
ISBN:
Category : Active galactic nuclei
Languages : en
Pages : 0

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Book Description
"In the next few years, large-scale surveys with a time domain element, such as the ten-year Legacy Survey of Space and Time (LSST), will produce an immense data set to study variable and transient astronomical sources such as active galactic nuclei (AGN). AGN are located at the center of most galaxies and have five major components: a supermassive black hole (SMBH), an accretion disk, the broad-line region (BLR), a dusty circumnuclear torus, and the narrow-line region (NLR). The torus is believed to have a two-component structure: a geometrically thin circumnuclear disk and a hollow dusty cone along the polar axis. The torus absorbs the ultraviolet (UV)/optical light from the accretion disk and re-emits it in the infrared (IR). In order to study the properties of the torus, techniques such as dust reverberation mapping are needed since AGN, at large distances, cannot be resolved by direct imaging. Reverberation mapping uses the differences in the UV/optical and IR light travel times (lags) to determine the properties of the torus region. This thesis focuses on the use of the TOrus Reverberation MApping Code, TORMAC, to create simulations of the response of the IR dust emission to an input AGN light curve. Both an observed optical light curve, that of MCG-06-30-15, a narrow-line Seyfert 1 (NLS1) AGN, and a simulated AGN light curve were used as inputs. These simulations are used to determine how observing strategies (time baselines and observing cadences) and practical limitations (such as seasonal gaps, irregular sampling) affect how much information can be recovered about the properties of the torus region. In addition, I examined how various torus parameters affect the lags recovered from reverberation mapping. The work performed in this thesis will help inform the design of future optical-IR monitoring campaigns, as well as, to better understand the uncertainties in previous studies - especially those with sparse sampling and limited time duration."--Abstract.

Author: Hagai Netzer
Publisher: Cambridge University Press
ISBN: 1107021510
Category : Science
Languages : en
Pages : 369

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Book Description
A comprehensive introduction to the theory underpinning our study of active galactic nuclei and the ways we observe them.

Author: Luis C. Ho
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 830

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Book Description

Author: Volker Beckmann
Publisher: John Wiley & Sons
ISBN: 3527410783
Category : Science
Languages : en
Pages : 390

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Book Description
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)