Active Galactic Nuclei

Active Galactic Nuclei
Title Active Galactic Nuclei PDF eBook
Author Volker Beckmann
Publisher John Wiley & Sons
Pages 390
Release 2012-09-24
Genre Science
ISBN 3527410783

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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)

If I Should Die Before I Wake

If I Should Die Before I Wake
Title If I Should Die Before I Wake PDF eBook
Author Han Nolan
Publisher Houghton Mifflin Harcourt
Pages 316
Release 2003
Genre Juvenile Fiction
ISBN 9780152046798

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A neo-Nazi teen is transported back in time to World War II Poland, where she is now a Jewish girl in a Nazi ghetto.

High Energy Processes in Accreting Black Holes

High Energy Processes in Accreting Black Holes
Title High Energy Processes in Accreting Black Holes PDF eBook
Author Juri Poutanen
Publisher
Pages 449
Release 1999
Genre
ISBN

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Galactic Bulges

Galactic Bulges
Title Galactic Bulges PDF eBook
Author Eija Laurikainen
Publisher Springer
Pages 480
Release 2015-09-29
Genre Science
ISBN 3319193783

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This book consists of invited reviews on Galactic Bulges written by experts in the field. A central point of the book is that, while in the standard picture of galaxy formation a significant amount of the baryonic mass is expected to reside in classical bulges, the question what is the fraction of galaxies with no classical bulges in the local Universe has remained open. The most spectacular example of a galaxy with no significant classical bulge is the Milky Way. The reviews of this book attempt to clarify the role of the various types of bulges during the mass build-up of galaxies, based on morphology, kinematics and stellar populations and connecting their properties at low and high redshifts. The observed properties are compared with the predictions of the theoretical models, accounting for the many physical processes leading to the central mass concentration and their destruction in galaxies. This book serves as an entry point for PhD students and non-specialists and as a reference work for researchers in the field.

Compact Stellar X-ray Sources

Compact Stellar X-ray Sources
Title Compact Stellar X-ray Sources PDF eBook
Author Walter Lewin
Publisher Cambridge University Press
Pages 667
Release 2006-04-06
Genre Science
ISBN 1139451774

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X-ray astronomy is the prime available window on astrophysical compact objects: black holes, neutron stars and white dwarfs. In this book, prominent experts provide a comprehensive overview of the observations and astrophysics of these objects. This is a valuable reference for graduate students and active researchers.

Supermassive Black Holes in the Distant Universe

Supermassive Black Holes in the Distant Universe
Title Supermassive Black Holes in the Distant Universe PDF eBook
Author A.J. Barger
Publisher Springer Science & Business Media
Pages 322
Release 2004-08-03
Genre Science
ISBN 9781402024702

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Quasars, and the menagerie of other galaxies with "unusual nuclei", now collectively known as Active Galactic Nuclei or AGN, have, in one form or another, sparked the interest of astronomers for over 60 years. The only known mechanism that can explain the staggering amounts of energy emitted by the innermost regions of these systems is gravitational energy release by matter falling towards a supermassive black hole --- a black hole whose mass is millions to billions of times the mass of our Sun. AGN emit radiation at all wavelengths. X-rays originating at a distance of a few times the event horizon of the black hole are the emissions closest to the black hole that we can detect; thus, X-rays directly reveal the presence of active supermassive black holes. Oftentimes, however, the supermassive black holes that lie at the centers of AGN are cocooned in gas and dust that absorb the emitted low energy X-rays and the optical and ultraviolet light, hiding the black hole from view at these wavelengths. Until recently, this low-energy absorption presented a major obstacle in observational efforts to map the accretion history of the universe. In 1999 and 2000, the launches of the Chandra and XMM-Newton X-ray Observatories finally broke the impasse. The impact of these observatories on X-ray astronomy is similar to the impact that the Hubble Space Telescope had on optical astronomy. The astounding new data from these observatories have enabled astronomers to make enormous advances in their understanding of when accretion occurs.

Astrophysics Update 2

Astrophysics Update 2
Title Astrophysics Update 2 PDF eBook
Author John Mason
Publisher Springer
Pages 0
Release 2010-11-20
Genre Science
ISBN 9783642067785

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"Astrophysics Updates" is intended to serve the information needs of professional astronomers and postgraduate students about areas of astronomy, astrophysics and cosmology that are rich and active research spheres. Observational methods and the latest results of astronomical research are presented as well as their theoretical foundations and interrelations. The contributed commissioned articles are written by leading exponents in a format that will appeal to professional astronomers and astrophysicists who are interested in topics outside their own specific areas of research. This collection of timely reviews may also attract the interest of advanced amateur astronomers seeking scientifically rigorous coverage.