Download or read book X Ray Probe of Ultra Fast Outflows in Active Galactic Nuclei written by Francesco Tombesi and published by LAP Lambert Academic Publishing. This book was released on 2012-08 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book discuss new recent and exciting results in the field of accretion and ejection physics onto supermassive black holes at the center of active galactic nuclei (AGN). Through a uniform and systematic analysis of the X-ray spectra of a large sample of Seyfert and radio galaxies observed with the XMM-Newton and Suzaku satellites, here we report the statistical significance of blue-shifted Fe K absorption lines at energies higher than 6 keV. A curve of growth analysis and detailed modeling are reported as well. This allows to estimate the general parameters of the associated ultra-fast outflows (UFOs). They are found to be common, highly ionized, massive and with mildly-relativistic velocities. Their location is very close to the accreting supermassive black hole, consistent with being accretion disk outflows. Their mechanical power is also high enough to significantly affect the surrounding environment, therefore contributing to the feedback between the central black hole and the host galaxy. These results have been recently featured in conjunct press releases by NASA, the European Space Agency and the National Italian Institute for Astrophysics.
Download or read book X ray Emission from Active Galactic Nuclei written by R. F. Mushotsky and published by . This book was released on 1985 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The X ray Flux Dipole of AGNs and the Peculiar Motion of the Local Group written by Takamitsu Miyaji and published by . This book was released on 1990 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book X ray and Optical Properties of X ray Luminous Active Galactic Nuclei written by Mirko Krumpe and published by . This book was released on 2007 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Physics and Evolution of Active Galactic Nuclei written by Hagai Netzer and published by Cambridge University Press. This book was released on 2013-09-16 with total page 369 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive introduction to the theory underpinning our study of active galactic nuclei and the ways we observe them.
Download or read book X ray and Optical Studies of Extragalactic X ray Emitters written by Gail Anne Reichert and published by . This book was released on 1982 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Optical and X ray Properties of X ray Selected Active Galactic Nuclei written by Gerard Anthony Kriss and published by . This book was released on 1982 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book X ray Spectral Variability as a Probe of Active Galactic Nuclei written by Tahir Yaqoob and published by . This book was released on 1990 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Introduction to Active Galactic Nuclei written by Bradley M. Peterson and published by Cambridge University Press. This book was released on 1997-02-13 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book X ray Emission from Active Galactic Nuclei and the Cosmic X ray Background written by Joachim Trumper and published by . This book was released on 1992 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Are There Intrinsically X Ray Quiet Quasars written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-05-29 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent ROSAT studies have identified a significant population of Active Galactic Nuclei (AGN) that are notably faint in soft X-rays relative to their optical fluxes. Are these AGN intrinsically X-ray weak or are they just highly absorbed? Brandt, Laor & Wills have systematically examined the optical and UV spectral properties of a well-defined sample of these soft X-ray weak (SXW) AGN drawn from the Boroson & Green sample of all the Palomar Green AGN 00 with z
Download or read book Studies of X ray Absorption Spectra Due to Active Galactic Nuclei Outflows written by Tomer Holczer and published by . This book was released on 2006 with total page 41 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Active Galactic Nuclei written by Francoise Combes and published by John Wiley & Sons. This book was released on 2022-08-23 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt: All galaxies host a super-massive black hole in their center. These black holes grow their mass in symbiosis with their host galaxy and moderate their star formation. When matter is driven towards the nucleus, an accretion disk is formed to transfer angular momentum and considerable energy is released when the material falls into the black hole: this is the phenomenon of active galactic nuclei (AGN). A nucleus can shine one thousand times more brightly than the entire galaxy with its 200 billion stars. The nuclear activity can take many forms, from very powerful quasars to more ordinary Seyfert galaxies, passing by radio-galaxies, which eject a collimated plasma at ten times the radius of the galaxy. This book examines all of these manifestations and presents a unified view. When two galaxies merge, a binary black hole is formed and the two black holes will spiral inwards and merge, emitting long gravitational waves, which could be detected by the future LISA satellite.
Download or read book Outflow and Feedback in Active Galactic Nuclei written by R. G. Detmers and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Measuring the Angular Momentum of Supermassive Black Holes written by Laura Brenneman and published by Springer Science & Business Media. This book was released on 2013-06-26 with total page 57 pages. Available in PDF, EPUB and Kindle. Book excerpt: Measuring the spin distribution of supermassive black holes is of critical importance for understanding how these black holes and their host galaxies form and evolve over time, yet this type of study is only in its infancy. This brief describes how astronomers measure spin in supermassive black holes using X-ray spectroscopy. It also reviews the constraints that have been placed on the spin distribution in local, bright active galaxies over the past six years, and the cosmological implications of these constraints. Finally, it summarizes the open questions that remain in this exciting new field of research and points toward future discoveries soon to be made by the next generation of space-based observatories.
Download or read book Long term X ray Variability of Active Galactic Nuclei and X ray Binaries written by and published by . This book was released on 2004 with total page 141 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modelling Signatures of Outflow in X ray Spectra of Active Galactic Nuclei written by Janina von Groote and published by . This book was released on 2010 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt:
