Disk-corona model of active galactic nuclei with nonthermal pairs

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National Aeronautics and Space Administration, National Technical Information Service, distributor , [Washington, DC, Springfield, Va
Other titlesDisk corona model of active galactic nuclei with nonthermal pairs.
StatementSachiko Tsuruta and Michael Kellen.
Series[NASA contractor report] -- NASA/CR-95-207146., NASA contractor report -- NASA CR-207146.
ContributionsKellen, Michael., United States. National Aeronautics and Space Administration.
The Physical Object
Pagination1 v.
ID Numbers
Open LibraryOL17591792M

Get this from a library. Disk-corona model of active galactic nuclei with nonthermal pairs. [Sachiko Tsuruta; Michael Kellen; United States.

National Aeronautics and Space Administration.]. The structure of hot accretion disks in active galactic nuclei (AGNs) is investigated, including soft photon injection, nonthermal relativistic electron injection, and pair cascades. The primary X-ray emission in active galactic nuclei (AGNs) is widely believed to be due to Comptonisation of the thermal radiation from the accretion disc in a corona of hot electrons.

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.

Physics of Active Galactic Nuclei at all Scales H. Netzer (auth.), Danielle Alloin, Rachel Johnson, Paulina Lira (eds.) The energy source in Active Galactic Nuclei is commonly accepted to be gravitational and released through accretion of matter onto a supermassive black hole.

Biography. Fulvio Melia is Professor of Physics, Astronomy, and the Applied Math Program at the University of Arizona, in Tucson. He is also the John Woodruff Simpson Fellow at Amherst College, a chair formerly held by the Nobel laureate Niels Bohr and noted American Poet Robert Frost, he is a Professorial Fellow in the School of Physics at Melbourne University, Australia, and is currently a.

Radio Galaxies have by now emerged as a new γ-ray emitting source class on the extragalactic sky. Given their remarkable observed characteristics, such as unusual gamma-ray spectra or ultrafast VHE variability, they represent unique examples to probe the nature and physics of active galactic nuclei (AGN) in general.

This review provides a compact summary of their observed characteristics at Cited by:   Relativistic Reconnection and Particle Acceleration In the Petschek regime, the reconnection rate is estimated as v ≈ ≈ c. (5) rec ln S The plasma is ejected from the system between two pairs of slow shocks with Alfvén veloc- ity (2); in the high-σ limit, the outflow becomes highly relativistic with the Lorentz factor γ = σ.

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Variability in active galactic nuclei is observed in UV to X-ray emission based light curves. This could be attributed to orbital signatures of the plasma that constitutes the accretion flow on the putative disk or in the developing jet close to the inner region of the central black hole.

We discuss some theoretical models based on this view. Studies of accreting stellar mass black holes also improve our understanding of active Galactic nuclei (AGN) and quasars. X-ray binaries with relativistic jets are often called microquasars (Mirabel et al.

) because of the similarities between these systems and quasars. However, detailed comparisons between the two populations are hampered. This banner text can have markup. web; books; video; audio; software; images; Toggle navigation. Alloin et al., Physics of Active Galactic Nuclei at all Scales, Lect.

Notes Phys. (Springer, Berlin Heidelberg ), DOI /b Library of Congress Control Number: ISSN ISBN Springer Berlin Heidelberg New York ISBN Springer Berlin Heidelberg New York This work is. Accepted for publication in A&A \\ \\ Paper: astro-ph/ From: Sergei Y.

Sazonov >sazonov(at) Date: Tue, 17 Feb GMT (kb) Title: Statistical properties of local active galactic nuclei inferred from the RXTE keV all-sky survey Authors: S. Sazonov, M. Revnivtsev Comments: 15 pages, 12 figures. The physical properties of X-ray novae as close binary systems are analysed.

Observational data in X-ray, UV, optical, IR and radio ranges are summarized. Modern theoretical considerations of the problem of X-ray novae, taking into account some new ideas and results, are described.

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Properties of optical stars in X-ray novae are analysed. Data about the masses of black holes in X-ray binary. Our disk corona model is based on the so-called nanoflare model for the solar corona.

We show that the magnetic heating near the disks can result in the formation of a hot corona with a temperature of ≳ K, even if the average field strength in the disk is moderately weak, ≳1 G.

The Extended Range X-Ray Telescope center director's discretionary fund report. NASA Technical Reports Server (NTRS) Hoover, R.

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B.; Cumings, N. P.; Hildner, E.; Moore. Wallinder, F.H., Kato, S. and Abramowicz, M.A. Variability of the Central Region in Active Galactic Nuclei (Astronomy and Astrophysics Review, 4,) Honma, F., Matsumoto, R. and Kato, S. Pulsational Instability of Relativistic Accretion Disks and Its Connection to the Periodic X-Ray Time Variability of NGC   Cross-correlation of the X-ray background with nearby galaxies.

NASA Technical Reports Server (NTRS) Jahoda, Keith; Mushotzky, Richard F.; Boldt, Elihu; Lahav, Ofer. RMS Spectral Modelling - a powerful tool to probe the origin of variability in Active Galactic Nuclei. NASA Astrophysics Data System (ADS) Mallick, Labani; Dewangan, Gulab chand; Misra, Ranjeev. The broadband energy spectra of Active Galactic Nuclei (AGN) are very complex in nature with the contribution from many ingredients: accretion disk, corona, jets, broad-line.

Such galactic nuclei are called AGNs (active galactic nuclei), and colloquially the host galaxies themselves which harbor such active nuclei are often referred to as AGNs, since compared to the nucleus the brightness of the rest of the galaxy pales by comparison, to the point that from far away often only the nucleus is detected.

Full text of "ISO surveys of a dusty universe: proceedings of a Ringberg workshop held at Ringberg Castle, Tegernsee, Germany, November " See other formats.

@BOOK{Arago, author = {{Arago}, F. and {Barral}, J.~A.}, title = "{Astronomie populaire}", keywords = {Astronomy}, booktitle = {Astronomie populaire, by Arago, F. a thesis on microquasars - Free ebook download as PDF File .pdf) or read book online for free. PhD thesis on phenomenological study of the correlation between the radio and X-ray emission from microquasars, exploring the disk-jet connection in these sources.

The emphasis of the current study is in understanding the observational features of Cygnus X3 in particular, along with other persistent. Categories. Baby & children Computers & electronics Entertainment & hobby. Brian David Metzger- Theoretical Models of Gamma-Ray Burst Central Engines - Free ebook download as PDF File .pdf), Text File .txt) or read book online for free.

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