Results 241 to 250 of about 78,490 (277)
Physics Bulletin, 1980 C Hazard and S Mitton (eds) 1979 Cambridge: Cambridge University Press vii + 317 pp price £15 This book provides an extensive review of mainstream theoretical work on quasars and the nuclei of active galaxies. It is based on invited presentations to the Nato Cambridge conference of summer 1977.
openaire +1 more source
Some of the next articles are maybe not open access.
Related searches:
Related searches:
2012
This AGN textbook gives an overview on the current knowledge of the Active Galactic 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.
Beckmann, Volker, Shrader, Chris R.
openaire +3 more sources
This AGN textbook gives an overview on the current knowledge of the Active Galactic 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.
Beckmann, Volker, Shrader, Chris R.
openaire +3 more sources
2014
So far, we have discussed the radio continuum (specifically: the synchrotron) emission of normal, i.e. star-forming galaxies, along with their magnetic field. As pointed out in Sect. 5.5, their synchrotron luminosity is closely associated with the star formation in their disks, this giving rise to the well-known radio-FIR correlation established for ...
Andrew Fletcher, Ulrich Klein
openaire +4 more sources
So far, we have discussed the radio continuum (specifically: the synchrotron) emission of normal, i.e. star-forming galaxies, along with their magnetic field. As pointed out in Sect. 5.5, their synchrotron luminosity is closely associated with the star formation in their disks, this giving rise to the well-known radio-FIR correlation established for ...
Andrew Fletcher, Ulrich Klein
openaire +4 more sources
Astrophysics and Space Science, 1995 The term Active Galactic Nuclei includes QSOs (Quasi-Stellar Objects), Seyfert galaxies, BL Lac objects and nuclei showing unusual amounts of star formation. South African work has centred on the photometric properties of these objects, both in the optical(UBVRI) and the infrared(JHKL). Photometry has been used to investigate the nature of the relevant
openaire +1 more source
Reports on Progress in Physics, 1989
Recent observational and theoretical investigations of AGN are reviewed. The basic AGN characteristics (broad emission lines of abundant ions, X-ray emission, and a sharp starlike appearance) are summarized, and particular attention is given to the spectral classification of Seyfert galaxies, the AGN velocity fields and their measurement, low ...
openaire +3 more sources
Recent observational and theoretical investigations of AGN are reviewed. The basic AGN characteristics (broad emission lines of abundant ions, X-ray emission, and a sharp starlike appearance) are summarized, and particular attention is given to the spectral classification of Seyfert galaxies, the AGN velocity fields and their measurement, low ...
openaire +3 more sources
1990
The Swiss Society for Astrophysics and Astronomy organizes each year in the late winter or early spring an advanced course. The format of the school is always iden tical: three leading lecturers are invited to cover the subject in nine or ten lectures each and to deliver a written version of their lecture notes.
Blandford, R. D. +2 more
openaire +2 more sources
The Swiss Society for Astrophysics and Astronomy organizes each year in the late winter or early spring an advanced course. The format of the school is always iden tical: three leading lecturers are invited to cover the subject in nine or ten lectures each and to deliver a written version of their lecture notes.
Blandford, R. D. +2 more
openaire +2 more sources
1987
Well before the discovery of quasars, a special class of galaxies was known to harbor unusually powerful nuclei (Seyfert, 1943). Two primary defining characteristics of these active galactic nuclei (AGNs) are an intense point-like nuclear continuum source and strong, broad emission lines, neither of which could arise from ordinary stellar processes ...
Matthew A. Malkan +2 more
openaire +2 more sources
Well before the discovery of quasars, a special class of galaxies was known to harbor unusually powerful nuclei (Seyfert, 1943). Two primary defining characteristics of these active galactic nuclei (AGNs) are an intense point-like nuclear continuum source and strong, broad emission lines, neither of which could arise from ordinary stellar processes ...
Matthew A. Malkan +2 more
openaire +2 more sources
The Masses of Active Galactic Nuclei
Vistas in Astronomy, 1988The study of the variability of the X-ray radiation in AGNs on time scales of 102 to 105sec is of fundamental importance for understanding the nature of their central source. Recently Wandel & Mushotzky [1] determined the masses of AGNs from their X-ray variability assuming the emitting region of X-rays to be five Schwarzschild radii.
openaire +3 more sources
2021
Almost all galaxies host in their center a supermassive black hole of mass between a million and tens of billions solar masses. Supermassive black holes grow in symbiosis with their host galaxies across the Hubble time, occasionally accreting surround matter, giving rise to an Active Galactic Nuclei (AGN).
openaire +2 more sources
Almost all galaxies host in their center a supermassive black hole of mass between a million and tens of billions solar masses. Supermassive black holes grow in symbiosis with their host galaxies across the Hubble time, occasionally accreting surround matter, giving rise to an Active Galactic Nuclei (AGN).
openaire +2 more sources
Active galactic nuclei in the ultraviolet
Astrophysics and Space Science, 2007The frontier for ultraviolet studies of active galactic nuclei is the time domain: in particular, reverberation mapping of the broad emission-line region can lead to determination of the geometry and kinematics of accretion flows and winds as well as accurate measurement of the masses of the central black holes.
openaire +2 more sources