Cosmological Evolution of the Central Engine in High-Luminosity, High-Accretion Rate AGN
In this paper I discuss the status of observational studies aiming at probing the cosmological evolution of the central engine in high-luminosity, high-accretion rate Active Galactic Nuclei (AGN). X-ray spectroscopic surveys, supported by extensive multi-wavelength coverage, indicate a remarkable in...
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| Format: | Article |
| Language: | English |
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Czech Technical University in Prague
2014-12-01
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| Series: | Acta Polytechnica CTU Proceedings |
| Online Access: | https://ojs.cvut.cz/ojs/index.php/APP/article/view/2352 |
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| _version_ | 1850092545758986240 |
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| author | Matteo Guainazzi |
| author_facet | Matteo Guainazzi |
| author_sort | Matteo Guainazzi |
| collection | DOAJ |
| description | In this paper I discuss the status of observational studies aiming at probing the cosmological evolution of the central engine in high-luminosity, high-accretion rate Active Galactic Nuclei (AGN). X-ray spectroscopic surveys, supported by extensive multi-wavelength coverage, indicate a remarkable invariance of the accretion disk plus corona system, and of their coupling up to redshifts z≈6. Furthermore, hard X-ray (<em>E</em> >10 keV) surveys show that nearby Seyfert Galaxies share the same central engine notwithstanding their optical classication. These results suggest that the high-luminosity, high accretion rate quasar phase of AGN evolution is homogeneous over cosmological times. |
| format | Article |
| id | doaj-art-1ded1d07795b4a858e32427d8a0ddc39 |
| institution | DOAJ |
| issn | 2336-5382 |
| language | English |
| publishDate | 2014-12-01 |
| publisher | Czech Technical University in Prague |
| record_format | Article |
| series | Acta Polytechnica CTU Proceedings |
| spelling | doaj-art-1ded1d07795b4a858e32427d8a0ddc392025-08-20T02:42:07ZengCzech Technical University in PragueActa Polytechnica CTU Proceedings2336-53822014-12-0111909510.14311/APP.2014.01.00902164Cosmological Evolution of the Central Engine in High-Luminosity, High-Accretion Rate AGNMatteo Guainazzi0European Space Astronomy Centre (ESAC), P.O. Box, 78, E-28691 Villanueva de la Cañada, MadridIn this paper I discuss the status of observational studies aiming at probing the cosmological evolution of the central engine in high-luminosity, high-accretion rate Active Galactic Nuclei (AGN). X-ray spectroscopic surveys, supported by extensive multi-wavelength coverage, indicate a remarkable invariance of the accretion disk plus corona system, and of their coupling up to redshifts z≈6. Furthermore, hard X-ray (<em>E</em> >10 keV) surveys show that nearby Seyfert Galaxies share the same central engine notwithstanding their optical classication. These results suggest that the high-luminosity, high accretion rate quasar phase of AGN evolution is homogeneous over cosmological times.https://ojs.cvut.cz/ojs/index.php/APP/article/view/2352 |
| spellingShingle | Matteo Guainazzi Cosmological Evolution of the Central Engine in High-Luminosity, High-Accretion Rate AGN Acta Polytechnica CTU Proceedings |
| title | Cosmological Evolution of the Central Engine in High-Luminosity, High-Accretion Rate AGN |
| title_full | Cosmological Evolution of the Central Engine in High-Luminosity, High-Accretion Rate AGN |
| title_fullStr | Cosmological Evolution of the Central Engine in High-Luminosity, High-Accretion Rate AGN |
| title_full_unstemmed | Cosmological Evolution of the Central Engine in High-Luminosity, High-Accretion Rate AGN |
| title_short | Cosmological Evolution of the Central Engine in High-Luminosity, High-Accretion Rate AGN |
| title_sort | cosmological evolution of the central engine in high luminosity high accretion rate agn |
| url | https://ojs.cvut.cz/ojs/index.php/APP/article/view/2352 |
| work_keys_str_mv | AT matteoguainazzi cosmologicalevolutionofthecentralengineinhighluminosityhighaccretionrateagn |