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Cosmological Evolution of the Central Engine in High-Luminosity, High-Accretion Rate AGN
- Source :
- Acta Polytechnica CTU Proceedings, Vol 1, Iss 1, Pp 90-95 (2014)
- Publication Year :
- 2014
- Publisher :
- CTU Central Library, 2014.
-
Abstract
- 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 (E >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.
- Subjects :
- Engineering (General). Civil engineering (General)
TA1-2040
Subjects
Details
- Language :
- English
- ISSN :
- 23365382
- Volume :
- 1
- Issue :
- 1
- Database :
- Directory of Open Access Journals
- Journal :
- Acta Polytechnica CTU Proceedings
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.1ded1d07795b4a858e32427d8a0ddc39
- Document Type :
- article
- Full Text :
- https://doi.org/10.14311/APP.2014.01.0090