Clustering of X-Ray-Selected AGN
The study of the angular and spatial structure of the X-ray sky has been under investigation since the times of the Einstein X-ray Observatory. This topic has fascinated more than two generations of scientists and slowly unveiled an unexpected scenario regarding the consequences of the angular and s...
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| Format: | Article |
| Language: | English |
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Wiley
2012-01-01
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| Series: | Advances in Astronomy |
| Online Access: | http://dx.doi.org/10.1155/2012/853701 |
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| author | N. Cappelluti V. Allevato A. Finoguenov |
| author_facet | N. Cappelluti V. Allevato A. Finoguenov |
| author_sort | N. Cappelluti |
| collection | DOAJ |
| description | The study of the angular and spatial structure of the X-ray sky has been under investigation since the times of the Einstein X-ray Observatory. This topic has fascinated more than two generations of scientists and slowly unveiled an unexpected scenario regarding the consequences of the angular and spatial distribution of X-ray sources. It was first established from the clustering of sources making the CXB that the source spatial distribution resembles that of optical QSO. It then became evident that the distribution of X-ray AGN in the Universe was strongly reflecting that of Dark Matter. In particular, one of the key results is that X-ray AGNs are hosted by dark matter halos of mass similar to that of galaxy groups. This result, together with model predictions, has lead to the hypothesis
that galaxy mergers may constitute the main AGN-triggering mechanism. However, detailed analysis of observational data, acquired with modern telescopes, and the use of the new halo occupation formalism has revealed that the triggering of an AGN could also be attributed to phenomena-like tidal disruption or disk instability and to galaxy evolution. This paper reviews results from 1988 to 2011 in the field of X-ray-selected AGN clustering. |
| format | Article |
| id | doaj-art-913bdd61e12d45c6b9e9e12b29c684f1 |
| institution | Kabale University |
| issn | 1687-7969 1687-7977 |
| language | English |
| publishDate | 2012-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Astronomy |
| spelling | doaj-art-913bdd61e12d45c6b9e9e12b29c684f12025-02-03T06:01:37ZengWileyAdvances in Astronomy1687-79691687-79772012-01-01201210.1155/2012/853701853701Clustering of X-Ray-Selected AGNN. Cappelluti0V. Allevato1A. Finoguenov2Osservatorio Astronomico di Bologna, INAF, Via Ranzani 1, 40127 Bologna, ItalyMax-Planck-Institut für Plasmaphysik and Excellence Cluster Universe, Boltzmannstrasse 2, 85748 Garching, GermanyUniversity of Maryland, Baltimore County, 1000 Hilltop Circle, Baltimore, MD 21250, USAThe study of the angular and spatial structure of the X-ray sky has been under investigation since the times of the Einstein X-ray Observatory. This topic has fascinated more than two generations of scientists and slowly unveiled an unexpected scenario regarding the consequences of the angular and spatial distribution of X-ray sources. It was first established from the clustering of sources making the CXB that the source spatial distribution resembles that of optical QSO. It then became evident that the distribution of X-ray AGN in the Universe was strongly reflecting that of Dark Matter. In particular, one of the key results is that X-ray AGNs are hosted by dark matter halos of mass similar to that of galaxy groups. This result, together with model predictions, has lead to the hypothesis that galaxy mergers may constitute the main AGN-triggering mechanism. However, detailed analysis of observational data, acquired with modern telescopes, and the use of the new halo occupation formalism has revealed that the triggering of an AGN could also be attributed to phenomena-like tidal disruption or disk instability and to galaxy evolution. This paper reviews results from 1988 to 2011 in the field of X-ray-selected AGN clustering.http://dx.doi.org/10.1155/2012/853701 |
| spellingShingle | N. Cappelluti V. Allevato A. Finoguenov Clustering of X-Ray-Selected AGN Advances in Astronomy |
| title | Clustering of X-Ray-Selected AGN |
| title_full | Clustering of X-Ray-Selected AGN |
| title_fullStr | Clustering of X-Ray-Selected AGN |
| title_full_unstemmed | Clustering of X-Ray-Selected AGN |
| title_short | Clustering of X-Ray-Selected AGN |
| title_sort | clustering of x ray selected agn |
| url | http://dx.doi.org/10.1155/2012/853701 |
| work_keys_str_mv | AT ncappelluti clusteringofxrayselectedagn AT vallevato clusteringofxrayselectedagn AT afinoguenov clusteringofxrayselectedagn |