XMMSDSS

Understanding the evolution of Active Galactic Nuclei

Coordinatore	NATIONAL OBSERVATORY OF ATHENS    more  Organization address address: Lofos Nymfon city: ATHINA postcode: 11810 contact info Titolo: Ms. Nome: Ioanna Cognome: Kolliakou Email: send email Telefono: +30 210 32 56 225 Fax: +30 210 32 56 212
Nazionalità Coordinatore	Greece [EL]
Totale costo	45˙000 €
EC contributo	45˙000 €
Programma	FP7-PEOPLE Specific programme "People" implementing the Seventh Framework Programme of the European Community for research, technological development and demonstration activities (2007 to 2013)
Code Call	FP7-PEOPLE-ERG-2008
Funding Scheme	MC-ERG
Anno di inizio	2009
Periodo (anno-mese-giorno)	2009-02-01   -   2012-01-31

 Partecipanti

#	participant	country	role	EC contrib. [€]
1	NATIONAL OBSERVATORY OF ATHENS  Organization address address: Lofos Nymfon city: ATHINA postcode: 11810 contact info Titolo: Ms. Nome: Ioanna Cognome: Kolliakou Email: send email Telefono: +30 210 32 56 225 Fax: +30 210 32 56 212	EL (ATHINA)	coordinator	45˙000.00

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 Obiettivo del progetto (Objective)

'It is well established that the population of Active Galactic Nuclei (AGN), which are powered by accretion on supermassive black holes (SBH) at the centres of galaxies, has declined dramatically in the last 7 Gyrs of cosmic time (from z=1 to z=0). Elucidating the physical mechanism responsible for this rapid evolution remains a challenge for astronomy, despite over 35 years of investigations. It is the ambitious but realistic goal of this proposal to address this long-standing problem. A recent development that promises a breakthrough in the field has been the realisation that in order to understand active SBHs we need to study them in relation to their host galaxies. At high redshift (z~1) for example, there is currently a wealth of information on the nature of AGN hosts that provide important clues on the physical conditions under which accretion on SBHs occurs. Such studies have to be performed over a wide redshift baseline however, if we hope to get a handle on the physics behind AGN evolution. Unfortunately, although a huge amount of resources has been devoted to observations of the deep Universe, there is currently no systematic effort to complement them at low redshift. This proposal will bridge this gap by compiling the largest sample of X-ray selected AGN at z~0.1 to study the properties of their hosts, including their (i) star-formation history, (ii) stellar mass and (iii) large scale environment. A unique feature of the proposed program is that the AGN selection is almost identical to high redshift surveys, thereby allowing direct comparison of the samples. The proposed survey at z~0.1 will be combined with similar programs at z~1 to perform, for the first time, redshift dependent studies of the conditions under which AGN occur, thereby placing tight constraints on the physics that govern the accretion history of the Universe.'