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Demographics and environment of AGN from multi-wavelength surveys

Fecha: 
De 21/09/2015 hasta 24/09/2015
Lugar: 
Chania, Crete, Greece

SOC M. Cappi, F. Carrera, T. Di Matteo, M. Elitzur, M. Elvis, A. Finoguenov, R. Gilli, R. Hickox, K. Nandra, A. Merloni, J. Mullaney, R. Sommerville, D. Stern, J. Trump LOC I. Georgantopoulos, V. Charmandaris, A. Georgakakis, A. Akylas, G. Mountrichas, E. Koulouridis

Rationale

Our understanding of the formation of supermassive black holes at the centres of galaxies has developed significantly in the last years as a result of new observational data and improvements in numerical methods for simulating the growth of black holes within galaxies. There are new pieces of evidence and novel ideas on the relation between accretion events onto supermassive black holes and the formation of stars in AGN hosts, the physics of AGN feedback and its importance for shaping galaxies and the large-scale structures in the Universe, the contribution of diverse AGN triggering mechanisms to the growth of black holes. Although an exciting debate is ongoing on the above points, there is a general consensus in the community that further progress requires a multi-wavelength approach and an interplay between theory and observation. AGN have diverse Spectral Energy Distributions that depend among others on line-of-sight obscuration or the physical conditions in the vicinity of the central engine. Selection at different parts of the electromagnetic spectrum is therefore essential to reduce systematics and to yield least biased AGN samples for population investigations. Multi-wavelength datasets are also needed to explore the host galaxy properties and the environments of AGN samples and link accretion properties with physical conditions on larger scales. The observational results can be significantly enhanced when coupled with numerical simulations. These provide both a physical framework for the interpretation of data and a tool for understanding potential sources of systematics affecting observations. It is the aim of this conference to review and discuss the most recent observational and modelling developments on the study of AGN accretion physics, AGN evolution and co-evolution with galaxies.

Specific topics that will be discussed are:

I. Constraints on the accretion history of the Universe * AGN luminosity functions from the local Universe to early times * Constraints on the obscuration distribution of AGN * The contribution of the most heavily obscured, Compton thick, AGN to black hole growth. * Multi-wavelength AGN selection methods.

II. AGN demographics as a function of redshift * Links between the accretion and star-formation histories of the Universe AGN triggering mechanisms * AGN feedback and impact on host galaxy * Exploring the Eddington ratio distribution of AGN as a function of host galaxy properties.

III. Position of AGN on the cosmic web * Distribution of AGN in dark matter halos * Content and demographics of AGN in clusters and groups vs field. * Impact of AGN on the intra-cluster medium * Unification

IV. Simulations vs Observations * Semi-Analytic models of AGN evolution * Hydro simulations of black hole growth * Physics of black hole fuelling Simulations of AGN feedback processes

Abstract submission deadline: 15th June 2015

Early registration deadline: 15th July 2015

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