@article{10902/27338, year = {2009}, url = {https://hdl.handle.net/10902/27338}, abstract = {Active Galactic Nuclei (AGN) play an important role in many aspects of the modern cosmology, and of particular interest is the issue of the interplay between AGN and their host galaxy. Using X?ray and optical data sets, we have explored the properties of a large sample of AGNs in the Subaru/XMM-Newton Deep Survey (SXDS) field, and studied their evolution in relation with the evolution of their host galaxy. We present here an anticorrelation between X?ray-to-optical flux ratio (X/O) and galaxy light concentration (C), which has been found for the first time and might suggest that early type galaxies, having poor matter supply to feed the AGN activity, have lower Eddington rates than those of late type galaxies}, organization = {Acknowledgements: We thank the anonymous referees for a number of valuable comments and suggestions which contributed to improve the quality of this paper. This work was supported by the Spanish Plan Nacional de Astronomía y Astrofísica under grants AYA2008-06311-C02-01 and AYA2008-06311-C02- 02. JIGS acknowledges financial support from the Spanish Ministerio de Educación y Ciencia under grant AYA2005-00055. We acknowledge support from the Faculty of the European Space Astronomy Centre (ESAC). We thank to SXDS team for making available their optical data to the astronomical community. The Millennium II Simulation databases used in this paper and the web application providing online access to them were constructed as part of the activities of the German Astrophysical Virtual Observatory (GAVO). We thank to GAVO and Millennium Simulation team for making public their databases.}, publisher = {Institute of Physics Publishing}, publisher = {Astrophysical Journal 2009, 702 (1 PART 2), L51-L55}, title = {On the Anticorrelation Between Galaxy Light Concentration and X-ray-to-Optical Flux Ratio}, author = {Povi, M. and Sánchez-Porta, l M. and Pérez García, A.M. and Bongiovanni, A. and Cepa, J. and Fernández Lorenzo, M. and Lara-López, M.A. and González Serrano, José Ignacio and Alfaro, E.J.}, }