**title** Asp Conference Series, Vol. **volume**, **publication Year** **editors** Host Galaxies of Agn
نویسنده
چکیده
The relationship of an AGN to its host galaxy is a crucial question in the study of galaxy evolution. We perform stellar population synthesis in the central regions of galaxies of different activity levels. A large number of stellar features are measured both in the optical and near-infrared. We find the nuclear stellar population to be related to the level of activity. These differences are no more conspicuous further away in the bulge of the galaxy.
منابع مشابه
**title** Asp Conference Series, Vol. **volume**, **publication Year** **editors** Obscured Accretion and Black Holes
The evidence for obscured AGN and in particular for obscured quasars is discussed. The spectrum and source modelling of the X-ray Background suggests that most massive black holes grow by obscured accretion. A possible major growth phase which is Compton thick is explored and shown to be difficult to detect directly with current instruments .
متن کامل**title** Asp Conference Series, Vol. **volume***, **year of Publication** **names of Editors**
The properties of radio loud active galaxies (radiogalaxies, BL Lac objects and radio loud quasar) at low and high redshift are briefly reviewed and compared. The recently derived empirical relations between central black hole mass and host properties allow one to explore the demographics of massive black hole in active galaxies. It is shown that all classes of active galaxies considered exhibi...
متن کامل**title** Asp Conference Series, Vol. **volume**, **publication Year** **editors**
An analysis of the cluster environments around distant radio galaxies is presented, in particular the results from new NTT deep optical–IR imaging of the fields of radio sources at z ∼ 1.6. A net overdensity of K–band galaxies is found, together with a sharp peak in the angular cross–correlation amplitude, centred on the radio galaxies. This excess clustering is associated predominantly with re...
متن کامل**title** Asp Conference Series, Vol. **volume**, **publication Year** **editors** Nir and Optical Structural Parameters of Galaxies in the Cluster Ac118 at Z=0.31
We present some preliminary results related to a project aimed at studying the evolution of the galaxy population in rich environments by means of the Color-Magnitude relation and of the Fundamental Plane. We derive the NIR and optical structural parameters for a sample of galaxies in the cluster AC118 at z=0.31. We prove that reliable structural parameters of galaxies at z∼0.3 can be still der...
متن کامل**title** Asp Conference Series, Vol. **volume***, **year of Publication** **names of Editors** Tidal Streams around External Galaxies
We have the unique opportunity to observe and model nearby streams around the two large Local Group spirals Milky Way and M31 in great detail. However, the detection of streams around other external galaxies is required to verify the general application of the derived results. We give a short summary of streams around other galaxies known in the literature, measuring for the first time the surf...
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تاریخ انتشار 2001