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326 papers · 2 filters
Radio-loud AGNs at high redshifts and the cosmic microwave background
G. Ghisellini, A. Celotti, F. Tavecchio +2
We discuss how the interaction between the electrons in a relativistic jet and the Cosmic Microwave Background (CMB) affects the observable properties of radio-loud AGN at early ep…
Diffuse optical intracluster light as a measure of stellar tidal stripping: the cluster CL0024+17 at 0.4 observed at LBT
E. Giallongo, N. Menci, A. Grazian +9
We have evaluated the diffuse intracluster light (ICL) in the central core of the galaxy cluster CL0024+17 at observed with the prime focus camera (LBC) at LBT. The mea…
Probing photon decay with the Sunyaev-Zel'dovich effect
S. Colafrancesco, P. Marchegiani
The fundamental properties of the photon have deep impact on the astrophysical processes that involve it, like the inverse Compton scattering of CMB photon by energetic electrons r…
A Comparison between Semi-Analytic Model Predictions for the CANDELS Survey
Yu Lu, Risa H. Wechsler, Rachel S. Somerville +13
We compare the predictions of three independently developed semi-analytic galaxy formation models that are being used to aid in the interpretation of results from the CANDELS surve…
AGN X-ray variability in the XMM-COSMOS survey
G. Lanzuisi, G. Ponti, M. Salvato +18
We took advantage of the observations carried out by XMM in the COSMOS field during 3.5 years, to study the long term variability of a large sample of AGN (638 sources), in a wide…
Multi-frequency constraints on the non-thermal pressure in galaxy clusters
S. Colafrancesco, M. S. Emritte, N. Mhlahlo +1
The origin of radio halos in galaxy clusters is still unknown and is the subject of a vibrant debate both from the observational and theoretical point of view. In particular the am…