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Searching for Super-Eddington Quasars using a Photon Trapping Accretion Disc Model
Quentin Pognan, Benny Trakhtenbrot, Tullia Sbarrato +2
Accretion onto black holes at rates above the Eddington limit has long been discussed in the context of supermassive black hole (SMBH) formation and evolution, providing a possible…
An extremely X--ray weak blazar at z=5
S. Belladitta, A. Moretti, A. Caccianiga +5
We present the discovery and properties of DESJ014132.4-542749.9 (DES0141-54), a new powerful radio-loud active galactic nucleus (AGN) in the early Universe (z=5.0). It was discove…
Estimating black hole masses: Accretion disk fitting versus reverberation mapping and single epoch
Samuele Campitiello, Annalisa Celotti, Gabriele Ghisellini +1
We selected a sample of 28 Type 1 AGNs for which a black hole mass has been inferred using the reverberation mapping technique and single epoch scaling relations. All 28 sources sh…
A NuSTAR view of powerful gamma-ray loud blazars
G. Ghisellini, M. L. Perri, G. Costamante +6
We observed with the NuSTAR satellite 3 blazars at z>2, detected in gamma-rays by Fermi/LAT and in the soft X-rays, but not yet observed above 10 keV. The flux and slope of their X…