455 citations · 1.2k across the 23 of their papers we have counts for
7 papers · 1 filter
Bulk Comptonization spectra in blazars
Annalisa Celotti, Gabriele Ghisellini, Andrew C. Fabian
We study the time dependent spectra produced via the bulk Compton process by a cold, relativistic shell of plasma moving (and accelerating) along the jet of a blazar, scattering on…
Radiative pressure feedback by a quasar in a galactic bulge
A. C. Fabian, A. Celotti, M. C. Erlund
We show that Eddington-limited black hole luminosities can be sufficient to deplete a galaxy bulge of gas through radiation pressure, when the ionization state of the gas and the p…
Multiwavelength Observations of the BL Lacertae Object PKS 2155-304 with XMM-Newton
Y. H. Zhang, J. M. Bai, S. N. Zhang +3
The optical-UV and X-ray instruments on-board XMM-Ndewton provide an excellent opportunity to perform simultaneous observations of violently variable objects over a broad wavelengt…
On the radio properties of the highest redshift quasars
M. Cirasuolo, M. Magliocchetti, G. Gentile +3
We present deep radio observations of the most distant complete quasar sample drawn from the Sloan Digital Sky Survey. Combining our new data with those from literature we obtain a…
Extended inverse-Compton emission from distant, powerful radio galaxies
M. C. Erlund, A. C. Fabian, Katherine M. Blundell +2
We present Chandra observations of two relatively high redshift FRII radio galaxies, 3C 432 and 3C 191 (z=1.785 and z=1.956 respectively), both of which show extended X-ray emissio…
GRB 990413: Insight into the thermal phase evolution
Z. Bosnjak, A. Celotti, G. Ghirlanda
GRB 990413 shows a very hard spectrum (with a low energy spectral component F(E) \propto E^{2.49}) which is well represented by a black body model with characteristic temperature ~…