155 articles – 1965 Notices  [english version]
HAL : in2p3-00320577, version 1

Fiche détaillée  Récupérer au format
Monthly Notices of the Royal Astronomical Society 388 (2008) 1037-1046
Exploring the disc/jet interaction in the radio-loud quasar 4C +74.26 with Suzaku
J. Larsson1, A.C. Fabian1, D.R. Ballantyne2, G. Miniutti1, 3

We report on a 90 ks Suzaku observation of the radio-loud quasar 4C +74.26. The source was observed in its highest flux state to date, and we find that it brightened by about 20 per cent during the observation. We see evidence of spectral hardening as the count rate increases and also find that the rms variability increases with energy up to about 4 keV. We clearly detect a broadened Fe line but conclude that it does not require any emission from inside about 50 r_g, although a much smaller inner radius cannot be ruled out. The large inner radius of our best fit implies that the inner disc is either missing or not strongly illuminated. We suggest that the latter scenario may occur if the power-law source is located high above the disc, or if the emission is beamed away from the disc.
1 :  Institute of Astronomy
2 :  University of Arizona
3 :  APC - UMR 7164 - AstroParticule et Cosmologie
Physique/Astrophysique/Cosmologie et astrophysique extra-galactique

Planète et Univers/Astrophysique/Cosmologie et astrophysique extra-galactique
Lien vers le texte intégral :