出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：To shed light on the physical processes that can produce high-energy emission in non-blazar radio galaxy 3C 111 we analyzed both the X-ray spectrum from 0.4 to 200 keV and the spectral energy distribution of this source using archival and previously unpublished data. The combined X-ray spectra from INTEGRAL, Swift and Suzaku are well-represented by an absorbed exponentially cut off power law with reflection from neutral material with a photon index G = 1:680:03, a high-energy cut-off Ecut = 227+143 67 keV, a reflection component with R = 0:7 0:3 and a Gaussian component to account for the iron emission line at 6.4 keV with an equivalent width of EW = 86+18 12 eV. The data from Suzaku, INTEGRAL, Swift and Fermi in the X-ray to g -ray regime, together with archival data in the radio, infrared, and optical band, can be modeled by a single-zone synchrotron self-Compton model without an additional thermal component. We compare our model to the models for another radio galaxy, Cen A, and with a model for the blazar Mrk 421. The parameters which allow to model the spectral energy distribution in the three sources are consistent when considering the different jet power. We suggest a hybrid model to explain the broad-band high-energy emission, including a thermal component (iron line, high-energy cut-off, reflection) and a non-thermal one (an additional thermal component to model the entire SED is not required).
