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Abstract: The James Webb Space Telescope (JWST), due to launch in 2014, shall provide an unprecedented wealth of information in the near and mid-infrared wavelengths, thanks to its high-sensitivity instruments and its 6.5m primary mirror, the largest ever launched into space. NIRSpec and MIRI, the two spectrographs onboard JWST, will play a key role in the study of the spectral features of Active Galactic Nuclei in the 0.6–28μm wavelength range. This article aims at presenting an overview of the possibilities provided by these two instruments, in order to prepare the astronomical community for the JWST era. [Copyright &y& Elsevier]

Low-luminosity AGNs (LLAGNs) are a very important class of sources since they occur in a significant fraction of local galaxies. Their spectra differ significantly from the canonical luminous AGNs, most notably by the absence of the ‘big blue bump’. Up until now there is no model which can explain the spectra of LLAGNs. Taking NGC 4258 as an example, we propose a coupled jet-disk model for some LLAGNs. [Copyright &y& Elsevier]