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Low-luminosity active galactic nuclei (LLAGNs) represent the bulk of the AGNpopulation in the present-day universe and they trace the low-level accretingsupermassive black holes. In order to probe the accretion and jet physicalproperties in LLAGNs as a class, we model the broadband radio to X-raysspectral energy distributions (SEDs) of 21 LLAGNs in low-ionization nuclearemission-line regions (LINERs) with a coupled accretion-jet model. Theaccretion flow is modeled as an inner ADAF outside of which there is atruncated standard thin disk. We find that the radio emission is severelyunderpredicted by ADAF models and is explained by the relativistic jet. Theorigin of the X-ray radiation in most sources can be explained by threedistinct scenarios: the X-rays can be dominated by emission from the ADAF, orthe jet, or the X-rays can arise from a jet-ADAF combination in which bothcomponents contribute to the emission with similar importance. For 3 objectsboth the jet and ADAF fit equally well the X-ray spectrum and can be thedominant source of X-rays whereas for 11 LLAGNs a jet-dominated model accountsbetter than the ADAF-dominated model for the data. The individual and averageSED models that we computed can be useful for different studies of the nuclearemission of LLAGNs. From the model fits, we estimate important parameters ofthe central engine powering LLAGNs in LINERs, such as the mass accretion rateand the mass-loss rate in the jet and the jet power - relevant for studies ofthe kinetic feedback from jets.

Spectral Energy Distribution Models for Low-luminosity Active Galactic Nuclei in LINERs