Abstract
Low Luminosity Active Galactic Nuclei (LLAGN), which comprise low-ionization nuclear emission-line regions (LINERs) and transition-type objects (TOs), represent the most common type of nuclear activity. Here, we search for spectroscopic signatures of starbursts and post-starbursts in LLAGN, and investigate their relationship to the ionization mechanism in LLAGN. The method used is based on the stellar population synthesis of the circumnuclear optical continuum of these galaxies. We have found that intermediate-age populations (108 – 109 yr) are very common in weak-[Oi] LLAGN, but that very young stars (≤ 107 yr) contribute very little to the central optical continuum of these objects. However, ∼ 1 Gyr ago these nuclei harboured starbursts of size ∼ 100 pc and masses 107–108 M⊙. Meanwhile, most of the strong-[Oi] LLAGN have predominantly old stellar populations.
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