The starburst-AGN disconnection - Astrophysics > Astrophysics of GalaxiesReport as inadecuate

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Abstract: Optical studies of starbursts, AGN and their connections usually leave outgalaxies whose emission lines are too weak to warrant reliable measurement andclassification. Yet, weak line galaxies abound, and deserve a closer look. Weshow that these galaxies are either massive, metal rich star-forming systems,or, more often, LINERs. From our detailed stellar population analysis, we findthat these LINERs have stopped forming stars long ago. Moreover, their ionizingradiation field is amazingly consistent with that expected from their oldstellar populations alone. The black-hole in the centers of these massive,early-type galaxies is not active enough to overwhelm stellar ionization, andthus, despite their looks, they should not be called AGN.

Author: R. Cid Fernandes 1,2, M. Schlickmann 1, G. Stasinska 2, N. Vale Asari 1,2, J. M. Gomes 1,3, W. Schoenell 1, A. Mateus 4, L. Sodre


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