Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aspc..408..122c&link_type=abstract
The Starburst-AGN Connection. ASP Conference Series, Vol. 408, proceedings of the conference held 27-31 October 2008, at Shangha
Astronomy and Astrophysics
Astronomy
3
Scientific paper
Optical studies of starbursts, AGN and their connections usually leave out galaxies whose emission lines are too weak to warrant reliable measurement and classification. Yet, weak line galaxies abound, and deserve a closer look. We show that these galaxies are either massive, metal rich star-forming systems, or, more often, LINERs. From our detailed stellar population analysis, we find that these LINERs have stopped forming stars long ago. Moreover, their ionizing radiation field is amazingly consistent with that expected from their old stellar populations alone. The black-hole in the centers of these massive, early-type galaxies is not active enough to overwhelm stellar ionization, and thus, despite their looks, they should not be called AGN.
Cid Fernandes Roberto
Gomes Jean Michel
Mateus Abilio
Schlickmann Marielli
Schoenell William
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