Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004mas..conf..403t&link_type=abstract
MULTIWAVELENGTH AGN SURVEYS. Proceedings of the Guillermo Haro Conference 2003. Held 8-12 December 2003 in Cozumel, Mexico. Edit
Astronomy and Astrophysics
Astronomy
Scientific paper
We have obtained optical-near UV spectra of nuclear regions of Seyfert galaxies over the wavelength region 3600-5300 Å. We find that many Seyferts, both type 1 and type 2 show the high-order Balmer lines in absorption. The detection of these Balmer absorptions constitute a strong evidence of the presence of recent star formation in the nuclear region of these active galaxies. While this finding supports some kind of connection between starburst and AGN activity it is not yet clear that starburts are present in all AGNs and what ages do they have. If such a connection exists, it would bear important implications for theories of AGN formation and their role in galaxy formation and evolution. We present a new method to determine ages of the stellar populations in the nuclei of Seyfert galaxies where dilution plays a major role. Our method is based on the comparison of the profiles of the high-order Balmer and Ca K absorption lines with our high spectral resolution synthesis models. The profile comparison method is insensitive to the dilution that affects the traditional spectral analysis methods.
Terlevich Elena
Terlevich Robert
Torres-Papaqui Juan Pablo
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