Juan Pablo Torres Papaqui

Instuto Nacional de Astrofisica, Optica y Electronica (INAOE)

Poster Title: Determination of nuclear SB ages in Seyfert galaxies

Abstract: We present optical/near UV spectra of nuclear regions of Seyfert galaxies over the wavelength region 3600-5300 \AA. Many Seyferts, both type 2 and type 1 show the direct spectroscopic signature of high-order Balmer absorption lines in the near-UV. This signature is a strong evidence of the presence of recent star formation in the nuclear region of these galaxies. We applied a new method to determine ages of the stellar population of Seyfert galaxies. This method consists of the direct comparison of the profiles of the high-order Balmer and Ca K absorption lines with starburst spectral models at high resolution. We obtain strong evidence of starbursts in Seyfert nuclei supporting some kind of connection between starburst and AGN activity, but it is not yet demonstrated that starburts are present in all AGNs. If a strong connection exists, this would bear important implications for theories of AGN formation and their role in galaxy formation.

Link to poster: N/A