Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aas...201.1110m&link_type=abstract
American Astronomical Society, 201st AAS Meeting, #11.10; Bulletin of the American Astronomical Society, Vol. 34, p.1110
Astronomy and Astrophysics
Astronomy
Scientific paper
The emission line spectra of active galactic nuclei fall into three main categories: star formation nuclei (or HII regions), Seyfert nuclei, or LINERs (low ionization narrow emission-line regions). A subset of these galactic nuclei has intermediate characteristics between LINERs and HII regions. These so-called transition objects (Ho et al. 1993) were subject of numerous studies in the past, but their true nature has remained elusive. We generated photoionization models that can account consistently for all the process that are relevant: photoionization by stars, shocks, dust, and a power-law radiation spectrum. The Starbust99 code was updated to produce a realistic stellar continuum from the EUV to the optical and coupled to the Mappings photoionization code to account for all the processes in a consistent way. Initial results from our simulations and a comparison to observed spectra are presented.
Leitherer Cl.
Martins Lucimara P.
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