Emission Line Equivalent Widths for AGN Modeling
Abstract
The CLOUDY spectral synthesis code is used to produce contours of equivalent widths for several Balmer, Paschen, and Helium lines, and Lyman-alpha, across a parameter space of hydrogen density and hydrogen-ionizing flux, which are useful to AGN modeling. The locally optimally emitting cloud model integrates line fluxes and cloud distributions across the expected parameters to predict resultant spectra from and properties of the broad line and narrow line regions. Extinction between the nucleus and the BLR and NLR in local Seyfert galaxies is computed by fitting the observed emission line ratios to contours in the parameter space. The line equivalent width and ratio dependencies on metallicity and spectral index, H-I emitting radii, and BLR/NLR extinction ratios are computed from these results. The Seyfert galaxies are classified with greater resolution than the traditional Seyfert 1 and 2 classes by binning according to the BLR/NLR extinction ratios.
- Publication:
-
Walking the Line 2018
- Pub Date:
- March 2018
- DOI:
- 10.5281/zenodo.1209433
- Bibcode:
- 2018wtl..confE...9U
- Keywords:
-
- cloudy;
- agn;
- seyfert;
- seyferts;
- LOC;
- extinction;
- local galaxies;
- Zenodo community walk2018