Comparing narrow and broad-line AGNs, in a new diagnostic diagram for emission-line galaxies based on WISE data
作者： R. Coziol , J. P. Torres-Papaqui , H. Andernach
DOI: 10.1088/0004-6256/149/6/192
关键词:
摘要: Using a new color-color diagnostic diagram in the mid infrared built from WISE data, MIRDD, we compare narrow emission-line galaxies (NELGs) that exhibit different activity types (star-forming galaxies, SFGs, and AGNs, i.e.,LINERs, Sy2s TOs), with broad-line AGNs (QSOs Sy1s) BL Lac objects at low redshift ($z \le 0.25$). We show occupy MIRDD same region as LINERs, whereas QSOs Sy1s an intermediate region, between LINERs Sy2s.In these trace sequence can be reproduced by power law, $F_\nu = \nu^{\alpha}$, where spectral index, $\alpha$, varies 0 to $-2$, which is similar what observed optical-ultraviolet part of spectra luminosities. For NELGs, perform stellar population synthesis analysis, demonstrating ${\rm W}2-{\rm W}3$ color tightly correlated level star formation their host galaxies. A comparison MIR colors yielded energy distributions (SEDs) types, shows SED SEDs Sy1s, consistent AGN mild formation, TOs are strong components. For objects, only fit has no component, elliptical-type From similarities SEDs, infer that, nearby universe, most probably increases along Lac$\rightarrow$LINER$\rightarrow$QSO/Sy1$\rightarrow$Sy2$\rightarrow$TO$\rightarrow$SFG.
arxiv.org
128.84.21.199参考文章(197)
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