The optical vs. mid-infrared spectral properties of 82 Type 1 AGNs: coevolution of AGN and starburst

Abstract

We investigated the connection between the mid-infrared (MIR) and optical spectral characteristics in a sample of 82 Type 1 active galactic nuclei (AGNs), observed with Infrared Spectrometer on Spitzer (IRS) and Sloan Digital Sky Survey (SDSS, DR12). We found several interesting correlations between optical and MIR spectral properties: i) as starburst significators in MIR increase, the EWs of optical lines H$\beta$NLR and FeII, increase as well; ii) as MIR spectral index increases, EW([OIII]) decreases, while fractional contribution of AGN (RAGN) is not connected with EW([OIII]); iii) The log([OIII]5007/$\mathrm{H}\beta$NLR) ratio is weakly related to the fractional contribution of polycyclic aromatic hydrocarbons (RPAHs). We compare the two different MIR and optical diagnostics for starburst contribution to the overall radiation (RPAH and BPT diagram, respectively). The significant differences between optical and MIR starburst diagnostics were found. The starburst influence to observed correlations between optical and MIR parameters is discussed.

Accepted to MNRAS

References in corpus (24)

• The diversity of quasars unified by accretion and orientation
• Broad-line Balmer Decrements in Blue Active Galactic Nuclei
• The distribution of silicate strength in Spitzer spectra of AGNs and ULIRGs
• 9.7 um Silicate Features in AGNs: New Insights into Unification Models
• The flux ratio of the [OIII] 5007,4959 lines in AGN: Comparison with theoretical calculations
• Spitzer/IRS 5-35 um Low-Resolution Spectroscopy of the 12 um Seyfert Sample
• Nuclear 11.3$\mu$m PAH emission in local active galactic nuclei
• Hbeta Profiles in Quasars: Evidence for an Intermediate-line Region
• Restframe Optical Spectroscopic Classifications for Submillimeter Galaxies
• Spitzer/IRS Observations of Seyfert 1.8s and 1.9s: A Comparison with Seyfert 1s and Seyfert 2s
• Resolving the AGN and host emission in the mid-infrared using a model-independent spectral decomposition
• Orientation effects on spectral emission features of quasars
• Spitzer Spectra of a 10 mJy Galaxy Sample and the Star Formation Rate in the Local Universe
• Evolutive Unification in Composite Active Galactic Nuclei
• AGN-starburst evolutionary connection : a physical interpretation based on radiative feedback
• The nuclear and extended mid-infrared emission of Seyfert galaxies
• 3D Spectroscopic Study of the Line Emitting Regions of Mrk 493
• VISIR/VLT mid-infrared imaging of Seyfert nuclei: Nuclear dust emission and the Seyfert-2 dichotomy
• Analysis of Spitzer-IRS spectra of hyperluminous infrared galaxies
• Single-Epoch Black Hole Mass Estimators For Broad-Line Active Galactic Nuclei: Recalibrating Hbeta with A New Approach
• Extending the Eigenvector 1 Space to the Optical Variability of Quasars
• The physical properties of Spitzer/IRS galaxies derived from their UV to 22 $\mu$m spectral energy distribution
• The Correlation Between Spectral Index And Accretion Rate For AGN
• The Mid-Infrared Luminosity Evolution and Luminosity Function of Quasars with SDSS and WISE

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• SDSS-IV MaNGA: Identification and Multiwavelength Properties of Type-1 AGN in the DR15 sample
• Searching for signatures of Fe II atomic processes in spectra of active galactic nuclei
• AGN orientation through the spectroscopic correlations and model of dusty cone shell