Insights Into AGN and Host Galaxy Co-evolution From Hard X-ray Emission

Abstract

We study the AGN-host co-evolution issue here by focusing on the correlation between the hard X-ray emission from central AGNs and the stellar populations of the host galaxies. By focusing on the galaxies with strong H$\alpha$ line emission (EW(H$\alpha )>5$Å), both X-ray and optical spectral analysis are performed on 67 (partially) obscured AGNs that are selected from the \it XMM-Newton\rm\ 2XMMi/SDSS-DR7 catalog originally cross-matched by Pineau et al. The sample allows us to study central AGN activity and host galaxy directly and simultaneously in individual objects. Combining the spectral analysis in both bands reveals that the older the stellar population of the host galaxy, the harder the X-ray emission will be, which was missed in our previous study where the \it ROSAT\rm\ hardness ratios are used. By excluding the contamination from the host galaxies and from the jet beaming emission, the correlation indicates that the Compton cooling in the accretion disk corona decreases with the mean age of the stellar population. We argue that the correlation is related to the correlation of $L/L_{\mathrm{Edd}}$ with the host stellar population. In addition, the [\ion{O}{1}]/H$\alpha$ and [\ion{S}{2}]/H$\alpha$ narrow-line ratios are identified to correlate with the spectral slope in hard X-ray, which can be inferred from the currently proposed evolution of the X-ray emission because of the confirmed tight correlations between the two line ratios and stellar population age.

accepted by ApJ, 35 pages, 9 figures and 4 tables

References in corpus (33)

• The Host Galaxies and Classification of Active Galactic Nuclei
• The XMM-Newton Serendipitous Survey. V. The Second XMM-Newton Serendipitous Source Catalogue
• A Close Look at Star Formation around Active Galactic Nuclei
• The X-ray Properties of the Most-Luminous Quasars from the Sloan Digital Sky Survey
• On the X-ray, optical emission line and black hole mass properties of local Seyfert galaxies
• A Comprehensive Study of 2 000 Narrow Line Seyfert 1 Galaxies from the Sloan Digital Sky Survey: I. The Sample
• The Luminosity Function of X-ray Selected Active Galactic Nuclei: Evolution of Supermassive Black Holes at High Redshift
• The Hard X-ray Spectrum as a Probe for Black-Hole Growth in Radio-Quiet Active Galactic Nuclei
• AEGIS: The color-magnitude relation for X-ray selected AGN
• The Hard X-ray Spectral Slope as an Accretion-Rate Indicator in Radio-Quiet Active Galactic Nuclei
• Black Holes in Pseudobulges and Spheroidals: A Change in the Black Hole-Bulge Scaling Relations at Low Mass
• A combined Optical and X-ray Spectra Study for Type 1 AGN. III. Broadband SED Properties
• Non-linear structure formation and the acoustic scale
• Seyfert galaxies in the local Universe (z$\le$ 0.1): the average X-ray spectrum as seen by $BeppoSAX$
• The VVDS type-1 AGN sample: The faint end of the luminosity function
• The Host Galaxies of Narrow-Line Seyfert 1s: Nuclear Dust Morphology and Starburst Rings
• Interactions, star formation and AGN activity
• New Insights on the QSO Radio-Loud/Radio-Quiet Dichotomy: SDSS Spectra in the Context of the 4D Eigenvector1 Parameter Space
• An accretion disc-corona model for X-ray spectra of active galactic nuclei
• Ongoing Formation of Bulges and Black Holes in the Local Universe: New Insights from GALEX
• Observational Constraints on the Dependence of Radio-Quiet Quasar X-ray Emission on Black Hole Mass and Accretion Rate
• Prevalence of High X-ray Obscuring Columns among AGN that Host H${}_2$O Masers
• The Central Engines of 19 LINERs as Viewed by Chandra
• The Host Galaxies and Black Holes of Typical z~0.5-1.4 AGN
• The XMM-Newton bright serendipitous survey. Identification and optical spectral properties
• The Lopsidedness of Present-Day Galaxies: Results from the Sloan Digital Sky Survey
• Nuclear/Circumnuclear Starbursts and Active Galactic Nuclei Mass Accretion in Seyfert Galaxies
• The broad-band XMM-Newton and INTEGRAL spectra of bright type 1 Seyfert galaxies
• A comparison of hard X-ray photon indices and iron \ka emission lines in X-ray luminous narrow- and broad-line Seyfert 1 galaxies
• The starburst-AGN connection: the role of young stellar populations in fueling supermassive black holes
• The polyhedral nature of LINERs: An XMM-Newton view of LINERs in radio galaxies
• The X-ray luminous galaxies optically classified as star forming are mostly narrow line Seyfert 1s
• Evolutionary Implications from SDSSJ085338.27+033246.1: A Spectacular N arrow-Line Seyfert 1 Galaxy with Young Post-starburst

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