A Complete Sample of Soft X-ray Selected AGN: II. Statistical Analysis

Abstract

Direct correlations and a Principal Component Analysis (PCA) are presented for a complete sample of 110 soft X-ray selected AGN of which about half are Narrow-Line Seyfert 1 galaxies (NLS1s). The direct correlation analyses show that narrower FWHM(H-beta) correlates with steeper X-ray spectrum, stronger optical FeII emission, weaker [OIII] emission and stronger short-term X-ray variability. This direct correlation analysis and the PCA confirm the Boroson & Green (1992) Eigenvector 1 relationship for AGN: FeII strength anti-correlates with [OIII] line strength. Eigenvector 1 is well-correlated with the Eddington luminosity ratio L/L_Edd while Eigenvector 2 shows a very good correlation with the mass of the central black hole and the mass accretion rate. The Eddington ratio L/L_Edd correlates with the X-ray spectral index alpha-X and the black home mass anti-correlates with the X-ray variability chi^2/nu. The Eddington ration L/L_Edd may be interpreted as the age of an AGN: AGN with steep X-ray spectra, strong FeII, and weak [OIII] are AGN in an early phase of their evolution. In this hypothesis NLS1s are young AGN.

Accepted for publication in AJ (April 2004), 21 pages, 13 figures

References in corpus (11)

• Black Hole Winds
• A Complete Sample of Soft X-ray Selected AGN: I. The Data
• The scaling of the X-ray variability with black hole mass in AGN
• A Long Look at NGC 3783 with the XMM-Newton Reflection Grating Spectrometers
• The Host Galaxies of Narrow-Line Seyfert 1s: Evidence for Bar-Driven Fueling
• The black hole--bulge relation in AGNs
• Eddington Accretion and QSO Emission Lines at z ~ 2
• Chandra Observations of X-ray Weak Narrow-Line Seyfert 1 Galaxies
• An AGN Sample with High X-ray-to-optical Flux Ratio from RASS II.Optical Emission Line Properties of Seyfert 1 Type AGN
• A Multiwavelength study of NLS1s galaxies from the Second Byurakan Survey
• Black Hole Growth & the M_BH--Bulge Relations

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