other query modes : |
Identifier query |
Coordinate query |
Criteria query |
Reference query |
Basic query |
Script submission |
TAP |
Output options |
Object types |
Help |
2012MNRAS.422.3268J - Mon. Not. R. Astron. Soc., 422, 3268-3284 (2012/June-1)
A combined optical and X-ray study of unobscured type 1 active galactic nuclei - II. Relation between X-ray emission and optical spectra.
JIN C., WARD M. and DONE C.
Abstract (from CDS):
A cross-correlation with luminosity between the various Balmer line components and the broad-band spectral energy distribution (SED) components shows that the best correlation exists between the hard X-ray component and the broad component (BC) of the Balmer lines. Such a correlation is weaker for the intermediate (IC) and narrow components, which supports the view that the broad-line region (BLR) has the closest link with the AGN's compact X-ray emission. The equivalent widths of the Balmer line IC and BC are found to correlate with {img}, {img}, Balmer line full width at half-maximum (FWHM) and black hole mass. There is a non-linear dependence of the Balmer line IC and BC luminosities with {img} and L5100, which suggests that a second-order factor such as the intermediate-line region (ILR) and BLR covering factors affect the Balmer line component luminosities. The Balmer decrement is found to decrease from ∼5 in the line core to ∼2 in the extended wings, with mean decrements of 2.1 in the BLR and 4.8 in the ILR. This suggests different physical conditions in these regions, such as variations in electron density and dust abundance.
The [O III] line is composed of a narrow core together with a blueshifted component with an average outflow velocity of {img}. The total luminosity of [O III] λ5007 shows the best correlation with the luminosity of hard X-ray emission, and so can be used to estimate the intrinsic X-ray luminosity of obscured AGNs. We use the CST to show the correlation of the [O III] λ5007 luminosity with each wavelength of the full continuum SED. This shows as before that not only does the [O III] λ5007 luminosity strongly correlate with a power-law tail, but it also correlates almost as strongly with the optical continuum from the disc, but not with the soft excess.
Abstract Copyright: 2012 The Authors Monthly Notices of the Royal Astronomical Society2012 RAS
Journal keyword(s): accretion, accretion discs - galaxies: active - galaxies: nuclei
VizieR on-line data: <Available at CDS (J/MNRAS/422/3268): tableb1.dat>
Simbad objects: 11
To bookmark this query, right click on this link: simbad:2012MNRAS.422.3268J and select 'bookmark this link' or equivalent in the popup menu