Gas Disks and Supermassive Black Holes in Nearby Radio Galaxies

might expect, the X-ray flux originates from the same physical processes in (or close
to) the central engine or jet bases as the other nuclear fluxes. We explain the tighter
correlation between X-ray and radio fluxes in that these two parameters are the least
likely to be contaminated by stellar light.
In Figure 5.13 we show the Spectral Energy Distributions (SEDS) for the 5 sample
galaxies where we have data at each wavelength, which do show fairly similar shapes
as implied by the above correlations. In Figure 5.14 we show data for the nucleus of
M87 (from Perlman et al., 2001) along with a set of emission mechanisms illustrative of
the type that may be present in the central engine (di Matteo et al., 2000) and would
produce correlations between the nuclear fluxes (e.g. various synchrotron models from
jets, and Advection Dominated Accretion Flows with dominant outflows or dominant
disks). Our data represent the outline shape of these models well, and more detailed
analysis and modeling may yield information about the relative contributions of jets
and disks in the nuclear light.
5.3.3 Correlations between host galaxy and central engine
In Table 5.3 we show the cross-correlation coefficients between Broad and Narrow
line widths and the X-ray and VLBA luminosities in the nucleus. The correlations
between the X-ray and Radio fluxes and σBL suggest that the Broad Line width may
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