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Date and Time of the Query: 2019-08-18 T13:10:26 PDT
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For refcode 2012ApJ...755..163D:
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Copyright by American Astronomical Society. Reproduced by permission
2012ApJ...755..163D Sizing up Partially Depleted Galaxy Cores Dullo, Bililign T.; Graham, Alister W. Abstract. We have modeled the inner surface brightness profiles of 39 alleged "core" galaxies with the core-Sersic model, and provide new physical parameters for the largest ever sample of "core" galaxies fit with this model. When present, additional nuclear components were simultaneously modeled and the typical root-mean-square scatter of the fits (out to ~10") is 0.02 mag arcsec^-2^. Model-independent estimates of each core's break radius are shown to agree with those from the core-Sersic model, and a comparison with the Nuker model is provided. We found an absence of cores in what amounts to 18% of the sample, which are reclassified here as Sersic galaxies with low values of n (lsim 4) and thus shallow inner profile slopes. In general, galaxies with n < 3 and sigma < 183 km s^-1^ do not have depleted cores. We derive updated relations between core-Sersic break radii, their associated surface brightness, bulge luminosity, central velocity dispersion, and predicted black hole mass for galaxies with depleted cores. With the possible exception of NGC 584, we confirm that the inner negative logarithmic profile slopes gamma are lsim0.3 for the "core" galaxies, and 0 > gamma > -0.1 for six of these. Finally, the central stellar mass deficits are found to have values typically within a factor of four of the expected central black hole mass. Key words: galaxies: elliptical and lenticular, cD, galaxies: fundamental parameters, galaxies: nuclei, galaxies: photometry, galaxies: structure
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