Sizing up Partially-Depleted Galaxy Cores

Abstract

We have modelled 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 modelled and the typical rms scatter of the fits (out to ~10 arcsec) 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 (< ~ 4) and thus shallow inner profile slopes. In general, galaxies with n<3 and sigma < 183 km/s 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 < ~ 0.3 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 4 of the expected central black hole mass.

24 pages, 23 figures, accepted for publication in ApJ

References in corpus (10)

• The ACS Virgo Cluster Survey. VIII. The Nuclei of Early-Type Galaxies
• The influence of gas on the structure of merger remnants
• Dissipation and Extra Light in Galactic Nuclei: II. 'Cusp' Ellipticals
• The ACS Fornax Cluster Survey. II. The Central Brightness Profiles of Early-Type Galaxies: A Characteristic Radius on Nuclear Scales and the Transition from Central Luminosity Deficit to Excess
• The Host Galaxies of Narrow-Line Seyfert 1s: Nuclear Dust Morphology and Starburst Rings
• Are disk galaxies the progenitors of giant ellipticals?
• The Black Hole Mass and Extreme Orbital Structure in NGC1399
• The Hot Interstellar Medium in Normal Elliptical Galaxies. II. Morphological Evidence for AGN Feedback
• The ACS Fornax Cluster Survey. IV. Deprojection of the Surface Brightness Profiles of Early-Type Galaxies in the Virgo and Fornax Clusters: Investigating the "Core/Power-Law Dichotomy"
• Central K-band kinematics and line strength maps of NGC 1399

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