http://researchbank.swinburne.edu.au/vital/access/manager/Index ${session.getAttribute("locale")} 5 Galaxy structure: core radii, and central mass deficits http://researchbank.swinburne.edu.au/vital/access/manager/Repository/swin:10167 -20.5 B-mag) elliptical galaxies. We also find that 'core galaxies' have Sérsic profiles with a (partially evacuated) single power-law core. We have developed a modified (5-parameter) Sérsic profile with a power-law core to model the complete radial extent of luminous galaxies with cores. In addition to quantifying the global stellar distribution in these systems, we have derived new estimates of their core radii and other central properties. Comparison of the central stellar deficits with the galaxies' black hole masses suggests that the number of (dissipationless) major mergers that have produced luminous elliptical galaxies is around 1-2, rather than 8-10, which agrees with theory and implies that the galactic merger history of the Universe is roughly an order of magnitude less violent than previous observational analyses had suggested.]]> Fri 08 Apr 2011 20:13:33 EST ]]> Galaxy structure: core radii and central mass deficits http://researchbank.swinburne.edu.au/vital/access/manager/Repository/swin:10168 -20.5 B-mag) elliptical galaxies. We also find that 'core galaxies' have Sersic profiles with a (partially evacuated) single power-law core. We have developed a modified (5-parameter) Sersic profile with a power-law core to model the complete radial extent of luminous galaxies with cores. In addition to quantifying the global stellar distribution in these systems, we have derived new estimates of their core radii (and central mass deficits) and compare these with values obtained using the (5-parameter) Nuker model.]]> Fri 08 Apr 2011 20:13:29 EST ]]>