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.]]> Mon 15 Dec 2014 05:16:43 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.]]> Mon 15 Dec 2014 05:13:58 EST ]]>