The Shapes of Elliptical Galaxies with Massive Dark Objects and Central Density Cusps

Details The Shapes of Elliptical Galaxies with Massive Dark Objects and Central Density Cusps The Shapes of Elliptical Galaxies with Massive Dark Objects and Central Density Cusps

Aug 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aspc..182..142r&link_type=abstract

Galaxy Dynamics, proceedings of a conference held at Rutgers University, 8-12 Aug 1998. ASP Conference Series vol. 182 (San Fran

Physics

4

Scientific paper

For a sample of 22 core ellipticals and 22 power law ellipticals, I examine the apparent axis ratios of isophotes as a function of dynamical time. The core galaxies are significantly rounder than the power law galaxies in the region where the dynamical time is short (~ 1 Myr). In the outer regions (tdyn > 10 {Myr}), the two types have indistinguishable shape distributions. The inner isophotes of core galaxies are consistent with their being randomly oriented oblate objects, with a peak intrinsic axis ratio of γ = 0.86. The outer regions of core galaxies are inconsistent with their being randomly oriented oblate or prolate objects.

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