Made-to-measure galaxy models - II Elliptical and Lenticular Galaxies
Abstract
We take a sample of 24 elliptical and lenticular galaxies previously analysed by the SAURON project using three-integral dynamical models created with Schwarzschild's method, and re-analyse them using the made-to-measure (M2M) method of dynamical modelling. We obtain good agreement between the two methods in determining the dynamical mass-to-light (M/L) ratios for the galaxies with over 80% of ratios differing by < 10% and over 95% differing by < 20%. We show that (M/L)_M2M is approximately equal to (M/L)_Sch. For the global velocity dispersion anisotropy parameter delta, we find similar values but with fewer of the made-to-measure models tangentially anisotropic by comparison with their SAURON Schwarzschild counterparts. Our investigation is the largest comparative application of the made-to-measure method to date.
Keywords
Cite
@article{arxiv.1201.0951,
title = {Made-to-measure galaxy models - II Elliptical and Lenticular Galaxies},
author = {R. J. Long and Shude Mao},
journal= {arXiv preprint arXiv:1201.0951},
year = {2015}
}
Comments
14 pages, 8 figures and 5 tables