Made-to-measure galaxy models - II Elliptical and Lenticular Galaxies - INSPIRE

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Made-to-measure galaxy models - II Elliptical and Lenticular Galaxies

Jan, 2012

14 pages

Published in:

Mon.Not.Roy.Astron.Soc. 421 (2012) 2580

e-Print:

1201.0951 [astro-ph.GA]

DOI:

10.1111/j.1365-2966.2012.20488.x

View in:

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Abstract: (arXiv)

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.

Note:

14 pages, 8 figures and 5 tables

References(22)

Figures(0)

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