Journal Article

Made-to-measure galaxy models – II. Elliptical and lenticular galaxies

R. J. Long and Shude Mao

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 421, issue 3, pages 2580-2592
Published in print April 2012 | ISSN: 0035-8711
Published online April 2012 | e-ISSN: 1365-2966 | DOI:
Made-to-measure galaxy models – II. Elliptical and lenticular galaxies

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We take a sample of 24 elliptical and lenticular galaxies previously analysed by the SAURON project using three integral dynamical models created with Schwarzschild 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 ratios (M/L values) for the galaxies with over 80 per cent of ratios differing by <10 per cent and over 95 per cent differing by <20 per cent. We show that . For the global velocity dispersion anisotropy parameter δ, we find similar values but with fewer of the M2M models tangentially anisotropic by comparison with their SAURON Schwarzschild counterparts. Our investigation is the largest comparative application of the M2M method to date.

Keywords: methods: numerical; galaxies: elliptical and lenticular, cD; galaxies: kinematics and dynamics; galaxies: structure

Journal Article.  6547 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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