Optimal smoothing length of galaxy models based on the Sérsic law

Details Optimal smoothing length of galaxy models based on the Sérsic law Optimal smoothing length of galaxy models based on the Sérsic law

Jan 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007waas.work..101c&link_type=abstract

"1st Workshop of Astronomy and Astrophysics for Students" held in Naples (ITALY) on April 19-20, 2006. Published by INFN-Naples,

Astronomy and Astrophysics

Astrophysics

Scientific paper

We aim to use N-body simulations in order to investigate how dissipation-less merging affects internal color gradients and structural properties of early-type galaxies. Galaxies are modeled as spherical, two-components, non-rotating systems. The dark matter component has a density profile described by a deprojected Sérsic law with shape parameter n=3, while the luminous component is described by deprojecting Sérsic profiles with different shape parameters. Following a similar approach to that of Merritt te{1996AJ....111.2462M}, we discuss how one can define the optimal softening length of discrete N-body realizations of systems following the two-dimensional Sérsic density profile. The optimal softening length turns out to decrease as a function of both the Sérsic index and the number of particles of the simulation.

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