dSph-like MW Satellites from Massive Dark Matter Free Progenitors

Details dSph-like MW Satellites from Massive Dark Matter Free Progenitors dSph-like MW Satellites from Massive Dark Matter Free Progenitors

May 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009rmxac..35r.296p&link_type=abstract

XII Latin American IAU Regional Meeting (Eds. G. Magris, G. Bruzual, & L. Carigi) Revista Mexicana de Astronomía y Astrofísica (

Astronomy and Astrophysics

Astronomy

Scientific paper

We study the evolution of initially spherical satellites of a galaxy that resembles the Milky Way using N-Body simulations. The initial satellites come from a Plummer sphere model with 10^6 particles, they are dark matter free and have typical masses of 10^7 - 10^9~M_&sun;. The satellite is bounded by a galactic potential: A Miyamoto-Nagai potential for the disc, a Hernquist potential for the bulge and a logaritmic potential for the dark matter halo. The initial satellite is introduced into the potential with certain apogalactic distance and velocity. We present a map of initial conditions for the orbit that lead to disrupted satellites, using only those that remain bound with 1% of the initial mass for a long enough period, which could be interpreted as dSph's by an observer on earth.

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