We present a study of the central parts of the Sagittarius dwarf spheroidal galaxy (Sgr). We found a clear overdensity of Sgr's stars around M~54 (hereafter NS). NS is well represented by a King model and it has the characteristics of a typical dwarf elliptical nucleus. Whether this means that M~54 has spiraled into the potential well of NS or that M~54 is the real nucleus and NS has formed into its potential wells, remains an open question to be addressed.
@article{arxiv.astro-ph/0309044,
title = {The Nuclear Structure of the Sagittarius Dwarf Spheroidal Galaxy},
author = {Lorenzo Monaco and Michele Bellazzini and Francesco R. Ferraro and Elena Pancino},
journal= {arXiv preprint arXiv:astro-ph/0309044},
year = {2007}
}
Comments
4 pages, 2 figures. To be published in ``Satellites and Tidal Streams'', proceedings of the conference held in La Palma 26-30 May 2003, Spain, eds, F. Prada,D. Martinez-Delgado, T. Mahoney