Streaming motion in Leo I
Applications
2009-05-18 v1
Abstract
Whether a dwarf spheroidal galaxy is in equilibrium or being tidally disrupted by the Milky Way is an important question for the study of its dark matter content and distribution. This question is investigated using 328 recent observations from the dwarf spheroidal Leo I. For Leo I, tidal disruption is detected, at least for stars sufficiently far from the center, but the effect appears to be quite modest. Statistical tools include isotonic and split point estimators, asymptotic theory, and resampling methods.
Cite
@article{arxiv.0905.2544,
title = {Streaming motion in Leo I},
author = {Bodhisattva Sen and Moulinath Banerjee and Michael Woodroofe and Mario Mateo and Matthew Walker},
journal= {arXiv preprint arXiv:0905.2544},
year = {2009}
}
Comments
Published in at http://dx.doi.org/10.1214/08-AOAS211 the Annals of Applied Statistics (http://www.imstat.org/aoas/) by the Institute of Mathematical Statistics (http://www.imstat.org)