To set useful limits on the abundance of small-scale dark matter halos (subhalos) in a galaxy scale, we have carried out mid-infrared imaging and integral-field spectroscopy for a sample of quadruple lens systems showing anomalous flux ratios. These observations using Subaru have been successful for distinguishing millilensing by subhalos from microlensing by stars. Current status for our lensing analysis of dark matter substructure is reported.
@article{arxiv.0804.0282,
title = {Dark Matter Substructure in Lensing Galaxies},
author = {Masashi Chiba and Takeo Minezaki and Kaiki T. Inoue and Nobunari Kashikawa and Hirokazu Kataza and Hajime Sugai},
journal= {arXiv preprint arXiv:0804.0282},
year = {2008}
}
Comments
4 pages, 3 figures, to appear in the proceedings of "Panoramic Views of Galaxy Formation and Evolution", 1st Subaru International Conference held in Hayama, Japan 11-16 December 2007