The dark matter halo of the gravitational lens galaxy 0047-2808

Details The dark matter halo of the gravitational lens galaxy 0047-2808 The dark matter halo of the gravitational lens galaxy 0047-2808

2002-09-16

arxiv.org/abs/astro-ph/0209291v1

Astronomy and Astrophysics

Astrophysics

4 pages, 2 figures. Conference proceedings of IAU 8th Asian-Pacific regional meeting in Tokyo

Scientific paper

The location of the images in a multiple-image gravitational lens system are strongly dependent on the orientation angle of the mass distribution. As such, we can use the location of the images and the photometric properties of the visible matter to constrain the properties of the dark halo. We apply this to the optical Einstein Ring system 0047-2808 and find that the dark halo is almost spherical and is aligned in the same direction as the stars to within a few degrees.

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