Chandra Observations of Two Unusual Lensing Groups of Galaxies

Details Chandra Observations of Two Unusual Lensing Groups of Galaxies Chandra Observations of Two Unusual Lensing Groups of Galaxies

Sep 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009cxo..prop.2914i&link_type=abstract

Chandra proposal ID #11800671

Physics

Scientific paper

We propose Chandra observations of two unusual strong gravitational lenses found by the CASSOWARY gravitational lens survey. Both lenses appear to be high mass concentration groups/galaxies with extreme properties. The Cheshire Cat Lens is caused by what could be to be merging fossil groups at a redshift of 0.43. The implied projected mass within the 62 kpc Einstein Ring encloses a staggering 5e13 solar masses. The Cosmic Horseshoe Lens has a nearly perfectly circular Einstein Ring centered on a z=0.44 giant elliptical galaxy which could conceivably be one of the most massive galaxies in the Universe. Our observations will determine the temperature, density, and masses of these systems to reveal the nature of the objects responsible for these most unusual strong lenses.

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