SDSSJ0946+1006

SDSSJ0946+1006 is an unusual gravitational lens system consisting of three galaxies at distances of respectively three, six, and eleven billion light years from Earth. In a report presented at the 211th meeting of the American Astronomical Society, researchers Raphael Gavazzi and Tommaso Treu of the University of California, Santa Barbara described the discovery of a double Einstein ring produced by the gravitational lensing of light from two distant galaxies. The observations were made using the Hubble Space Telescope.

The main lens lies at redshift z=0.222 , with the inner ring at z=0.609 with an Einstein radius R_E=1.43±0.01 and magnitude m=19.784±0.006 , the outer ring is at z≲6.9 with R_E=2.07±0.02 and magnitude m=23.68 ± 0.09 [ arXiv preprint: PDF| [http://arxiv.org/pdf/0801.1555v1 The Sloan Lens ACS Survey. VI: Discovery and Analysis of a Double Einstein Ring] |1.08 MB 2-Feb-2008 ] The lensing galaxy is also known as SDSSJ0946+1006 L1, with the nearer lensed galaxy as SDSSJ0946+1006 S1, and the farther lensed galaxy SDSSJ0946+1006 S2.

External links

*http://presscue.com/node/38728
*HubbleSite [http://hubblesite.org/newscenter/archive/releases/2008/04/full/ Hubble Finds Double Einstein Ring] January 10, 2008 10:00 AM (EST)

References