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News Release
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Office of News and Information Johns Hopkins University 901 South Bond Street, Suite 540 Baltimore, Maryland 21231 Phone: 443-287-9960 | Fax: 443-287-9920 |
December 9, 2005 FOR IMMEDIATE RELEASE CONTACT: Lisa De Nike (443) 287-9960 lde@jhu.edu |
Startling Detail
Graphics
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Dark matter in the high-redshift cluster CL 0152-1357.
Gravitational lensing analysis with the Advanced Camera for
Surveys (ACS) reveals the complicated dark matter distribution (purple)
in unprecedented detail when the Universe was at half its present age.
The yellowish galaxies are the visible cluster member galaxies
forming a filamentary structure, possibly in the process of merging. (Jee et al. 2005, Astrophysical Journal) |
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| On the left hand side is an ACS image that shows the lensed galaxy elongated vertically by gravity. However, when the same galaxy is observed with the Very Large Telescope (VLT) at Cerro Paranal, we only see a small blob indicating no hints of lensing (right panel). The shape information has been destroyed by the atmospheric turbulence even if it is much weakerthere than at the sea level. |
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| Holland Ford, Myungkook James Jee and Richard White |
Go to
News Release:
JHU-STScI Team Maps Dark Matter in Startling
Detail
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