Through a Lens, Darkly - New Constraints on the Fundamental Components of the Cosmos - X

Details Through a Lens, Darkly - New Constraints on the Fundamental Components of the Cosmos - X Through a Lens, Darkly - New Constraints on the Fundamental Components of the Cosmos - X

Jul 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009hst..prop12104p&link_type=abstract

HST Proposal ID #12104. Cycle 18

Physics

Scientific paper

As the most massive objects in the universe, galaxy clusters represent important signposts in our story of structure evolution, and are the ultimate telescopic lenses, placing gravitationally lensed galaxies from the earliest epochs in comfortable reach for careful study. We take full advantage of the refurbished ACS and WFC3 cameras to deliver deep 14-filter images of 25 carefully chosen clusters. These will enable us to address timely and substantive questions about dark matter, dark energy, and galaxy evolution well beyond z=7. These X-ray clusters are chosen to be free of lensing bias and to span a wide range of redshift and mass. By combining strong and weak lensing, we will obtain the definitive mass profile of relaxed clusters to confront the distinctive prediction of the standard LambdaCDM model. Detailed maps of internal structure will be enabled by 1,000 new multiply-imaged lensed sources to AB=26, all with precise {2% x {1+z}} photometric redshift measurements, thanks to WFC3's UV and IR coverage. A supernovae search in parallel {with low magnification uncertainties} will extend the Hubble diagram of SN1a to z>1.5, testing the constancy of dark energy with time and probing progenitor evolution. Our homogeneous panchromatic deep imaging of this cluster sample will constitute a vast legacy archive for studies of the formation and evolution of structure.;

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