Radio Galaxy Redshift-Angular Size Data Constraints on Dark Energy
  We use FRIIb radio galaxy redshift-angular size data to constrain cosmological parameters in a dark energy scalar field model. The derived constraints are consistent with but weaker than those determined using Type Ia supernova redshift-magnitude data. 
Silviu Podariu, Ruth A. Daly, Matthew P. Mory, Bharat Ratra