Search Publications

Figure of merit for dark energy constraints from current observational data

Wang, Yun

In order to make useful comparisons of different dark energy experiments, it is important to choose the appropriate figure of merit (FoM) for dark energy constraints. Here we show that for a set of dark energy parameters {f_i}, it is most intuitive to define FoM=1/det⁡Cov(f₁,f₂,f₃,…), where Cov(f₁

Search for cosmic strings in the Great Observatories Origins Deep Survey

Smoot, G. F.; Christiansen, J. L.; Albin, E. +3 more

We search Hubble Space Telescope Treasury Program images collected as part of the Great Observatories Origins Deep Survey for pairs of galaxies consistent with the gravitational lensing signature of a cosmic string. Our technique includes estimates of the efficiency for finding the lensed galaxy pair. In the north (south) survey field we find no e…