High-redshift standard candles: Predicted cosmological constraints

Abstract

We investigate whether future measurements of high-redshift standard candles will be a powerful probe of dark energy, when compared to other types of planned dark energy measurements. Active galactic nuclei, gamma-ray bursts, and certain types of core collapse supernova have been proposed as potential candidates of such a standard candle. Due to their high luminosity, they can be used to probe unexplored regions in the expansion history of the Universe. Information from these regions can help constrain the properties of dark energy, and in particular, whether it varies over time. We consider both linear and piecewise parameterizations of the dark energy equation of state, w(z), and assess th..