No Evidence for Dark Energy Dynamics from a Global Analysis of Cosmological Data (2009)
Serra, Paolo, Cooray, Asantha, Holz, Daniel E., Melchiorri, Alessandro, Pandolfi, Stefania, Sarkar, Devdeep
We use a variant of principal component analysis to investigate the possible temporal evolution of the dark energy equation of state, w(z). We constrain w(z) in multiple redshift bins, utilizing the...
When Did Cosmic Acceleration Start ? (2007)
Melchiorri, Alessandro, Pagano, Luca, Pandolfi, Stefania
A precise determination, and comparison, of the epoch of the onset of cosmic acceleration, at redshift z_acc, and of dark energy domination, at z_eq, provides an interesting measure with which to...