We investigate whether a tachyonic scalar field, encompassing
both dark energy and dark matter-like features will drive our
universe towards a Big Brake singularity or a de Sitter
expansion. In doing this it is crucial to establish the
parameter domain of the model, which is compatible with type Ia
supernovae data. We find the 1σ contours and evolve the
tachyonic sytem into the future. We conclude, that both future
evolutions are allowed by observations, Big Brake becoming
increasingly likely with the increase of the positive model
parameter k. © 2010 American Institute of Physics.
