[astro-ph/0507184] Is Cosmic Acceleration a Symptom of the B
Posted: July 14 2005
This paper looks at the power of future Lensing+CMB+SNIa observations in distinguishing between DGP braneworld cosmologies and a quintessence cosmology with smoothly varying equation of state.
The draft is a summary of brute force Fisher matrix analyses, which show that w(z) reconstructed from (SNIa+CMB) and (Lensing+CMB) can be siginificantly discrepant, if we have an underlying DGP braneworld cosmology.
The problem is that, even if such discrepancy is observed, it could also be interpreted as a sign of more bells and whistles in the dark energy model (less smooth w(z), variable speed of sound, etc.).
Here is my prejudice: The sheer abundance of dark energy models makes ruling them out next to impossible, which is probably similar to the case for inflation.
The draft is a summary of brute force Fisher matrix analyses, which show that w(z) reconstructed from (SNIa+CMB) and (Lensing+CMB) can be siginificantly discrepant, if we have an underlying DGP braneworld cosmology.
The problem is that, even if such discrepancy is observed, it could also be interpreted as a sign of more bells and whistles in the dark energy model (less smooth w(z), variable speed of sound, etc.).
Here is my prejudice: The sheer abundance of dark energy models makes ruling them out next to impossible, which is probably similar to the case for inflation.