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Dark goo: Bulk viscosity as an alternative to dark energy
dark energy theory cosmological perturbation theory
2011/9/29
We present a simple (microscopic) model in which bulk viscosity plays a role in explaining the present acceleration of the universe. The effect of bulk viscosity on the Friedmann equations is to turn ...
Probing bulk viscous matter-dominated models with Gamma-ray bursts
Probing viscous matter-dominated Gamma-ray bursts
2011/9/27
In this paper we extend the range of consistency of a constant bulk viscosity model to redshifts up to $z\sim 8.1$. In this model the dark sector of the cosmic substratum is a viscous fluid with press...
Measuring the Galaxy Cluster Bulk Flow from WMAP data
Cosmology cosmic microwave background observations diffuse radiation
2010/11/15
We have looked for bulk motions of galaxy clusters in the WMAP 7 year data. We isolate the
kinetic Sunyaev-Zeldovich (SZ) signal by filtering the WMAP Q, V and W band maps with multifrequency matched...