An interesting and well presented new paper by Kumar and Xu:(adsbygoogle = window.adsbygoogle || []).push({});

"Observational constraints on a cosmological model with variable equation of state parameters for matter and dark energy" http://arxiv.org/abs/1207.5582

The idea of a variable equation of state for matter and dark energy is not revolutionary - e.g, "Cosmological model with variable equations of state for matter and dark energy" http://arxiv.org/abs/1204.0589 by Ponce de Leon. I find the continuity and consistency with observational evidence in modeling effects from high z to the modern era appealing.

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Cosmological models with variable EoS

Can you offer guidance or do you also need help?

Draft saved
Draft deleted

**Physics Forums | Science Articles, Homework Help, Discussion**