The end of unified dark matter

By H. Sandvik, Max Tegmark, M. Zaldarriaga, I. Waga. 2002

344 citations recorded by the source corpus.

Despite the interest in dark matter and dark energy, it has never been shown that they are in fact two separate substances. We provide the first strong evidence that they are separate by ruling out a broad class of so-called unified dark matter models that have attracted much recent interest. We find that they produce oscillations or exponential blowup of the dark matter power spectrum inconsistent with observation. For the particular case of generalized Chaplygin gas models, 99.999% of the previously allowed parameter space is excluded, leaving essentially only the standard $\ensuremath{\Lambda}\mathrm{CDM}$ limit allowed.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/0de431d4ba59acd21d350fa8bdf21c56ac68069f

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Astronomy and Astrophysics

In Nuclear and High Energy Physics

Citations in the corpus

Haloes of k-essence (2005, background): “On the other hand, their cosmological sound speed is also dark matter-like, and it turns out that unified models based on these Chaplygin gases successfully reproduce the linear structures we observe in the universe [17].”
The Chaplygin gas as a model for dark energy (2004, neutral): “ar X iv :g rqc /0 40 30 62”