Astrophysical Probes of Fundamental Physics

Details Astrophysical Probes of Fundamental Physics Astrophysical Probes of Fundamental Physics

2006-10-22

arxiv.org/abs/astro-ph/0610665v1

Astronomy and Astrophysics

Astrophysics

Invited Review talk at the ESO Precision Spectroscopy in Astrophysics conference, to appear in the proceedings

Scientific paper

I review the theoretical motivation for varying fundamental couplings and discuss how these measurements can be used to constrain a number of fundamental physics scenarios that would otherwise be inacessible to experiment. As a case study I will focus on the relation between varying couplings and dark energy, and explain how varying coupling measurements can be used to probe the nature of dark energy, with important advantages over the standard methods. Assuming that the current observational evidence for varying $\alpha$ and $\mu$ is correct, a several-sigma detection of dynamical dark energy is feasible within a few years, using currently operational ground-based facilities. With forthcoming instruments like CODEX, a high-accuracy reconstruction of the equation of state may be possible all the way up to redshift $z\sim4$.

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