Quantifying the impact of future Sandage-Loeb test data on dark energy constraints

Abstract

The Sandage-Loeb (SL) test is a unique method to probe dark energy in the "redshift desert" of $2\lesssim z\lesssim 5$, and thus it provides an important supplement to the other dark energy probes. Therefore, it is of great importance to quantify how the future SL test data impact on the dark energy constraints. To avoid the potential inconsistency in data, we use the best-fitting model based on the other geometric measurements as the fiducial model to produce 30 mock SL test data. The 10-yr, 20-yr, and 30-yr observations of SL test are analyzed and compared in detail. We show that compared to the current combined data of type Ia supernovae, baryon acoustic oscillation, cosmic microwave background, and Hubble constant, the 30-yr observation of SL test could improve the constraint on ${\Omega }_m$ by about $80$ and the constraint on $w$ by about $25$. Furthermore, the SL test can also improve the measurement of the possible direct interaction between dark energy and dark matter. We show that the SL test 30-yr data could improve the constraint on $\gamma$ by about $30$ and $10$ for the $Q=\gamma H{\rho }_c$ and $Q=\gamma H{\rho }_{de}$ models, respectively.

10 pages, 3 figures

References in corpus (6)

• Supernova Constraints and Systematic Uncertainties from the First 3 Years of the Supernova Legacy Survey
• Cosmic dynamics in the era of Extremely Large Telescopes
• Exploring the Dark Energy Redshift Desert with the Sandage-Loeb Test
• The time evolution of cosmological redshift as a test of dark energy
• Exploring holographic dark energy model with Sandage-Loeb test
• Tilt of primordial gravitational wave spectrum in a universe with sterile neutrinos

Cited by in corpus (4)

• Another look at redshift drift and the backreaction conjecture
• Effects of time-varying $\beta$ in SNLS3 on constraining interacting dark energy models
• Parameter estimation with Sandage-Loeb test
• Redshift drift constraints on holographic dark energy