Probing Dark Energy with the Kunlun Dark Universe Survey Telescope

TL;DR

This paper proposes a deep, high-resolution imaging survey at Dome A, Antarctica, using KDUST and LSST to constrain dark energy parameters through multiple cosmological techniques, leveraging unique observational advantages.

Contribution

It introduces a coordinated survey strategy combining KDUST and LSST data to improve dark energy and dark matter constraints with high-resolution imaging from Dome A.

Findings

A 10,000 deg² survey can provide competitive dark energy constraints.

High-resolution imaging enhances dark matter property measurements.

Joint survey improves parameter constraints beyond individual efforts.

Abstract

Dark energy is an important science driver of many upcoming large-scale surveys. With small, stable seeing and low thermal infrared background, Dome A, Antarctica, offers a unique opportunity for shedding light on fundamental questions about the universe. We show that a deep, high-resolution imaging survey of 10,000 square degrees in \emph{ugrizyJH} bands can provide competitive constraints on dark energy equation of state parameters using type Ia supernovae, baryon acoustic oscillations, and weak lensing techniques. Such a survey may be partially achieved with a coordinated effort of the Kunlun Dark Universe Survey Telescope (KDUST) in \emph{yJH} bands over 5000--10,000 deg$^2$ and the Large Synoptic Survey Telescope in \emph{ugrizy} bands over the same area. Moreover, the joint survey can take advantage of the high-resolution imaging at Dome A to further tighten the constraints on dark energy and to measure dark matter properties with strong lensing as well as galaxy--galaxy weak lensing.