Science China Physics Mechanics and Astronomy· 2026Q1
MUltiplexed Survey Telescope (MUST) science white paper I: Overview of large-scale structure cosmology in the era of Stage-V spectroscopic surveys
- 5citations
- Q1SCImago
- 2026year
Short summary
The MUltiplexed Survey Telescope (MUST), a 6.5-meter telescope, will conduct the first Stage-V spectroscopic survey by observing over 20,000 targets simultaneously to map 100 million galaxies and quasars up to redshift z ~ 5.5.
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Key points
- MUST is a 6.5-meter telescope capable of simultaneous observation of over 20,000 targets.
- It aims to perform the first Stage-V spectroscopic survey, mapping >100 million galaxies and quasars up to z ~ 5.5.
- An initial target selection algorithm is presented for local bright galaxies, luminous red galaxies, emission-line galaxies, and high-redshift Lyman-break galaxies.
- Fisher forecasts indicate MUST's potential to address key questions in dark energy, gravity, and primordial physics.
AI-generated from the title and abstract; the full text is not read.
Abstract
The MUltiplexed Survey Telescope (MUST) is a 6.5-meter telescope under development. Dedicated to highly-multiplexed, wide-field spectroscopic surveys, MUST observes over 20,000 targets simultaneously using 6.2-mm pitch positioning robots within a ~5 deg$^2$ field of view. MUST aims to conduct the first Stage-V spectroscopic survey in the 2030s, mapping the 3D Universe with over 100 million galaxies and quasars, spanning from the nearby Universe to a redshift of z ~ 5.5, corresponding to approximately 1 billion years after the Big Bang. To cover this extensive redshift range, we present an initial conceptual target selection algorithm for different types of galaxies, ranging from local bright galaxies and luminous red galaxies to emission-line galaxies, and high-redshift (2 < z < 5.5) Lyman-break galaxies. Using Fisher forecasts, we demonstrate that MUST can address fundamental questions in cosmology, including the nature of dark energy, tests of gravity theories, and investigations into primordial physics. This is the first paper in the series of science white papers for MUST, with subsequent developments focusing on additional scientific cases such as galaxy and quasar evolution, Milky Way physics, and dynamic phenomena in the time-domain Universe.
The authors' abstract, as published at the source. Science China Physics Mechanics and Astronomy, 2026 · DOI ↗
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Field: Astronomy and Astrophysics
Astronomy and AstrophysicsPhysics and Astronomy