Forecast of Cosmological Constraints with Type Ia Supernovae from the Chinese Space Station Telescope

Abstract

The 2-m aperture Chinese Space Station Telescope (CSST), which observes at wavelengths ranging from 255 to 1000 nm, is expected to start science operations in 2024. An ultra-deep field observation program covering approximately 10 square degrees is proposed with supernovae (SNe) and other transients as one of its primary science drivers. This paper presents the simulated detection results of type Ia supernovae (SNe Ia) and explores the impact of new datasets on the determinations of cosmological parameters. The simulated observations are conducted with an exposure time of 150 s and cadences of 10, 20, and 30 days. The survey mode covering a total of 80 observations but with a random cadence in the range of 4 to 14 days is also explored. Our simulation results indicate that the CSST can detect up to $\sim 1800$ SNe Ia at z $<$ 1.3. The simulated SNe Ia are then used to constrain the cosmological parameters. The constraint on ${\Omega }_m$ can be improved by 37.5% using the 10-day cadence sample in comparison with the Pantheon sample. A deeper measurement simulation with a 300 s exposure time together with the Pantheon sample improves the current constraints on ${\Omega }_m$ by 58.3% and $\omega$ by 47.7%. Taking future ground-based SNe Ia surveys into consideration, the constraints on $\omega$ can be improved by 59.1%. The CSST ultra-deep field observation program is expected to discover large amounts of SNe Ia over a broad redshift span and enhance our understanding of the nature of dark energy.

10 pages, 6 figures, 2 tables, accepted for publication in SCIENCE CHINA Physics, Mechanics & Astronomy

References in corpus (8)

• Supernova Constraints and Systematic Uncertainties from the First 3 Years of the Supernova Legacy Survey
• Improved Distances to Type Ia Supernovae with Multicolor Light Curve Shapes: MLCS2k2
• Correcting Type Ia Supernova Distances for Selection Biases and Contamination in Photometrically Identified Samples
• SALT3: An Improved Type Ia Supernova Model for Measuring Cosmic Distances
• Forecast for cosmological parameter estimation with gravitational-wave standard sirens from the LISA-Taiji network
• The completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Cosmological implications from multi-tracer BAO analysis with galaxies and voids
• The Zwicky Transient Facility Type Ia supernova survey: first data release and results
• Multiple measurements of quasars acting as standard probes: model independent calibration and exploring the Dark Energy Equation of States

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• Improving Constraint on ${\Omega }_m$ from SDSS Using Marked Correlation Functions
• Testing Gauss-Bonnet Gravity with DESI BAO Data
• Prospects of the multi-channel photometric survey telescope in the cosmological application of Type Ia supernovae
• A new magnitude--redshift relation based on Type Ia supernovae