Limiting Magnitudes of the Wide Field Survey Telescope (WFST)

Lei, Lei; Zhu, Qing–Ling; Kong, Xu; Wang, Tinggui; Zheng, Xianzhong; Dong-dong, SHI; Fan, Lulu; Liu, Wei

doi:10.1088/1674-4527/acb877

Cited by 15 publications

(6 citation statements)

References 28 publications

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“…Several ongoing surveys regarding cosmic shear, such as Dark Energy Survey (DES) [6,7], Kilo-Degree Survey (KiDS) [8,9], Subaru Hyper Suprime-Cam (HSC) [10,11], have robustly constrained S 8 . There are also future experiments scheduled to operate in the near future, such as Vera C. Rubin Observatory [12], Euclid [13], the Nancy Grace Roman Space Telescope [14], the Wide Filed Survey Telescope (WFST) [15,16], and China Space Station Telescope (CSST) [17][18][19]. These surveys will further improve the sensitivity to the MTH signals.…”

Section: Introductionmentioning

confidence: 99%

Exploring mirror twin Higgs cosmology with present and future weak lensing surveys

Zhang

Chen

et al. 2023

J. Cosmol. Astropart. Phys.

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We explore the potential of precision cosmological data to study non-minimal dark sectors by updating the cosmological constraint on the mirror twin Higgs model (MTH). The MTH model addresses the Higgs little hierarchy problem by introducing dark sector particles. In this work, we perform a Bayesian global analysis that includes the latest cosmic shear measurement from the DES three-year survey and the Planck CMB and BAO data. In the early Universe, the mirror baryon and mirror radiation behave as dark matter and dark radiation, and their presence modifies the Universe's expansion history. Additionally, the scattering between mirror baryon and photon generates the dark acoustic oscillation process, suppressing the matter power spectrum from the cosmic shear measurement. We demonstrate how current data constrain these corrections to the ΛCDM cosmology and find that for a viable solution to the little hierarchy problem, the proportion of MTH dark matter cannot exceed about 30% of the total dark matter density, unless the temperature of twin photon is less than 30% of that of the standard model photon. While the MTH model is presently not a superior solution to the observed H 0 tension compared to the ΛCDM+ΔN eff model, we demonstrate that it has the potential to alleviate both the H 0 and S 8 tensions, especially if the S 8 tension persists in the future and approaches the result reported by the Planck SZ (2013) analysis. In this case, the MTH model can relax the tensions while satisfying the DES power spectrum constraint up to k ≲ 10 hMpc-1. If the MTH model is indeed accountable for the S 8 and H 0 tensions, we show that the future China Space Station Telescope (CSST) can determine the twin baryon abundance with a 10% level precision.

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Section: Introductionmentioning

confidence: 99%

Exploring mirror twin Higgs cosmology with present and future weak lensing surveys

Zhang

Chen

et al. 2023

J. Cosmol. Astropart. Phys.

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“…In this paper, we compute z phot in two typical WFST observational cases, i.e., the single 30 s exposure observations (hereafter shallow mode) and co-added 50 minutes exposure observations (hereafter deep mode). The deep mode can be realized by integrating all the observational time in each band mainly with the WFS program, thus achieving deeper detection limits than any existing single-telescope surveys with comparable survey areas in the northern hemisphere (Lei et al 2023;Wang et al 2023).…”

Section: Overview Of the Wfst Photometry Systemmentioning

confidence: 99%

“…86, 25.95, 25.48, 24.96, 24.03] in the deep mode, respectively (Wang et al 2023). The modeling results of the 5σ limiting magnitudes and sky backgrounds in different lunar phases are listed in Table 1 (Lei et al 2023).…”

Section: Overview Of the Wfst Photometry Systemmentioning

confidence: 99%

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Preliminary Study of Photometric Redshifts Based on the Wide Field Survey Telescope

Liu,

Lin,

Xue

et al. 2023

Res. Astron. Astrophys.

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The Wide Field Survey Telescope (WFST) is a dedicated time-domain multi-band (u, g, r, i, and z) photometric survey facility under construction. In this paper, we present a preliminary study that assesses the quality of photometric redshifts based on WFST by utilizing mock observations derived with the galaxy catalog in the COSMOS/UltraVISTA field. We apply the template fitting technique to estimate photometric redshifts by using the ZEBRA photometric-redshift code and adopting a modified set of adaptive templates. We evaluate the bias (median relative offset between the output photometric redshifts and input redshifts), normalized median absolute deviation (σ NMAD) and outlier fraction (f outlier) of photometric redshifts in two typical WFST observational cases, the single 30 s exposure observations (hereafter shallow mode) and co-added 50 minutes exposure observations (hereafter deep mode). We find bias ≲0.006, σ NMAD ≲ 0.03, and f outlier ≲ 5% in the shallow mode and bias ≈0.005, σ NMAD ≈ 0.06, and f outlier ≈ 17%–27% in the deep mode, respectively, under various lunar phases. Combining the WFST mock observational data with that from the upcoming CSST and Euclid surveys, we demonstrate that the z phot results can be significantly improved, with f outlier ≈ 1% and σ NMAD ≈ 0.02.

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“…In addition, WL data is expected to be more sensitive than the CMB anisotropies. Many recent and upcoming surveys, including Dark Energy Survey (DES) [15], Kilo-Degree Survey (KiDS) [16,17], Subaru Hyper Suprime-Cam (HSC) [18,19], Euclid [20], the Vera C. Rubin Observatory [21], the Nancy Grace Roman Space Telescope [22], the Wide Filed Survey Telescope (WFST) [23,24], the Mephisto Telescope [25,26] and China Space Station Telescope (CSST) [27][28][29], greatly improve our understanding of the matter distribution in the late universe. They, in turn, have the potential to reveal the fundamental physics of the interaction between DM and baryonic matter.…”

Section: Introductionmentioning

confidence: 99%

Space Astronomy in China

Zhang

2022

Space Science in China

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We investigate the elastic scattering cross section between dark matter and protons using the DES Year 3 weak lensing data. This scattering induces a dark acoustic oscillation structure in the matter power spectra. To address non-linear effects at low redshift, we utilize principal component analysis alongside a limited set of N -body simulations, improving the reliability of our matter power spectrum prediction. We further perform a robust Markov Chain Monte Carlo analysis to derive the upper bounds on the DM-proton elastic scattering cross-section, assuming different velocity dependencies. Our results, presented as the first Frequentist upper limits, are compared with the ones obtained by Bayesian approach. Compared with the upper limits derived from the Planck cosmic microwave background data, our findings from DES Year 3 data exhibit improvements of up to a factor of five. In addition, we forecast the future sensitivities of the China Space Station Telescope, the upcoming capabilities of this telescope could improve the current limits by approximately one order of magnitude.

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Limiting Magnitudes of the Wide Field Survey Telescope (WFST)

Cited by 15 publications

References 28 publications

Exploring mirror twin Higgs cosmology with present and future weak lensing surveys

Exploring mirror twin Higgs cosmology with present and future weak lensing surveys

Preliminary Study of Photometric Redshifts Based on the Wide Field Survey Telescope

Space Astronomy in China

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