Forecast of neutrino cosmology from the CSST photometric galaxy clustering and cosmic shear surveys

Author:

Lin Hengjie12,Gong Yan13ORCID,Chen Xuelei245,Chan Kwan Chuen67ORCID,Fan Zuhui8,Zhan Hu19

Affiliation:

1. Key Laboratory of Space Astronomy and Technology, National Astronomical Observatories, Chinese Academy of Sciences , 20A Datun Road, Beijing 100012, China

2. School of Astronomy and Space Sciences, University of Chinese Academy of Sciences , Beijing 100049, China

3. Science Center for China Space Station Telescope, National Astronomical Observatories, Chinese Academy of Sciences , 20A Datun Road, Beijing 100101, China

4. Key Laboratory for Computational Astrophysics, National Astronomical Observatories, Chinese Academy of Sciences , 20A Datun Road, Beijing 100101, China

5. Centre for High Energy Physics, Peking University , Beijing 100871, China

6. School of Physics and Astronomy, Sun Yat-sen University , 2 Daxue Road, Tangjia, Zhuhai 519082, China

7. CSST Science Center for the Guangdong-Hongkong-Macau Greater Bay Area , SYSU, Zhuhai 519082, China

8. South-Western Institute for Astronomy Research, Yunnan University , Kunming 650500, China

9. Kavli Institute for Astronomy and Astrophysics, Peking University , Beijing 100871, China

Abstract

ABSTRACT China Space Station Telescope (CSST) is a forthcoming powerful Stage IV space-based optical survey equipment. It is expected to explore a number of important cosmological problems in extremely high precision. In this work, we focus on investigating the constraints on neutrino mass and other cosmological parameters under the model of cold dark matter with a constant equation of state of dark energy (wCDM), using the mock data from the CSST photometric galaxy clustering and cosmic shear surveys (i.e. 3 × 2 pt). The systematics from galaxy bias, photometric redshift uncertainties, intrinsic alignment, shear calibration, baryonic feedback, non-linear, and instrumental effects are also included in the analysis. We generate the mock data based on the COSMOS catalogue considering the instrumental and observational effects of the CSST, and make use of the Markov chain Monte Carlo method to perform the constraints. Comparing to the results from current similar measurements, we find that CSST 3 × 2 pt surveys can improve the constraints on the cosmological parameters by one order of magnitude at least. We can obtain an upper limit for the sum of neutrino mass Σmν ≲ 0.36 (0.56) eV at 68 per cent (95 per cent) confidence level (CL), and Σmν ≲ 0.23 (0.29) eV at 68 per cent (95 per cent) CL if we ignore the baryonic effect, which is comparable to the Planck results and much better than the current photometric surveys. This indicates that the CSST photometric surveys can provide stringent constraints on the neutrino mass and other cosmological parameters, and the results also can be further improved by including data from other kinds of CSST cosmological surveys.

Funder

MOST

National Natural Science Foundation of China

Chinese Academy of Sciences

KCC

National Science Foundation

China Manned Space

Publisher

Oxford University Press (OUP)

Subject

Space and Planetary Science,Astronomy and Astrophysics

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