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- W3100702859 abstract "When photons from distant galaxies and stars pass through our neighboring environment, the wavelengths of the photons would be shifted by our local gravitational potential. This local gravitational redshift effect can potentially have an impact on the measurement of cosmological distance-redshift relation. Using available supernovae data, Wojtak et al [1] found seemingly large biases of cosmological parameters for some extended models (non-flat $Lambda$CDM, $w$CDM, etc.). Huang [2] pointed out that, however, the biases can be reduced to a negligible level if cosmic microwave background (CMB) data are added to break the strong degeneracy between parameters in the extended models. In this article we forecast the cosmological bias due to local gravitational redshifts for a future WFIRST-like supernovae survey. We find that the local gravitational redshift effect remains negligible, provided that CMB data or some future redshift survey data are added to break the degeneracy between parameters." @default.
- W3100702859 created "2020-11-23" @default.
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- W3100702859 date "2019-09-01" @default.
- W3100702859 modified "2023-10-18" @default.
- W3100702859 title "Forecasting cosmological bias due to local gravitational redshift" @default.
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- W3100702859 doi "https://doi.org/10.1142/s0218271819501505" @default.
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