Regular Article - Theoretical Physics
A tomographic test of cosmic anisotropy with the recently-released quasar sample
Department of Astronomy, Beijing Normal University, 100875, Beijing, China
Accepted: 28 September 2021
Published online: 26 October 2021
We test the cosmic anisotropy in the dipole-modulated CDM model and Finslerian cosmological model with the recently-released quasar sample. Based on the redshift tomographic method, the quasar sample is divided into two subsets and by different cutting redshifts. The dipole amplitudes of the two cosmological models from the subsets are very weak. We find that quasars at a higher redshift range may provide more detailed information about the dipole amplitude . The dipole directions of each cosmological model from the subsets and are deviated by level. The Pantheon sample is combined with the two subsets. The dipole amplitude from the two combined datasets is also very weak. In the dipole-modulated CDM model, the dipole direction from the combined dataset quasar at and Pantheon sample is far away from the one given by the Pantheon sample. In the Finslerian cosmological model, the dipole directions from the two combined datasets are close to the one in the Pantheon sample.
© The Author(s) 2021
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