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This research aims to test the validity of the cosmological principle using quasar data.

April 1, 2026

Testing the cosmological principle with quasars

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Observational analysis finds no significant deviation from the cosmological principle in quasars, suggesting its validity.

This research aims to test the validity of the cosmological principle using quasar data.
Analyzed the dipole signal from the DESI DR1 catalogue
Sampled 1,176,570 quasars with redshifts between 0.8 and 3.0
Measured peculiar velocities and compared them to CMB dipole predictions
Found a peculiar velocity of |v| = 443.8 ± 204.1 km/s
Direction deviates from CMB dipole at coordinates (l, b) = (107.4 ± 86.8, 28.4 ± 45.2)
No significant deviations from the cosmological principle in quasar data.

Chen et al. (2026) studied this question.

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