For an observer with peculiar motion, the cosmic redshift-drift signal gains a dipolar correction proportional to the flow's projected expansion, shear, and acceleration; calibrated to CF4, it is subdominant and cannot mimic an accelerating EdS universe.
Marconi et al., inGround-based and Airborne Instrumentation for Astronomy X(2024), vol
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Expected redshift drift for tilted observers
For an observer with peculiar motion, the cosmic redshift-drift signal gains a dipolar correction proportional to the flow's projected expansion, shear, and acceleration; calibrated to CF4, it is subdominant and cannot mimic an accelerating EdS universe.