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The Dipole of the Pantheon+SH0ES Data
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The Dipole of the Pantheon+SH0ES Data
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In this paper we determine the dipole in the distance redshift relation from the Pantheon+ data. We find that, while its amplitude roughly agrees with the dipole found in the cosmic microwave background which is attributed to the motion of the solar system with respect to the cosmic rest frame, the direction is different with a significance of slightly more than $3\si$. While the amplitude depends on the lower redshift cutoff, the direction is quite stable. For redshift cuts of order $z_{\rm cut} \simeq 0.05$ and higher, the dipole is no longer detected with high statistical significance. An important r\^ole seems to be played by the redshift corrections for peculiar velocities.
Forward citations
Cited by 5 Pith papers
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Analysis of galaxy cluster and supernova data reveals a ~2σ directional variation in the Hubble constant, robust across calibration methods and aligned with the CMB dipole.
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Local Hubble constant anisotropy in Cosmicflows-4 data is primarily attributed to peculiar velocities and survey structure rather than cosmic-scale isotropy violation, with limited implications for the Hubble tension.
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Revisiting cosmic anisotropy with the Pantheon+ compilation
Re-analysis of Pantheon+ supernovae finds no statistically compelling evidence for intrinsic cosmic anisotropy; reported signals are subsample-dependent and attributed to data distribution artifacts.
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