The low multipoles in the Pantheon+SH0ES data
arxiv(2024)
摘要
In previous work we have shown that the dipole in the low redshift supernovae
of the Pantheon+SH0ES data does not agree with the one inferred from the
velocity of the solar system as obtained from CMB data. We interpreted this as
the presence of significant bulk velocities. In this paper we study the
monopole, dipole and quadrupole in the Pantheon+SH0ES data. We find that in
addition to the dipole also both, the monopole and the quadrupole are detected
with high significance. They are of similar amplitudes as the bulk flow. While
the monopole is only significant at very low redshift, the quadrupole even
increases with redshift.
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