Gaussian Process reconstruction of CMB temperature data yields mild (~2 sigma) hints of deviation from T(z)=T0(1+z) at low redshift and a slight tension with COBE/FIRAS.
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Revisiting the temperature evolution law of the CMB with gaussian processes
Gaussian Process reconstruction of CMB temperature data yields mild (~2 sigma) hints of deviation from T(z)=T0(1+z) at low redshift and a slight tension with COBE/FIRAS.