Cosmography alert 🚨

Jim Peebles strikes again on flat patterns in the cosmic structure, with an update of the evidence supporting an extended plane of de Vaucouleurs' Local Supercluster.

https://arxiv.org/abs/2605.11184

#Cosmology #Cosmography #galaxies #Astronomy #Astrophysics #Astrodon #science #news #JimPeebles #PJEPeebles #Peebles #GérarddeVaucouleurs #supercluster #LocalSupercluster

The Extended Plane of the Local Supercluster

An update of the evidence that radio galaxies and clusters of galaxies are more common than average near the plane of the de Vaucouleurs Local Supercluster shows that in the distance range 100 to 200Mpc objects whose positions are correlated with the plane of the Local Supercluster include galaxies that are exceptionally luminous at two microns, radio galaxies, and clusters of galaxies. There can be little doubt about this property of cosmic structure. I also argue for detection of this correlation for the galaxies at 400Mpc distance that are exceptionally luminous at two microns. It will be interesting to learn whether these results are expected in the standard cosmology.

arXiv.org
The velocity field in the local supercluster.

A Local Supercluster velocity field model is considered which includes galaxy deceleration by spherically symmetric density enhancement and Local Group random motion with respect to nearby galaxies, and whose free parameters are adjusted to minimize scatter about the IR luminosity-H I velocity width relation. This adjustment yields a best estimate for the amplitude of the deceleration pattern at the Local Group position of 250 + or - 64 km/sec, and a total velocity toward the Virgo cluster of 331 + or - 41 km/sec. Potential systematic errors have been minimized through the selective pruning of the sample used, and Monte Carlo experiment calibration of the remaining systematic errors. A significant reduction in residual amplitudes is found upon testing for differential rotation about the center of the Supercluster. The derived total velocity with respect to the Supercluster shows better agreement with the velocity inferred from the 3 K background dipole anisotropy than has been previously obtained.

NASA/ADS