New SBF distance data confirm a steradian-scale flow converging at ~70 Mpc that matches the direction and amplitude of the CMB dipole and the original Great Attractor model.
The CMB Dipole: The Most Recent Measurement And Some History
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abstract
The largest anisotropy in the cosmic microwave background (CMB) is the $\approx 3$ mK dipole assumed to be due to our velocity with respect to the CMB. Over the past ten years the precision of our knowledge of the dipole has increased by a factor of ten. We discuss the most recent measurement of this dipole obtained from the four year COBE Differential Microwave Radiometers (DMR) as reported by Lineweaver \etal (1996). The inferred velocity of the Local Group is $v_{LG}= 627 \pm 22$ km/s in the direction $\ell = 276\deg \pm 3$, $b= 30\deg \pm 2$. We compare this most recent measurement to a compilation of more than 30 years of dipole observations.
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Gaia astrometry plus spectroscopic catalogs yields the tightest constraints yet on extragalactic proper motion, reaching within a factor of 1.3 of the CMB dipole amplitude for nearby galaxies.
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Return to the Great Attractor: Strong Evidence for a Steradian-sized Flow Converging at $\sim$70 Mpc within the GA Supercluster and Aligned with the CMB Dipole
New SBF distance data confirm a steradian-scale flow converging at ~70 Mpc that matches the direction and amplitude of the CMB dipole and the original Great Attractor model.