The Tully-Fisher delta
RSI predicts that galaxies upstream in the Inhale current rotate faster than galaxies of equal mass in Exhale zones.
Astronomers use the Tully-Fisher relation to link a galaxy's luminosity, and so its mass, to how fast it rotates. The data show a known scatter, which standard physics explains by adjusting the amount of dark matter in each galaxy, case by case.
RSI offers a mechanical account. The theory holds that a galaxy's orbital speed is supported by the outside pressure of the Eternal Consonance pushing against the galaxy's own low-pressure density shadow. If so, rotation speed should depend partly on where a galaxy sits within the Universal Bulk Flow.
The prediction is specific. Galaxies upstream in the Inhale current, toward the center of the Laniakea supercluster, should rotate 5 to 7 percent faster than galaxies of the same mass in Exhale zones. A test would compare rotation velocities in spiral galaxy surveys such as SDSS against each galaxy's position in the bulk flow. The test has not yet been done; a public catalogue such as Cosmicflows-4 would allow it.
From the paper: Chapter IX, The Tully-Fisher Delta. Read the full section
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