New study questions dark matter in galaxies and clusters of galaxies
A new paper examines galaxy rotation curves without exotic dark matter and seeks to describe a modified Newtonian acceleration law derived from a relativistic modification of Einstein’s gravitational theory. Details are available in the January 10th, 2006, edition of The Astrophysical Journal 636, pp. 721-741.
The study is entitled “Galaxy Rotation Curves Without Non-Baryonic Dark Matter” and is co-authored by John Moffat, Perimeter Institute for Theoretical Physics, and Joel Brownstein, Perimeter Institute for Theoretical Physics.
This work, in conjunction with other research, may one day help to explain the Pioneer 10 – 11 spacecraft anomaly. The two space probes, launched in 1972 and 1973 respectively, are now at the edge of the solar system on trajectories that cannot yet be fully explained based on what is known about Newtonian and Einstein gravity.
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