We then test the novel predictions of MOND using evidence from galaxies, galaxy groups, galaxy clusters, and the large-scale structure of the universe. We review the MOND theory and its consequences, including in a cosmological context where we advocate a hybrid approach involving light sterile neutrinos to address MOND’s cluster-scale issues. This missing gravity problem may indicate a breakdown of GR at low accelerations, as postulated by Milgromian dynamics (MOND).
Eric hansen hyper bullet full#
Kinematic SZ effect, providing a full 3-dimensional description of velocities.Īstronomical observations reveal a major deficiency in our understanding of physics-the detectable mass is insufficient to explain the observed motions in a huge variety of systems given our current understanding of gravity, Einstein’s General theory of Relativity (GR). Generally, the tangential component of the peculiar velocities of clustersĭerived by our method complements the radial component determined by the Method may be extended to smaller redshift differences using the Ly-alphaįorest towards QSOs lensed by more typical clusters of galaxies. The tension with LCDM, which is inferred from gas motion less directly. Measures the tangential motion of the subclusters directly, thereby clarifying Generation high-throughput optical-IR spectrographs. (ALMA) for molecular emission, and is near the resolution limit of the new This is within the range of the Atacama Large Millimeter/sub-millimeter Array The bullet component will show the largest frequency shifts up to ~0.5 km/sec. Triply-lensed images of systems "G" and "H" straddling the critical curve of Gravitational lensing features of this system.
N-body/hydrodynamical simulations constrained by the observed X-ray and The velocity field is modeled using self-consistent Using multiply-lensed background galaxies detected with the Hubble Space To the large collision velocity and because the lensing deflection and theĬluster fields can be calculated in advance.
Is likely to be the best candidate for the first measurement of this effect due Of the sky with velocities boosted by their mutual gravity. Of the mass components, and it is maximal for clusters colliding in the plane The scalar product of the lensing deflection angle with the tangential velocity The moving cluster effect can be expressed as We show that the fast moving component of the "bullet cluster" (1E0657-56)Ĭan induce potentially resolvable redshift differences between multiply-lensed
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