This Week in the Universe: January 25th – January 31st

Just a link collection today; I’m scrambling with deadlines right now.

Astrophysics and Gravitation:

New Most Distance Galaxy Candidate Found

For more, see NASA’s Hubble Finds Most Distant Galaxy Candidate Ever Seen in Universe.

Bayesian Model to Determine Size of the Universe

M. Vardanyan, R. Trotta, & J. Silk (2011). Applications of Bayesian model averaging to the curvature and size of the Universe arXiv arXiv: 1101.5476v1

For more, see New Model Says the Cosmos Is At Least 250 Times Larger Than the Visible Universe.

Black Hole – Dark Matter Correlation? Nope.

John Kormendy, & Ralf Bender (2011). Supermassive black holes do not correlate with dark matter halos of galaxies Nature 469, 377 (2011) arXiv: 1101.4650v1

For more, see Dark matter does not act as a growth factor.

High Energy Physics and Particles:

Measurement of the Muon Lifetime and Determination of the Fermi Constant

D. M. Webber et al. (MuLan Collaboration) (2011). Measurement of the Positive Muon Lifetime and Determination of the Fermi Constant to Part-per-Million Precision Physical Review Letters, 106 (4) DOI: 10.1103/PhysRevLett.106.041803

For more, see How Strong Is the Weak Force? New Measurement of the Muon Lifetime.

General Relativity, Quantum Gravity, et al.:

Virtual Black Holes in Hyperbolic Metamaterials

Igor I. Smolyaninov (2011). Virtual Black Holes in Hyperbolic Metamaterials arXiv arXiv: 1101.4625v1

For more, see Physicist Discovers How To Make Quantum Foam In A Test Tube.

Gravity as a Diffeomorphism Invariant Gauge Theory

Kirill Krasnov (2011). Gravity as a diffeomorphism invariant gauge theory arXiv arXiv: 1101.4788v1

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