Does the Universe Accelerate Equally in all Directions?

Details Does the Universe Accelerate Equally in all Directions? Does the Universe Accelerate Equally in all Directions?

2009-09-22

arxiv.org/abs/0909.3861v1

Mon.Not.Roy.Astron.Soc.401:1409-1414,2010

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

7 pages, 6 figures, Accepted for publication in MNRAS

Scientific paper

We employ the Union compilation of Type Ia supernovae with a maximum likelihood analysis to search for a dark energy dipole. To approach this problem, we present a simple, computationally efficient, and largely model independent method. We opted to weight each SN by its observed error estimate, so poorly measured SNe that deviate substantially from the Hubble law do not produce spurious results. We find, with very low significance, a dipole in the cosmic acceleration directed roughly towards the cosmic microwave background dipole, but this is almost certainly coincidental.

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