Cosmological Model with a Local Void: New Supernova Constraints

Details Cosmological Model with a Local Void: New Supernova Constraints Cosmological Model with a Local Void: New Supernova Constraints

2009-07-21

arxiv.org/abs/0907.3578v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

7 pages, 6 figures, to appears in the proceedings of Particle Physics, Astrophysics & Quantum Field Theory: 75 Years since Sol

Scientific paper

A simple inhomogeneous cosmological model with a local void is constrained with the latest Union supernova compilation. To fit the supernova data, a large local void on the scales of 1 Gpc is found, contrary to the small scales of 200 Mpc in the previous finding. A more realistic inhomogeneous cosmological model may be required to fit the supernova data. Alternatively, a clumpy universe with clumpiness parameter < 1 can fit the supernova data with reduced local void scales.

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