Cosmological Constraints from Type Ia Supernovae Peculiar Velocity Measurements

Details Cosmological Constraints from Type Ia Supernovae Peculiar Velocity Measurements Cosmological Constraints from Type Ia Supernovae Peculiar Velocity Measurements

2007-05-11

arxiv.org/abs/0705.1718v5

Phys.Rev.Lett.99:081301,2007

Astronomy and Astrophysics

Astrophysics

5 pages, 4 figures. V2: references added. V3: clarifying comments added in response to referee reports. V4: typo in eq. 6 corr

Scientific paper

10.1103/PhysRevLett.99.081301

We detect the correlated peculiar velocities of nearby type Ia supernovae (SNe), while highlighting an error in some of the literature. We find sigma_8=0.79 +/- 0.22 from SNe, and examine the potential of this method to constrain cosmological parameters in the future. We demonstrate that a survey of 300 low-z SNe (such as the nearby SNfactory) will underestimate the errors on w by about 35% if the coherent peculiar velocities are not included.

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