Cosmological Constraints from Type Ia Supernovae Peculiar Velocity Measurements
Astrophysics
2009-11-16 v5 General Relativity and Quantum Cosmology
High Energy Physics - Phenomenology
High Energy Physics - Theory
Abstract
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.
Keywords
Cite
@article{arxiv.0705.1718,
title = {Cosmological Constraints from Type Ia Supernovae Peculiar Velocity Measurements},
author = {Christopher Gordon and Kate Land and Anze Slosar},
journal= {arXiv preprint arXiv:0705.1718},
year = {2009}
}
Comments
5 pages, 4 figures. V2: references added. V3: clarifying comments added in response to referee reports. V4: typo in eq. 6 corrected. V5: error in Fig. 1 corrected