Cosmological Constraints from Type Ia Supernovae Peculiar Velocity Measurements

2007/05/31 by Christopher Gordon, Chris Gordon, Kate Land +2 · 3 citations
Physics and Astronomy · #Cosmology and Gravitation Theories #Gamma-ray bursts and supernovae #Stellar, planetary, and galactic studies #astro-ph #gr-qc #hep-ph #hep-th

paper · pdf · doi:10.1103/physrevlett.99.081301

published as Phys.Rev.Lett.99:081301,2007 · 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

openalex publication_date 2007/08/20 · arxiv created 2007/09/07 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We detect the correlated peculiar velocities of nearby type Ia supernovae (SNe), while highlighting an error in some of the literature. We find sigma8 = 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 approximately 35% if the coherent peculiar velocities are not included.

Citations

• Measurements of Ω and Λ from 42 High‐Redshift Supernovae
• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• Power spectrum shape from peculiar velocity data
• Correlated fluctuations in luminosity distance and the importance of peculiar motion in supernova surveys

Cited by

• Peculiar velocities into the next generation: cosmological parameters from large surveys without bias from non-linear structure
• Cosmological model with local symmetry of very special relativity and constraints on it from supernovae
• Searching for modified gravity: scale and redshift dependent constraints from galaxy peculiar velocities