Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 442, Issue 2, Pages 1117-1122Publisher
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stu920
Keywords
cosmology: theory
Categories
Funding
- Australian Research Council through a Future Fellowship [FT100100595]
- Jean Rogerson Scholarship
- top-up scholarship from the University of Western Australia
- CSIRO Malcolm McInstosh Lecture bankmecu scholarship
- ARC Centre of Excellence for All Sky Astrophysics [CE110001020]
- UWA-UQ Bilateral Research Collaboration Award
- Australian Research Council [FT100100595] Funding Source: Australian Research Council
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The way that peculiar velocities are often inferred from measurements of distances and redshifts makes an approximation, v(p) = cz - H0D, that gives significant errors even at relatively low redshifts (overestimates by Delta v(p) similar to 100 km s(-1) at z similar to 0.04). Here, we demonstrate where the approximation breaks down, the systematic offset it introduces, and how the exact calculation should be implemented.
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